A coating solution for coating a metal sheet to be subjected to complicated forming is disclosed. The coating solution contains an acrylic resin having a glass transition point (Tg) of 100° C. or higher and an acid value-to-glass transition point ratio R=acid value (mg-KOH/g)/Tg (° C.) of 1.50 or more, and a polyolefin wax having a melting point of 100° C. or higher and 145° C. or lower and an average particle diameter of 3.0 μm or less and is applied to a metal sheet.
Provided is an austenitic stainless steel that realizes both high low-temperature strength and sufficient corrosion resistance at low cost. An austenitic stainless steel according to the present disclosure has a component composition comprising, in mass%, C: 0.050-0.100%, Si: 0.05-1.00%, and Mn: 5.0-20.0%, P: 0.030% or less, S: 0.0050% or less, Al: 0.070% or less, Cu: 1.5-3.5%, and Ni: 5.0-10.0%, Cr: 11.0-20.0%, N: 0.05-0.20%, W: 0.05-0.50%, O: 0.0050% or less, Ti: 0.005% or less, and Nb: 0.005% or less, the balance being Fe and inevitable impurities. The austenitic stainless steel also has: a microstructure in which the average crystal grain size is less than 30 μm, the dislocation density is 1.0 × 1014m-2 or more, and the amount of precipitated Cr is less than 1.0 mass%; and a mechanical property in which the yield stress demonstrated in a tensile test at −269°C is 1000 MPa or more.
Provided is a low-cost austenitic stainless steel having excellent low-temperature toughness in a welding heat affected portion. An austenitic stainless steel according to the present disclosure has: a component composition containing, in mass%, 0.050-0.100% of C, 0.05-1.00% of Si, 5.0-20.0% of Mn, 0.030% or less of P, 0.0050% or less of S, 0.070% or less of Al, 1.5-3.5% of Cu, 5.0-10.0% of Ni, 11.0-20.0% of Cr, 0.05-0.20% of N, 0.05-0.50% of W, 0.0050% or less of O, 0.005% or less of Ti, and 0.005% or less of Nb, the remaining portion being Fe and unavoidable impurities; a micro-structure in which the number proportion of crystal grains having an aspect ratio (long side/short side) of 3.5 or less is 85% or more, and in which the amount of deposited Cr having a diameter greater than 100 nm is 0.2 mass% or less; and a characteristic regarding having an absorption energy of 55 J or more as determined by a Charpy impact test at -269°C in a coarse grain zone of a welding heat affected portion.
[Problem] To provide a sintered ore manufacturing device capable of suppressing unevenness in sintering of a charged raw material. [Solution] A sintered ore manufacturing device is of a Dwight-Lloyd-type. This sintered ore manufacturing device comprises: a pallet that is circulated and on which a raw material layer of a raw material of sintered ore is formed; an ignition furnace that sinters the raw material layer on the pallet by using a line burner; and an ore discharge section that is positioned downstream of the ignition furnace and that discharges the sintered raw material layer. The sintered ore manufacturing device comprises: a sintered amount data generation unit that generates, on the basis of the first layer thickness, which is a layer thickness of the raw material layer leveled by a cut gate positioned upstream of a sintering machine, and the second layer thickness, which is a layer thickness of the raw material layer in the ore discharge section, sintered amount data, which is a sintered amount of the raw material layer; and a gas amount adjustment unit that, on the basis of the sintered amount data, adjusts the amount of combustion gas supplied to the line burner of the sintering machine.
-10-10 of 40 J or above at a test temperature of -10°C in a Charpy impact test. Relationship (1): Cr + 0.22 × Ni + 0.38 × (Mo + 0.5 × W) + 0.89 × Cu + 0.09 × Co ≥ 21.4 Cr, Ni, Mo, W, Cu and Co in relationship (1) are the contained amounts (mass %) of the respective elements, and the contained amount of elements that are not contained is deemed to be zero. Relationship (2): Co-Nb ≥ 0.13 Co and Nb in relationship (2) are the contained amounts (mass %) of the respective elements.
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
A lubricating film-coated steel sheet to be subjected to complicated forming is disclosed. The organic resin film contains an acrylic resin having a glass transition point (Tg) of 100° C. or higher and an acid value ratio R=acid value (mg-KOH/g)/Tg (° C.) of 1.50 or more, and 5 mass % or more of a polyolefin wax having a melting point of 100° C. or higher and 145° C. or lower and an average particle diameter of 3.0 μm or less, and is formed on a surface of a steel sheet at a coating weight, W, of 0.3 g/m2 or more and 2.5 g/m2 or less per surface.
C09D 125/14 - Copolymers of styrene with unsaturated esters
B05D 7/14 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
A hot pressed member that has excellent appearance quality after coating and corrosion resistance at cut portion. The hot pressed member includes a steel sheet, a coated or plated layer containing FeAl, Fe2Al5, and Zn distributed over at least one side of the steel sheet, and a Zn-containing oxide layer distributed over the coated or plated layer. The solute Zn content in the Fe2Al5 is 10 mass % or more.
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
8.
METHOD FOR DETERMINING QUALITY OF PRODUCT, METHOD FOR DETERMINING QUALITY OF CONTINUOUSLY CAST SLAB, METHOD FOR DETERMINING DESTINATION THEREOF, METHOD FOR DETERMINING CONTINUOUS CASTING CONDITIONS, AND METHOD FOR CONTINUOUSLY CASTING STEEL
Provided is a technique capable of determining the quality of a slab cast by continuous casting during casting or after casting. The present invention is a method for determining the quality of a product in which, when the quality of a product formed by rolling a slab cast by using a continuous casting machine is to be determined, a prediction model for hydrogen-induced cracking of a product surface layer section is used, and hydrogen-induced cracking of the product surface layer section is predicted using as an input variable at least one value chosen from among actual measurement values in casting performance data obtained by measurement during casting. The present invention is also a method in which, when the quality of a slab cast by using the continuous casting machine is to be determined using the abovementioned method, the prediction model associates the casting performance data and an area ratio of occurrence of hydrogen-induced cracking in the product surface layer section, at least one value chosen from among actual measurement values in the casting performance data obtained by measurement during casting is input to the prediction model, and the area ratio of occurrence of hydrogen-induced cracking in the surface layer section of the product obtained from the slab during casting or after casting is predicted. The present invention is also a method for determining a destination of the slab on the basis of the obtained predicted value.
222Si alloy phase exists at a number density of less than 100000 pieces/mm222Si alloy phase exists at a number density of 500 pieces/mm222 oxide phase exists at a number density of 100000 pieces/mm2 or more.
Provided is a narrow groove gas shielded arc welding method capable of ensuring sufficiently high strength of welded metal at a high welding operation efficiency. Provided is a narrow-groove gas-shielded arc welding method for joining steel plates having a plate thickness t of 22 mm or greater by narrow-groove multi-layer welding with a groove angle θ of 25° or less and a bottom opening groove gap G of 7-18 mm, wherein the multi-layer welding is performed by multi-electrode welding using three or more electrodes, the average value obtained by dividing the sum total of carbon equivalents (Ceq) defined by formula (1) of each welding wire by the number of electrodes is set to 0.400 mass% or greater, the ratio of the maximum and minimum heat input amounts of each electrode is set to 1.40 or less, and the sum total of the heat input amounts of the respective electrodes is set to 10-60 kJ/cm. (1): Ceq = [C] + [Si]/24 + [Mn]/6 + [Ni]/40 + [Cr]/5 + [Mo]/4 + [V]/14
Provided are a polyester film and the like that make it possible to achieve stable production that saves energy at every production stage of the film, a laminate metal plate, and a laminate metal container and do not cause degradation of the appearance of the film, even, in particular, after a high-temperature sterilization treatment has been performed. A polyester film according to the present invention contains a first polyester and a second polyester. The first polyester is polyethylene terephthalate or a polyethylene terephthalate copolymer of polyethylene terephthalate and a copolymer component. The second polyester is polybutylene terephthalate or a polyethylene terephthalate copolymer of polybutylene terephthalate and a copolymer component. The ratio, by mass%, of the first polyester and the second polyester is 20:80–50:50, and the net intensity on a direct pole figure satisfies a prescribed condition.
B29C 55/06 - Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
B32B 15/09 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin comprising polyesters
B65D 65/40 - Applications of laminates for particular packaging purposes
14.
ABNORMALITY DIAGNOSIS DEVICE AND ABNORMALITY DIAGNOSIS METHOD
An abnormality diagnosis device according to the present invention comprises: an operation signal collection unit that collects a plurality of sensor signals; an operation section operation signal cutout unit that cuts out a sensor signal per each among predetermined operation sections of equipment from the plurality of sensor signals collected by the operation signal collection unit; a signal level acquisition unit that acquires signal levels, per each among frequency bands that are predetermined per each operation section, of the sensor signals per each operation section cut out by the operation section operation signal cutout unit; a deviation degree calculation unit that calculates degrees of deviation from signal levels during normal operation of the same equipment, operation section, and frequency band for the signal levels per each operation section and per each frequency band acquired by the signal level acquisition unit; and an abnormal portion identification unit that identifies an abnormal portion of the equipment on the basis of the deviation degrees calculated by the deviation degree calculation unit.
A furnace slag amount estimation device (1) includes: an input unit (11) configured to receive input data including furnace shape data for a converter, data on components and temperatures of molten metal and slag before start of or during blowing treatment, and slag height data in a furnace of the converter; a slag bulk density calculation unit (13) configured to calculate a slag bulk density after the converter is tilted, using the input data and a model; a slag volume calculation unit (14) configured to calculate a slag volume in the furnace after the converter is tilted, using the slag height data after the converter is tilted, the furnace shape data, and a model; and a slag weight calculation unit (15) configured to calculate a slag weight in the furnace after the converter is tilted and slag is discharged, using the calculated slag bulk density and the calculated slag volume.
G01N 9/32 - Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by using flow properties of fluids, e.g. flow through tubes or apertures
A method anneals a hot-rolled steel strip contains 1.6 to 5.0 mass % Si for an electrical steel sheet using annealing equipment including a heating zone, a soaking zone, and a cooling zone arranged in this order from the upstream side, a thickness meter and a rapid heating device are arranged on the upstream side of the soaking zone, and the heating temperature of the rapid heating device for the steel strip is determined based on the value of LSD defined by the thickness of the steel strip measured with the thickness meter and the threading speed of the steel strip during annealing as represented by the following Expression (1): LSD=t×LS . . . (1), where t is the thickness (mm) of the steel strip, and LS is the threading speed (m/min) of the steel strip.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
01233 i33 ii-133 ii-1i-1 is the width (mm) of a weld bead formed by welding a layer (an (i-1)-th layer) one layer prior to the i-th layer, and i is a natural number of two or more.
The present invention provides a resin-coated metal plate for containers which has excellent workability, film adhesion, and retort whitening resistance. A resin-coated metal plate 1 for containers according to the present invention has a polyester resin coating layer 3, not less than 90 mol% of which is an ethylene terephthalate unit, wherein: the half-width of a peak in the vicinity of 1730 cm-1as measured by causing linearly polarized laser light to be incident on a thickness direction cross-section of the resin coating layer 3 such that the plane of polarization is perpendicular to the thickness direction of the resin coating layer 3 is 14.0-18.5 cm-1at a position which is 1.0 μm from the interface between the resin coating layer 3 and a metal plate 2, and is 14.0-18.0 cm-1at a position which is 1.0 μm from the surface of the resin coating layer 3; and the value A/B, which is obtained by dividing a half-width A by a half-width B is 0.80-1.10, the half-width A being that of a peak in the vicinity of 1730 cm-1 as measured by causing the light to be incident such that the plane of polarization is parallel to the thickness direction of the resin coating layer 3, at a position which is 1.0 μm from the interface between the resin coating layer 3 and the metal plate 2, the half-width B being that of said peak at a position which is 1/2 the thickness of the resin coating layer 3.
B32B 15/09 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin comprising polyesters
B32B 1/00 - Layered products essentially having a general shape other than plane
Provided is a resin-coated metal plate for a container, said plate having excellent processability, film adhesion, and feathering resistance. This resin-coated metal plate 1 for a container has a prescribed resin coating layer 3. The half-value width of a peak in the vicinity of 1730 cm−1, measured by making linearly polarized laser light be incident on a thickness-direction cross-section of the resin coating layer 3 so that the plane of polarization is perpendicular to the thickness direction of the resin coating layer 3, is within a prescribed range. A value A/B determined by dividing the half-value width A of the peak in the vicinity of 1730 cm−1100110100110110 at the (110) plane, based on X-ray diffraction, of the resin coating layer 3, is at least 2.00 and no greater than 6.00.
B32B 15/09 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin comprising polyesters
B32B 1/00 - Layered products essentially having a general shape other than plane
An acoustic diagnosis device according to the present invention comprises: an operation sound collection unit that collects operation sound of equipment; an operation section operation sound extraction unit that collects images indicating the operation state of the equipment, detects predetermined operation sections of the equipment using the collected images, and extracts operation sound for each of the detected operation sections from the operation sound collected by the operation sound collection unit; a sound pressure level acquisition unit that acquires a sound pressure level for each frequency band predetermined for each operation section with respect to the operation sound extracted by the operation section operation sound extraction unit for each operation section; a deviation degree computation unit that computes the degree of deviation from a sound pressure level at the time of normal operation of the same equipment, operation section, and frequency band with respect to the sound pressure level acquired by the sound pressure level acquisition unit for each operation section and each frequency band; and an abnormal site identification unit that identifies an abnormal site of the equipment on the basis of the degree of deviation computed by the deviation degree computation unit.
An acoustic diagnostic device according to the present invention comprises: an operation sound collection unit that collects operation sound of a facility; an operation section operation sound cut-out unit that cuts out an operation sound for each predetermined operation section of the facility from the operation sound collected by the operation sound collection unit; a sound pressure level acquisition unit that acquires a sound pressure level for each predetermined frequency band for each operation section for the operation sound for each operation section cut out by the operation section operation sound cut-out unit; a deviation degree calculation unit that calculates a deviation degree from a sound pressure level during normal operation of the same facility, operation section, and frequency band with respect to the sound pressure level for each operation section and each frequency band acquired by the sound pressure level acquisition unit; and an abnormal portion identification unit that identifies an abnormal portion of the facility on the basis of the deviation degree calculated by the deviation degree calculation unit.
An agent for forming a solid lubricating coating film on a thread portion of oil country tubular goods, in which a binder resin contains a prepolymer and a curing agent, the prepolymer is formed of one or more epoxy resins, 70 parts by weight or more of the prepolymer is contained with respect to 100 parts by weight of the binder resin, the epoxy resin constituting the prepolymer has an epoxy equivalent of 100 or more and 500 or less, the solid lubricant contains boron nitride (BN) in an amount of 80% by weight or more, BN has an average particle size of 10 μm or less, and a total weight of the solid lubricant is 0.1 times or more and two times or less a total weight of the binder resin.
C10M 111/04 - Lubricating compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups , each of these compounds being essential at least one of them being a macromolecular organic compound
C10M 103/00 - Lubricating compositions characterised by the base-material being an inorganic material
C10M 107/32 - Condensation polymers of aldehydes or ketones; Polyesters; Polyethers
C10N 50/02 - Form in which the lubricant is applied to the material being lubricated dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating
F16L 15/04 - Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
Provided are an iron-based mixed powder and an oxygen reactant which can be easily produced, have high reactivity with oxygen, and are inhibited from generating hydrogen gas. The iron-based mixed powder comprises an iron-based powder having a ratio of the number of oxygen atoms to the number of iron atoms, O/Fe, of 0.800 or less and a sulfur-containing powder having a sulfur content of 10.000-100.000 mass%, wherein the content of the sulfur-containing powder is 0.020-5.000 mass% with respect to the sum of the content of the iron-based powder and the content of the sulfur-containing powder.
B01J 20/02 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
B01D 53/14 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by absorption
B01J 20/28 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
A method for detecting an air leak in a sintering machine pallet according to the present invention comprises: a measurement step for using an oxygen concentration meter, installed in a wind leg directly below a plurality of rotating pallets, to measure, for each revolution of each of the pallets, the oxygen concentration in the wind leg, when each of the pallets passes directly above the wind leg; a prediction step for calculating a predicted value of the oxygen concentration by inputting information at the time of processing to a prediction model in which pieces of information indicating the operation state of a Dwight-Lloyd sintering machine and the blending state of sintering raw materials are input variables and the predicted value of oxygen concentration is an output variable; and a detection step for subtracting the predicted value of oxygen concentration calculated in the prediction step from the oxygen concentration measured for each revolution of each of the pallets in the measurement step, and using the difference to detect a pallet in which an air leak has occurred.
A stress-strain relationship estimation method according to the present invention comprises: a step (S1) for performing torsion testing of a first round bar test piece 10 and acquiring a torsion torque and torsion angle relationship; a step (S3) for performing torsion testing of a second round bar test piece 10 that has a parallel portion 11 having a radius smaller than that of the first round bar test piece 10 and acquiring a torsion torque and torsion angle relationship; a step (S5) for determining a shear stress and surface shear strain relationship on the basis of the torsion torque and torsion angle relationships acquired by torsion testing the first round bar test piece 10 and the second round bar test piece 10, respectively; and a step (S7) for converting the shear stress and the surface shear strain into simple tensile stress and strain and estimating the stress and strain relationship.
A steel sheet; a related member; and methods for manufacturing them are disclosed. The steel sheet has a chemical composition including specific amounts of C, Si, Mn, P, S, sol. Al, and N in mass %. The steel sheet has a specific ratio of the total of polygonal ferrite, upper bainite, retained γ, fresh martensite, tempered martensite, and lower bainite, and a specific ratio of a remaining microstructure. The steel sheet has a specific ratio of the number of fresh martensite grains and retained γ grains having an equivalent circular diameter of less than 0.8 μm, and has a specific ratio of the number of fresh martensite grains and retained γ grains having an aspect ratio of 2.0 or more and an equivalent circular diameter of 0.8 μm or more.
Provided is a martensitic stainless seamless steel pipe which has a yield stress of 758 MPa or more, has an absorption energy of 100 J or more in a Charpy impact test at -80°C, and has excellent corrosion resistance. This martensitic stainless seamless steel pipe comprises, in terms of mass%, 0.005%-0.100% of C, 0.05%-1.00% of Si, 0.05%-1.00% of Mn, 0.05% or less of P, 0.005% or less of S, 6.0%-9.0% of Ni, 15.0%-17.5% of Cr, 0.001%-0.10% of Al, 0.001%-0.20% of Nb, 0.1% or less of N, 0.01% or less of O, 3.5% or less of Cu, less than 1.0% of Mo, and 1.0% or less of W, with the balance being Fe and inevitable impurities, and has a component composition that satisfies predetermined formulae (1) and (2).
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
28.
MECHANICAL JOINT, METHOD FOR JOINING MECHANICAL JOINT, STEEL PIPE, STRUCTURE, METHOD FOR CONSTRUCTING STRUCTURE, METHOD FOR DESIGNING MECHANICAL JOINT, AND METHOD FOR MANUFACTURING MECHANICAL JOINT
The purpose of the present invention is to be able to transmit a torsional load without applying rotation or a large load to a joint, and to suppress the separation of the joint and a reduction in proof stress. A mechanical joint 1 comprises: one or more annular grooves 15 formed so as to face an outer peripheral surface of a male joint 3 and an inner peripheral surface of a female joint 5 in an inserted state; a C-type ring member 17 which can be arranged so as to straddle the male joint 3 side and the female joint 5 side in the annular groove 15; rotation prevention pin insertion holes 13M, 13F provided in the male joint 3 and the female joint 5; and a rotation prevention pin 11 penetrating through the rotation prevention pin insertion holes 13M, 13F of the female joint 5 and a C-shaped cutout part 19 to reach the rotation prevention pin insertion holes 13M, 13F of the male joint 3.
Provided are: a steel pipe stably having excellent SSCC resistance; and a method for manufacturing the same. This steel pipe has a component composition containing, in mass%, 0.020-0.080% of C, 0.50-1.80% of Mn, 0.01-0.50% of Mo, 0.0010-0.0080% of N, 0.01-0.50% of Si, 0.015% or less of P, 0.0015% or less of S, 0.010-0.080% of Al, and 0.0005-0.0050% of Ca, the remaining portion being Fe and unavoidable impurities. The structure at a position 0.25 mm outward in the pipe radial direction from the inner circumferential surface of the steel pipe is a bainite structure. The area proportion of bainite having a plane direction in which the crystal plane direction /{110/} is oriented within 15° in the bainite structure is 30.0% or less.
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
C21D 9/50 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
Electric welding machines for metalworking; electric arc
welding apparatus; gas welding machines; metalworking
machines and tools. Welding services; providing information relating to welding;
providing advice relating to welding; metal treating;
providing information relating to the metal treating;
providing advice relating to the metal treating; rental of
welding apparatus.
An arc welded joint and an arc welding method. The arc welded joint has a weld formed by arc welding of an overlap of at least two steel sheets. The weld has a specified flank angle θ. In a region extending 2.0 mm from a bead toe of the weld in a weld metal direction and also extending 2.0 mm from the bead toe in a base material direction, a slag-covered area ratio is 50% or less.
A high strength steel sheet includes a specific microstructure having a specific chemical composition and satisfying the formulas (1) and (2) defined below:
A high strength steel sheet includes a specific microstructure having a specific chemical composition and satisfying the formulas (1) and (2) defined below:
KAM
(
S
)
/
KAM
(
C
)
<
1.
(
1
)
wherein KAM(S) is a KAM (Kernel average misorientation) value of a superficial portion of the steel sheet, and KAM(C) is a KAM value of a central portion of the steel sheet,
A high strength steel sheet includes a specific microstructure having a specific chemical composition and satisfying the formulas (1) and (2) defined below:
KAM
(
S
)
/
KAM
(
C
)
<
1.
(
1
)
wherein KAM(S) is a KAM (Kernel average misorientation) value of a superficial portion of the steel sheet, and KAM(C) is a KAM value of a central portion of the steel sheet,
Hv
(
Q
)
-
Hv
(
S
)
≥
8
(
2
)
wherein Hv(Q) indicates the hardness of a portion at ¼ sheet thickness and Hv(S) indicates the hardness of a superficial portion of the steel sheet.
A steel sheet for hot pressing, a method for producing the steel sheet, a hot-pressed member, and a method for producing the hot-pressed member are disclosed. The steel sheet for hot pressing contains specific components, wherein ferrite constitutes 30% or more and 90% or less by area, pearlite constitutes 10% or more and 70% or less by area, and a remaining microstructure constitutes 5% or less by area, the ferrite has an average aspect ratio in the range of 2.0 or more and 12.0 or less, and the ferrite has an average minor axis length of 5.0 μm or less, the steel sheet contains 500/μm3 or more and 6000/μm3 or less of Ti—Nb complex precipitates with a grain size of 3 nm or more and 50 nm or less, and the steel sheet has a dislocation density of 1.0×1015/m2 or more.
This seam position detection method is a method for detecting the position of a seam portion of a welded steel pipe when heating the welded steel pipe, the method comprising: a position detection step for detecting the post-heating position of the seam portion and the position of a heated portion from images obtained by imaging in the same visual field, the post-heating seam portion and the heated portion irradiated with light of a wavelength different from that of radiation light resulting from the heating; a determination step for determining whether or not it is necessary to correct the post-heating position of the seam portion by comparing the pre-heating position of the seam portion acquired in advance with the post-heating position of the seam portion; and a correction step for correcting the post-heating position of the seam portion on the basis of the pre-heating position of the seam portion if it is necessary to correct the post-heating position of the seam portion.
G01B 11/00 - Measuring arrangements characterised by the use of optical techniques
B21C 37/08 - Making tubes with welded or soldered seams
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
35.
MOLD FOR CONTINUOUS CASTING OF STEEL AND METHOD FOR CONTINUOUS CASTING OF STEEL
The present invention provides a continuous casting mold and a continuous casting method, with which it is possible to carry out continuous casting, while suppressing the occurrence of abnormalities on the surface of a mold plate even under a high-speed casting condition of 2.5 m/minute or more. The present invention specifically provides a mold for continuous casting of steel, the mold comprising: a mold plate which is formed of a copper alloy, the front surface of which forms an inner wall surface of the mold, and the back surface of which is provided with a cooling water path; and a backup plate which is attached to the mold plate so as to cover the cooling water path. The mold is provided with a plurality of dissimilar material filled parts that are each formed by filling a recessed part, which is formed in a region including at least a meniscus on the surface of the mold plate, with a dissimilar material that has a thermal conductivity different from the thermal conductivity of the mold plate. The total cross-sectional area of the cooling water path on the back surface of the mold plate in a range that includes the region where the plurality of dissimilar material filled parts are formed is smaller than the total cross-sectional area of the cooling water path below the range.
A deflector roll, which changes a travelling direction of a metal strip being threaded, includes a roll main body that is rotatably supported by a roll frame and a sliding member that is provided on an outer surface of the roll main body. The sliding member is configured to have the metal strip wrapped thereon and to be movable along an axial direction of the roll main body while maintaining that wrapped state.
The steel sheet comprising a chemical composition containing C, Si, Mn, P, S, Al, N, Ti, Nb, and B, with the balance being Fe and inevitable impurities, and satisfying predetermined formula (1), in which the total area ratio of martensite and bainite is 95% or more, the grain size of prior austenite grains is 10 μm or less, the B concentration at a prior austenite grain boundary is 0.10% or more in mass %, the C concentration at the prior austenite grain boundary is 1.5 times or more than the C content in the steel, the amount of precipitated Fe is 200 mass ppm or less, and for a defined in predetermined formula (2), a ratio of adislocation on dislocation to agrain boundary on the prior austenite grain boundary: adislocation/agrain boundary is 1.3 or more.
A method of predicting a shape change of a press-formed product, includes: generating a blank model which is divided into a plurality of pieces in a sheet thickness direction such that the blank model can be analyzed; acquiring a shape and residual stress in the sheet thickness direction of the press-formed product immediately after the spring back by performing press forming analysis and spring back analysis using the blank model and a die model; setting a value of residual stress relaxed and reduced to an element or an integration point of a sheet thickness surface layer of the press-formed product immediately after spring back; and determining a shape in which moment of force is balanced in the press-formed product for which a value of residual stress of only the sheet thickness surface layer has been set to be relaxed and reduced.
Provided is a nozzle for continuous casting, a continuous casting apparatus, a tundish, and a continuous casting method with which it is possible to suppress the entrainment of slag, suppress the occurrence of problems in operation, and inhibit the deterioration of the yield of molten steel. A nozzle 1 for continuous casting for injecting molten steel from a ladle into a tundish 2 comprises: an immersion part 3 immersed in molten steel in the tundish 2; a bottom part opening part 5 formed, at the tip part of the immersion part 3 on the side towards the bottom part 4 of the tundish 2, so as to discharge molten steel along the direction of the center axis of the immersion part 3; and at least one side surface opening part 6 formed on the side surface of the immersion part 3. The side surface opening part 6 is configured so as to point downward within a range of a predetermined angle from the horizontal plane when the horizontal plane is deemed to be 0°, and the total area S of the opening area of the bottom part opening part 5 and the opening areas of the side surface opening parts 6 is 0.02 m2to 0.15 m2 inclusive.
This method for manufacturing a grain-oriented electrical steel sheet comprises: acquiring data of a decarburization annealed sheet quality index and a finishing annealing condition of a product sheet; acquiring data of an O coating amount and a Ti + V + Zr + Nb coating amount contained in a forsterite coating film of the product sheet; performing multiple regression analysis or machine learning using an actual value of each of the coating amounts as an objective variable and actual values of the decarburization annealed sheet quality index, an annealing separation agent composition, and the finishing annealing condition as explanatory variables, to create a prediction model for each coating amount; and using the prediction model for each coating amount to set, in accordance with the value of the decarburization annealed sheet quality index at each position (m, n) when the steel sheet is divided by i in the longitudinal direction and by j in the width direction, the annealing separation agent composition and the finishing annealing condition so that the O coating amount and the (Ti + V + Zr + Nb coating amount)/O coating amount at each position (m, n) are within a range determined by coating film adhesion.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
H01F 1/147 - Alloys characterised by their composition
A supply heat quantity estimating method includes: estimating a change in carried-out sensible heat by in-furnace passing gas and a change in carried-in sensible heat supplied by a raw material preheated by the in-furnace passing gas, and estimating a quantity of heat supplied to the pig iron in a blast furnace in consideration of the estimated changes in the carried-out sensible heat and carried-in sensible heat. The estimating includes: estimating the carried-out sensible heat in consideration of the quantity of heat released to an outside, and estimating the change in the carried-in sensible heat in consideration of a change in a surface height of the raw material; and estimating a quantity of heat held in a deadman coke, and estimating the quantity of heat supplied to the pig iron in the blast furnace in consideration of the estimated quantity of heat held in the deadman coke.
Provided is a high strength steel sheet with high stretch flangeability and high YR in the rolling direction as well as in the direction orthogonal to the rolling direction with TS of 1180 MPa or more. The high strength steel sheet has a prescribed chemical composition and steel microstructure. In particular, an average grain size of the hard phase is 5.3 μm or less, the volume fraction-carbon concentration ratio of retained austenite (γ) is 0.10 or more and 0.45 or less, and the integration degree of {112} <111> orientation is 1.0 or more.
A driving force transmission mechanism is capable of preventing breakage of an oil chamber when the internal pressure in the oil chamber rises by impact when replacing work rolls and the like. The driving force transmission mechanism transmits power of a driving source to a work roll through a spindle and includes a first gear portion disposed on one end portion of the spindle, a second gear part disposed on the driving source or the work roll and fitted to the first gear part and an oil chamber for supplying a lubricating oil to the first gear part and the second gear part, where the oil chamber is provided with a first valve for discharging inner air in the oil chamber to an outside of the oil chamber and a second valve for introducing outer air into the oil chamber.
B21B 35/12 - Toothed-wheel gearings specially adapted for metal-rolling mills; Housings or mountings therefor
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
44.
STEEL SHEET, MEMBER, AND METHODS FOR MANUFACTURING SAME
Provided are a steel sheet; a related member; and methods for manufacturing the same.
Provided are a steel sheet; a related member; and methods for manufacturing the same.
The steel sheet has a chemical composition including, in mass %, C: 0.06 to 0.25%, Si: 0.4 to 2.5%, Mn: 1.5 to 3.5%, P: 0.02% or less, S: 0.01% or less, sol. Al: less than 1.0%, and N: less than 0.015%, the balance being Fe and incidental impurities, the steel sheet being such that the steel sheet includes a steel microstructure including, in area fraction, polygonal ferrite: 10% or less (including 0%), tempered martensite: 30% or more, fresh martensite: 20% or less (including 0%), lower bainite: 5 to 50%, and, in volume fraction, retained austenite: 5 to 20%, and the steel sheet has SC≥0.5/SC≥0.3×100 of 15% or more.
A stainless steel and copper joined body is provided. A fillet welded lap joint that is a joined portion of stainless steel and copper is formed at an end of the copper. The Cu/Fe ratio of the fillet welded lap joint is 2.3 or more. The fillet welded lap joint includes multiple welding points that are continuous in the welding direction. The average diameter Dmean (mm) of the welding points and the copper thickness (mm) satisfy the relationship of the following Formula (1). The overlap ratio OR of welding points is 10% or more and 80% or less.
A stainless steel and copper joined body is provided. A fillet welded lap joint that is a joined portion of stainless steel and copper is formed at an end of the copper. The Cu/Fe ratio of the fillet welded lap joint is 2.3 or more. The fillet welded lap joint includes multiple welding points that are continuous in the welding direction. The average diameter Dmean (mm) of the welding points and the copper thickness (mm) satisfy the relationship of the following Formula (1). The overlap ratio OR of welding points is 10% or more and 80% or less.
2
t
0.5
≤
D
mean
≤
10
t
0.5
(
1
)
The present disclosure is to reduce the number of surface defects in a grain-oriented electrical steel sheet. When manufacturing a grain-oriented electrical steel sheet, a steel slab is heated before being subjected to hot rolling. The heating includes a first heating process of heating the steel slab to a temperature of lower than 1300° C., and a second heating process of heating the steel slab to a temperature of 1300° C. or higher, where the time from the end of the first heating process to the start of the second heating process is 20 seconds or longer, the oxygen concentration in the atmosphere in the second heating process is 1.0 vol % or less, and the surface of the steel slab is subjected to water cooling at a cooling rate of 3.0° C./s or higher after the second heating process and before the hot rolling.
A resistance spot welded member and a resistance spot welding method. The resistance spot welded member includes a resistance spot weld formed by resistance-spot-welding a plurality of steel sheets including at least one high strength coated steel sheet. The high strength coated steel sheet has a specific chemical composition. The at least one high strength coated steel sheet includes a coated layer, a base metal, and an Fe-based electroplated base layer interposed between the coated layer and the base metal. The amount of solute Si and the amount of solute Mn in a region on a steel sheet surface in the vicinity of the edge of the corona of the resistance spot weld are 35% or less of the amount of solute Si and 35% or less of the amount of solute Mn, respectively, at a position ¼ of the sheet thickness.
A cushion tank device includes: a cushion tank configured to store pickling solution and sludge discharged from a pickling tank; a discharge pipe provided on a bottom of the cushion tank and configured to discharge the sludge to an outside of the cushion tank; and an opening/closing member configured to open and close the discharge pipe. The cushion tank device configure to guide the sludge to the discharge pipe, the inclined surface including an inclined surface part on a lower part of the cushion tank that is inclined to horizon at an angle greater than an angle of repose of the sludge with respect to an inner wall surface of the cushion tank.
A laser welding method is disclosed including butting Si-containing steel sheets and irradiating a gap between the butted steel sheets with a laser beam while feeding a filler wire to the gap thereby melting and solidifying the filler wire and the butted steel sheets to form a weld metal, and thus joining the butted steel sheets together, in which an austenitic wire is used as the filler wire, the width of the gap is set to 0.30 mm or more, and the amount of the filler wire fed to the gap per unit welding length is set within the range of 1.5 to 2.5 times the volume of the gap per unit length, so that a weld metal with an austenite structure is stably obtained. Preferably, the base metal dilution ratio of the weld metal is set to 70% or less.
A stainless steel sheet has a surface quality in which a core height Sk is 1.50 μm or less, a reduced peak height Spk is 0.20 μm or less, and an areal material ratio Smr2 that separates a reduced dale from a core is 80% or less, where the core height Sk, the reduced peak height Spk, and the areal material ratio Smr2 are as specified in JIS B 0681-2:2018. The stainless steel sheet has a whiteness of 50 or greater and an image clarity of 1% or greater.
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
51.
STEEL SHEET, MEMBER, AND METHODS FOR MANUFACTURING SAME
A steel sheet contains, in mass %, C: 0.15 to 0.45%, Si: 1.5% or less, Mn: 1.7% or less, P: 0.03% or less, S: less than 0.0020%, sol. Al: 0.20% or less, N: 0.005% or less, B: 0.0015 to 0.0100%, and at least one of Nb and Ti in a total amount of 0.005 to 0.080%, with the balance being Fe and incidental impurities. The area fraction of martensite with respect to the total area of the microstructure is 95 to 100%, and the diameter of prior γ grains is less than 11.0 μm. The number density A of precipitates having an equivalent circular diameter of 500 nm or more satisfies the formula: A (particles/mm2)≤8.5×105×[B].
The steel sheet comprising a chemical composition containing C, Si, Mn, P, S, Al, N, Ti, Nb, and B, with the balance being Fe and inevitable impurities, and satisfying predetermined formula, in which the total area ratio of martensite and bainite is 95% or more, the average grain size of prior austenite grains is 10 μm or less, the B concentration at a prior austenite grain boundary is 0.10% or more in mass %, a C-concentrated region is provided along a martensitic grain boundary, and the C-concentrated region has a C concentration of 4.0 times or more than the C content in the steel, and the C-concentrated region has a concentration width of 3 nm or more and 100 nm or less in a direction perpendicular to the martensitic grain boundary and a length of 100 nm or more in a direction parallel to the martensitic grain boundary.
A metal-sheet quenching apparatus cools a metal sheet while conveying the metal sheet and includes a cooling tank in which a cooling fluid is to be stored and the metal sheet is immersed in the cooling fluid to be cooled; restraining rolls that are installed inside the cooling tank and convey the metal sheet that has been cooled in the cooling tank while restraining the metal sheet in the thickness direction; a water-level adjustor that adjusts the height of a fluid surface of the cooling fluid inside the cooling tank; and a position control device that adjusts the height of the fluid surface of the cooling fluid inside the cooling tank by controlling the operation of the water-level adjustor.
22222 as the balance. Moreover, the hydrogen concentration in the first reduction annealing at the former stage is adjusted so as to be higher than the hydrogen concentration in the second reduction annealing at the latter stage.
The present invention provides a technique with which it is possible to evaluate the influence of a strain amount prior to trim molding of a rear trim part on a delayed fracture characteristic of a shear end surface. Provided is a delayed fracture characteristic evaluation method for evaluating a delayed fracture characteristic of a shear end surface of a metal plate (3) made of a high-strength steel sheet, wherein: the metal plate (3) to at least a part of which plastic strain has been applied is sheared in a position including the part to which the plastic strain has been applied, so that a test piece (1) of the metal plate having the shear end surface is prepared; and the delayed fracture characteristic of the shear end surface is evaluated by setting the test piece (1) in a hydrogen intrusion environment in a state in which a load stress is applied to the shear end surface of the test piece (1).
The present invention provides a technique with which it is possible to evaluate the influence of a shear condition for shearing to form a shear end surface on a delayed fracture characteristic of the shear end surface. Provided is a delayed fracture characteristic evaluation method for evaluating a delayed fracture characteristic of a shear end surface of a metal plate (10) made of a high-strength steel sheet, wherein: a test piece of the metal plate (10) having the shear end surface is prepared by shearing the metal plate (10); and then, the delayed fracture characteristic of the shear end surface with respect to a shear condition of the shearing is evaluated by setting the test piece in a hydrogen intrusion environment in a state in which a load stress is applied to the shear end surface of the test piece.
The purpose of the present invention is to provide: an arc welded joint in which the slag adhesion amount and spatter adhesion amount are reduced and which has excellent corrosion resistance; and a manufacturing method therefor. This arc welded joint manufactured by arc welding includes a base material, a weld bead formed by mixing and solidifying the base material and a welding wire melted by applying the heat of an arc, and a weld heat-affected part. In a weld spatter-affected part, the number of adhered spatters having a maximum length of 0.2 mm or greater in an adhesion region, the adhered spatters generated during welding and adhered to the weld spatter-affected part is 0.50/cm2RATIOBEADSLAGBEADBEAD covered by the slag, is 15% or less.
ELASTICITY MATRIX DETERMINATION METHOD AND VIBRATION ANALYSIS METHOD FOR LAMINATED IRON CORE OF TRANSFORMER, AND ELASTICITY MATRIX DETERMINATION PROGRAM AND VIBRATION ANALYSIS PROGRAM
This elasticity matrix determination method for a laminated iron core of a transformer comprises: a step for calculating the degree of matching between a noise frequency spectrum and an excitation vibration frequency spectrum for each combination of a first assumed value and a second assumed value of the modulus of transverse elasticity; and a step for adopting the first assumed value and second assumed value when the degree of matching is maximized as moduli of transverse elasticity. The step for calculating the degree of matching includes: a step for calculating the degree of matching for trial points distributed in a predetermined range; a step for setting a limited small area; and a step for calculating the degree of matching for search points located between trial points within the limited small area.
G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
G01H 17/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass
H01F 41/00 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
60.
STEEL MATERIAL CORROSION AMOUNT PREDICTION MODEL GENERATION METHOD, STEEL MATERIAL CORROSION AMOUNT PREDICTION METHOD, STRUCTURE CORROSION MANAGEMENT METHOD, STRUCTURE MANUFACTURING METHOD, STEEL MATERIAL MANAGEMENT METHOD, CORROSION AMOUNT PREDICTION MODEL GENERATION PROGRAM, AND STEEL MATERIAL CORROSION AMOUNT PREDICTION SYSTEM
nn of the steel material in a target period from the corrosion amount of the steel material in a period before the target period and a corrosion-amount increasing amount per unit time.
A reducing agent containing metallic iron and/or iron oxide is added to an oxide containing valuable elements which are Ni and/or Co and Mn and impurity elements which are copper and iron in an amount of 1.5 equivalent or less to obtain a mixed oxide. By heating the mixed oxide, the oxide is reduced to obtain metals. The metals are brought into contact with an acid solution to obtain a leachate. A sulfurizing agent is added to the leachate to precipitate the copper, and a leachate from which the copper has been removed is obtained as a copper removal solution. An oxidizing agent is added to the copper removal solution to precipitate the iron, and the copper removal solution from which the iron has been removed is obtained as a valuable element solution containing the valuable elements. Thus, a valuable element recovery method capable of removing impurity elements and selectively recovering Ni and Co can be provided.
In this method, a reducing agent containing at least one member selected from the group consisting of iron metal and iron oxides is added to an oxide containing at least one valuable element selected from the group consisting of nickel, cobalt, and manganese and further containing copper and iron as impurity elements to obtain an oxide mixture. The oxide mixture is heated to reduce the oxide to thereby obtain metals. The metals are brought into contact with an acid liquid to obtain a leachate containing the valuable element and the impurity elements. A sulfurizing agent is added to the leachate to sediment the copper as copper sulfide, and the leachate from which the copper has been removed is obtained as a copper-free solution. An oxidizing agent is added to the copper-free solution to sediment the iron as iron hydroxide, and the copper-free solution from which the iron has been removed is obtained as a valuable-element solution containing the valuable element. Thus, the present invention can provide a method for recovering a valuable element, the method being capable of removing impurity elements.
A battery case 1 according to the present invention comprises an inner cross member 3 extending in a vehicle width direction so as to span a pair of side wall parts 12, 13 in a body 2. The inner cross member 3 has a top plate part, a pair of vertical wall parts, and a pair of flange parts. The pair of vertical wall parts include a front side vertical wall part and a rear side vertical wall part facing each other in a vehicle front-rear direction. At least one among the front side vertical wall part and the rear side vertical wall part is formed with a ridge line portion extending along the vehicle width direction.
H01M 50/249 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
H01M 50/242 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
65.
PROJECTION WELD JOINT AND METHOD FOR MANUFACTURING SAME
Provided are: a projection weld joint with improved peel strength and delayed fracture resistance; and a method for manufacturing same. A projection weld joint according to the present invention has a steel plate and a nut, the steel plate has a predetermined component composition, and a region a minimum hardness HVa (HV) and a steel plate base material hardness HVm (HV) satisfy the relationship Hva/Hvm≤0.90. The region a is specified as follows in a cross-section including the center line of the nut and passing through the center of the joint between the steel plate and the nut of the projection weld joint. An end point of the nut on an inner peripheral surface side in contact with the steel plate is designated as A, and an end point on an outer peripheral surface side is designated as B, a length of a line segment connecting the end points A, B is designated as 2L, a point moved by L/2 from B to A is designated as C1, a point moved by L on a line formed by the surface of the steel plate from B is designated as C2, points inside the steel plate moved by 0.80 mm in the plate thickness direction of the steel plate from C2 and C1 are respectively designated as points C3 and C4, and the inside of a rectangle formed by connecting C1 to C4 is designated as the region a.
C04B 35/38 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
67.
STEEL PIPE OUT-OF-ROUNDNESS PREDICTION MODEL GENERATION METHOD, STEEL PIPE OUT-OF-ROUNDNESS PREDICTION METHOD, STEEL PIPE OUT-OF-ROUNDNESS CONTROL METHOD, STEEL PIPE MANUFACTURING METHOD, AND STEEL PIPE OUT-OF-ROUNDNESS PREDICTION DEVICE
A steel pipe out-of-roundness prediction model generation method includes: executing a numerical computation in which an input data is an operational condition dataset including one or more operational parameters of an end bending step and one or more operational parameters of a press bending step, and an output data is a steel pipe out-of-roundness after a pipe expanding step, the numerical computation conducted a plurality of times while changing the operational condition dataset, and generating a plurality of pairs of data of the operational condition data set and the steel pipe out-of-roundness data after the pipe expanding step, offline as training data; and generating a model for which an input data is the operational condition dataset, and an output data is the out-of-roundness of the steel pipe after the pipe expanding step, the generation of the model performed offline by machine learning using the plurality of pairs of training data.
A metal-sheet quenching apparatus that cools a metal sheet while conveying the metal sheet. The metal-sheet quenching apparatus includes a cooling device that cools a metal sheet that is conveyed, restraining rolls that convey the metal sheet cooled by the cooling device while restraining the metal sheet in the thickness direction, a roll moving device that moves the restraining rolls in the conveyance direction of the metal sheet, and a movement control device that controls the operation of the roll moving device to adjust the position of the restraining rolls.
An electrical steel strip welded joint is provided that is able to inhibit the occurrence of coil joint fracture on a production line caused by deterioration of mechanical properties and shape of the coil joint. The steel microstructures of the joined portion and the thermo-mechanically affected zone are mainly ferrite phase, and satisfy the relationships of the following Expressions (1) to (4).
An electrical steel strip welded joint is provided that is able to inhibit the occurrence of coil joint fracture on a production line caused by deterioration of mechanical properties and shape of the coil joint. The steel microstructures of the joined portion and the thermo-mechanically affected zone are mainly ferrite phase, and satisfy the relationships of the following Expressions (1) to (4).
Dsz
≤
200
μ
m
(
1
)
Dhaz
1
≤
Dbm
1
(
2
)
Dhaz
2
≤
Dbm
2
(
3
)
0.9
×
(
Hbm
1
+
Hbm
2
)
/
2
≤
Hsz
≤
1.2
×
(
Hbm
1
+
Hbm
2
)
/
2
(
4
)
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
The present invention makes it possible to manufacture a hot-dip galvanized steel sheet of which the surface has a pleasing appearance lacking non-plating, and which has excellent delayed fracture resistance. This method for manufacturing a hot-dip galvanized steel sheet includes annealing a steel sheet in a non-oxidizing atmosphere and then hot-dip galvanizing the steel sheet. The annealing in the non-oxidizing atmosphere includes a first step and a second step. In the first step, a steel sheet is annealed for a predetermined time in a reducing atmosphere having a high hydrogen concentration and a predetermined dew point and temperature so as to reduce the Fe oxide present in the surface layer of the steel sheet. In the subsequent second step, the steel sheet is annealed for a predetermined time in a non-oxidizing atmosphere having a low hydrogen concentration and a predetermined dew point and temperature, and the hydrogen dissolved in the steel is discharged from the steel sheet. If necessary, an oxidation treatment for generating Fe oxide on the surface layer of the steel sheet in a prescribed oxidizing atmosphere is performed before annealing.
The present invention provides a technology for a zinc-plated steel sheet that has a high yield ratio, excellent bendability and stretch flangeability, and excellent hydrogen embrittlement resistance, and has a TS of not less than 780 MPa but less than 1180 MPa. This zinc-plated steel sheet comprises: a steel structure in which the area percentage of ferrite is less than 65%, the total area percentage of martensite and bainite is at least 25%, the area percentage of residual austenite is 3-10%, and at least 70% of all martensite in the steel structure at 1/8 to 3/8 of the thickness of a base steel sheet is tempered martensite containing a carbide having an average particle size of 50-200 nm; and a zinc plating layer formed on the base steel sheet. The zinc-plated steel sheet has a TS of not less than 780 MPa but less than 1180 MPa, a yield ratio of at least 0.60, and a diffusible hydrogen amount of at most 0.45 ppm by mass.
Provided is a technology relating to a galvanized steel sheet that has a high yield ratio, excellent bendability, and excellent hydrogen embrittlement resistance, and has a TS that is greater than or equal to 980 MPa and less than 1470 MPa. This galvanized steel sheet comprises: a steel structure of, by area percentage, less than 50% ferrite, 50% or more martensite and bainite in total, and 10% or less retained austenite, in which 75% or more of the martensite has carbides with an average grain size of 50 nm to 200 nm, and the ratio TM1/TM2 of the area percentage TM1 occupied by tempered martensite in the entire structure in a region from the surface to 1/8 of the sheet thickness and the area percentage TM2 occupied by tempered martensite in the entire structure in a region from 1/8 to 3/8 of the sheet thickness is 0.70 or greater; and a galvanization layer on the surface thereof, wherein the TS is greater than or equal to 980 MPa and less than 1470 MPa, the yield ratio is greater than or equal to 0.60, and the quantity of diffusible hydrogen is less than or equal to 0.45 mass ppm.
22; holding the steel sheet after the oxidation step for at least 20 s at 700°C or higher in a reducing atmosphere having a hydrogen concentration that is greater than 8 vol% and at most 30 vol%; holding the steel sheet for 20-300 s, inclusive, at 750°C or higher in an isothermal atmosphere having a hydrogen concentration of 0.2-8 vol%, inclusive; cooling the steel sheet; immersing the steel sheet in a molten zinc galvanizing bath to obtain a hot-dip galvanized steel sheet; performing an alloying process on the hot-dip galvanized steel sheet to obtain a hot-dip galvannealed steel sheet; and, after cooling the hot-dip galvannealed steel sheet to a cooling stop temperature that is at most a Ms point, holding the steel sheet for at least 30 s at a temperature that is at least the cooling stop temperature and is 100-450°C, in a reheating atmosphere having a hydrogen concentration of at most 0.2 vol%.
The present invention provides a method for producing a plated steel sheet which achieves both an excellent plating property and excellent hydrogen embrittlement resistance even when a steel sheet containing large amounts of Si and Mn is used as a raw material steel sheet. The method for producing a plated steel sheet according to the present invention comprises an oxidation step, a reduction step, a soaking step, a rapid heating step, and a cooling step as preceding steps for a plating step of applying plating treatment to a raw-material steel sheet containing a predetermined amount of Si and a predetermined amount of Mn. In these preceding steps, heat treatment having appropriately controlled atmosphere and heating pattern is applied to the raw-material steel sheet.
Provided is a method for producing a carbon briquette, the method allowing production of a carbon briquette having high strength that withstands use in a blast furnace even in a case where an increased amount of a raw carbon material having poor softening/meltability is used. The method for producing a carbon briquette according to the present invention comprises: a powder preparation step for preparing a carbon material powder having a volatile content of at least 6 wt% D.B. but less than 20 wt% D.B., an O/C ratio, which is the atomic ratio of the number of oxygen atoms to carbon atoms, of 0.040 or more, and a maximum particle size of 300 μm or less; and a hot press step for pressure-molding the carbon material powder under a condition in which the maximum attainable temperature is 600°C to 1250°C in an oxygen-deprived environment, to obtain a carbon briquette.
C04B 35/528 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
C10B 53/08 - Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps or the like
Provided is a method for producing a carbonaceous lump, the method being capable of producing a carbonaceous lump having high strength which withstands an application to a blast furnace even when an amount of use of a raw carbon material having poor thermoplasticity is increased. The method for producing a carbonaceous lump according to the present invention comprises: a powder preparation step for preparing carbon material powders which are obtained by applying heat treatment to a raw carbon material having the Gieseler maximum fluidity MF of 5 ddpm, has a volatile content of 6 wt% D.B. or more and less than 20 wt% D.B., and has the maximum particle diameter of 300 μm or less; and a hot pressing step for applying pressure molding to the carbon material powders under a condition having the maximum arrival temperature of 600°C-1250°C in an oxygen-blocked environment to obtain a carbonaceous lump.
C04B 35/528 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
C10B 53/08 - Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps or the like
C10B 57/04 - Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
77.
ELASTICITY MATRIX DETERMINATION METHOD AND VIBRATION ANALYSIS METHOD FOR LAYERED IRON CORE OF TRANSFORMER, AND ELASTICITY MATRIX DETERMINATION PROGRAM AND VIBRATION ANALYSIS PROGRAM
This elasticity matrix determination method for a layered core of a transformer comprises: a step for calculating a frequency spectrum of a vibration response function with respect to first assumed values and second assumed values of transverse elasticity moduli; a step for calculating a degree of matching between a frequency spectrum of noise and a frequency spectrum of excitation vibration for each combination of the first assumed values and the second assumed values; and a step for adopting a first assumed value and a second assumed value at which the degree of matching has a maximum value as the transverse elasticity moduli. The step for calculating the frequency spectrum of the vibration response function includes: a step for calculating the frequency spectrum of the vibration response function with respect to trial points distributed at a first interval in a two-dimensional space of the first assumed values and the second assumed values; and a step for calculating the frequency spectrum with respect to trial points distributed at a second interval by means of numerical interpolation processing.
Provided are a projection welded joint having improved peel strength, and a manufacturing method therefor. A projection welded joint according to the present invention has a steel sheet and a nut. The steel sheet has a predetermined component composition. The minimum hardness Hvb (HV) of a region b and the base material hardness Hvm (HV) of the steel sheet satisfy Hvb/Hvm≤0.90. The region b includes the center line of the nut of the projection welded joint, and is defined as follows in a cross section passing through the center of the joint between the steel sheet and the nut. An end point on the inner circumferential surface side of the nut in contact with the steel sheet is defined as A; an end point on the outer circumferential surface side is defined as B; a point, inside the steel sheet, that is moved 0.50 mm in the plate thickness direction of the steel sheet from said point B is defined as C; a point, inside the steel sheet, that is moved 0.50 mm in the plate thickness direction of the steel sheet from said point A is defined as D; and the inside of a rectangle formed by connecting said point A, point B, point C, and point D is defined as the region b.
Provided are a projection welded joint having improved peeling strength and delayed fracture resistance, and a method for manufacturing the same. A projection welded joint according to the present invention includes a steel plate and a nut, wherein the steel plate has a predetermined component composition, and a minimum hardness Hvc (HV) of a region (c) and a base material hardness (HV) of the steel plate satisfy the relationship Hvc/Hvm≤0.85. The region c is specified as follows, in a cross-section through the projection welded joint that includes the centerline of the nut and that passes through the center of a bonded portion. If an end point on an inner peripheral surface side of the nut that is in contact with the steel plate is defined as A, an end point on an outer peripheral surface side thereof is defined as B, a plate thickness of the steel plate is defined as t (mm), points moved by 0.20 mm and 2/3t in a plate thickness direction of the steel plate from the point A are respectively defined as A1 and A2, and points moved by 0.20 mm and 2/3t in the plate thickness direction of the steel plate from the point B are respectively defined as B1 and B2, the inside of a rectangle formed by joining the point A1, the point B1, the point B2, and the point A2 is defined as the region c.
A metal-cored wire for submerged arc welding having a composition including, in mass %: C: 0.20 to 0.80%, Si: 0.15 to 0.90%, Mn: 17.0 to 28.0%, P: 0.030% or less, S: 0.030% or less, Ni: 0.01 to 10.00%, Cr: 0.4 to 4.0%, Mo: 3.50 to 10.00%, B: 0.0010% or less, N: 0.200% or less, and the balance being Fe and incidental impurities.
A method of predicting a tension-compression reverse loading behavior predicted by determining a model constant of a material model expressing the tension-compression reverse loading behavior of a metal sheet includes acquiring a value of the model constant of a prediction metal sheet by inputting metal materials test data, including a factor related to a uniaxial tension behavior, of the prediction metal sheet to a learned model that has been caused to perform machine learning using, as an input variable, metal materials test data of a learning metal sheet and using, as an output variable, a value of the model constant, which has been determined based on a tension-compression test of the learning metal sheet. The factor related to a uniaxial tension behavior includes point sequence data obtained by discretizing a stress-strain curve of uniaxial tensile test obtained from a uniaxial tensile test.
G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
Provided is a method for manufacturing a hot-dip metal-coated steel strip. The method includes continuously dipping a steel strip in a molten metal bath, injecting a gas from gas injection ports of paired gas wiping nozzles arranged on both front and back surface sides of the steel strip onto the steel strip pulled-up from the molten metal bath to adjust an adhesion amount of molten metal which adheres to both surfaces of the steel strip, and continuously manufacturing a hot-dip metal-coated steel strip, in which the paired gas wiping nozzles are operated under defined conditions.
Provided is a friction stir spot welded joint having high joint strength even in the case where a high strength steel sheet, particularly a steel sheet with a tensile strength (TS) of 980 MPa or more, is used as a material to be welded. An annular groove is formed on an upper surface of an upper sheet out of overlapping steel sheets, and a shape, microstructure, and hardness of a welded portion are appropriately controlled simultaneously.
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
Provided is a rotating tool for double-sided friction stir welding, the rotating tool making it possible to simultaneously suppress the occurrence of defects during welding, increase the welding speed, and improve the durability of the rotating tool. A tip end portion of the rotating tool is made of a material having a coefficient of dynamic friction of less than 0.30 and a Vickers hardness of 2500 HV or more.
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
85.
SHEARING METHOD, METHOD FOR MANUFACTURING METAL PRODUCT, AND SHEARING DEVICE
This shearing method for shearing a shearing object through use of a shearing blade (scrap shear 17) includes a determination step for determining whether the shearing object is larger than a shearable width of the shearing blade, a shearing width determination step for dividing the shearing object into a plurality of sections so that the width of the shearing object to be sheared at a time is equal to or less than the shearable width when it is determined that the shearing object is larger than the shearable width, and a shearing step for shearing the shearing object by performing a shearing for each of the plurality of divided sections.
B21B 15/00 - Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
B23D 31/02 - Shearing machines or shearing devices covered by none or more than one of the groups ; Combinations of shearing machines for performing different cutting operations on travelling stock, e.g. slitting and severing simultaneously
B23D 31/04 - Shearing machines or shearing devices covered by none or more than one of the groups ; Combinations of shearing machines for trimming stock combined with devices for shredding scrap
B23Q 17/20 - Arrangements for indicating or measuring on machine tools for indicating or measuring workpiece characteristics, e.g. contour, dimension, hardness
86.
METHOD FOR DETERMINING SLAB LENGTH AND CHARGING POSITION OF SLAB IN WALKING BEAM FURNACE
The method for determining slab length and charging position of the slab in a walking beam furnace determines the slab length and the charging position of the slab, so as to minimize an evaluation function that uses a constraint expression that specifies the probability of scab occurrence under a constraint condition, using a constraint expression that specifies the overhang amount, a constraint expression that specifies the scab occurrence probability corresponding to the overhang amount, and a constraint expression that specifies the upper and lower limit values of the slab length. The leading-edge overhang amount, which is the distance between the slab leading edge coordinate in the furnace and the second skid coordinate counting from the leading edge toward the tail edge, and the tail edge overhang amount, which is the distance between the slab tail edge coordinate in the furnace and the second skid coordinate counting from the tail edge toward the leading edge, are used as the overhang amounts.
Provided are a steel sheet dehydrogenation apparatus, a steel sheet production system, and a steel sheet production method capable of producing a steel sheet excellent in hydrogen embrittlement resistance without changing the mechanical properties of the steel sheet. A dehydrogenation apparatus comprises: a housing configured to house a steel sheet coil obtained by coiling a steel strip; and a vibration application device configured to apply vibration to the steel sheet coil housed in the housing so that the steel sheet coil is caused to vibrate at a frequency of 100 Hz to 100,000 Hz and a maximum amplitude of 10 nm to 500 μm.
A resistance spot welded joint is formed by resistance-spot-welding two or more steel sheets including at least one high strength steel sheet. The high strength steel sheet has a chemical composition containing, in mass %, C: 0.05 to 0.6%, Si: 0.1 to 2.0%, Mn: 1.5 to 4.0%, and P: 0.10% or less, with the balance being Fe and incidental impurities. The hardness of a softest nugget region is 90% or less of the hardness of the heat-affected zone. The softest nugget region has a microstructure including tempered martensite. The average number density of carbide particles having a diameter of 100 nm or more in the softest nugget region is 10 or more per 5 μm2 in a cross section of the steel sheets.
A steel sheet has a chemical composition containing a predetermined amount of C, Si, Mn, Cu, P, S, Al, and N, and optionally a predetermined amount of one or more selected from the group consisting of Ti, B, Nb, Cr, V, Mo, Ni, As, Sb, Sn, Ta, Ca, Mg, Zn, Co, Zr, and REM, with the balance being Fe and inevitable impurities; a microstructure comprising, in volume fraction, tempered martensite: 90% or more, retained austenite: 1% to 7%, one or both of bainitic ferrite and fresh martensite: 3% to 9% in total, and ferrite: 0% to 5%, where the retained austenite has a carbon concentration of 0.35% or more; a tensile strength TS of 1470 MPa to 1650 MPa, and a yield strength YS of 1100 MPa or more.
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
90.
METHOD FOR ESTIMATING BLENDED COAL COKE STRENGTH AFTER REACTION, METHOD FOR PRODUCING BLENDED COAL COKE, METHOD FOR OPERATING COKE OVEN, AND METHOD FOR CONTROLLING SINGLE COAL BLENDING RATIO
22 atmosphere is considered a TG reaction rate, the TG reaction rate of single coal coke is measured by thermogravimetric analysis and the TG reaction rate of blended coal coke is estimated on the basis of a weighted average value of the measured TG reaction rate of the single coal coke; a step in which a blended coal coke reactivity index (CRI) is estimated on the basis of the TG reaction rate of the blended coal coke estimated in the previous step; and a step in which a blended coal coke strength after reaction (CSR) is estimated on the basis of the blended coal coke reactivity index (CRI) estimated in the previous step and the strength (DI) of the blended coal coke.
In this method for determining a slab length and a slab charging position within a walking-beam heating furnace: the length of a slab and the charging position of the slab in heating furnace units are determined so as to minimize a first assessment function under a first limiting condition; the charging position of the slab in heating furnace units is also determined so as to minimize a second assessment function under a second limiting condition; and as overhang quantities, used are a leading end overhang quantity, which is the distance between the coordinates of the leading end of the slab within the heating furnace and the coordinates of a second skid as counted from the leading end toward the trailing end, and a trailing end overhang quantity, which is the distance between the coordinates of the trailing end of the slab within the heating furnace and the coordinates of a second skid as counted from the trailing end toward the leading end.
Provided is an iron-based powder for supplying iron ions that achieves an improvement in the growth of a plant (crop) due to the dissolving of divalent iron ions as well as an increase in the yield of the obtained crop through this improvement. In the diffraction peak of X-ray diffraction using a Cu-Kα ray of an iron-based powder constituting the iron-based powder for supplying iron ions, the full width at half maximum of the rocking curve corresponding to the (110) diffraction plane of the α-Fe crystal is in the range of 0.03° to 3.00°.
B22F 1/00 - Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
B22F 1/052 - Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
C05D 9/02 - Other inorganic fertilisers containing trace elements
C05G 5/10 - Solid or semi-solid fertilisers, e.g. powders
Provided is an iron-based powder for supplying iron ions that achieves an improvement in the growth of a plant (crop) due to the dissolving of divalent iron ions as well as an increase in the yield of the obtained crop through this improvement. In the diffraction peak of X-ray diffraction of an iron-based powder constituting the iron-based powder for supplying iron ions, the lattice spacing obtained from the rocking curve corresponding to the (110) diffraction plane of the α-Fe crystal is in the range of 2.000 Å to 2.100 Å.
A method for recovering a valuable element, by which method metal with a high proportion of a valuable element can be obtained. The method includes adding a reductant to an oxide containing at least one element selected from the group consisting of nickel and cobalt, followed by heating, to thereby reduce the oxide, the reductant contains at least one selected from the group consisting of metallic iron and an iron oxide, and an addition amount of the reductant is 1.3 equivalent or less.
A method for diagnosing the soundness of a current transformer according to the present invention includes: correcting a first measurement value indicating the amount of moisture inside a first current transformer, a second measurement value indicating the amount of moisture inside a second current transformer, and a third measurement value indicating the amount of moisture inside a third current transformer, the measurement values being measured by a neutron moisture meter, and the correction being carried out at a preset attenuation rate in accordance with the distance between an outer surface of a tank of the current transformers and the neutron moisture meter; and, in cases where the difference between the corrected third measurement value and an average value of the corrected first measurement value and the corrected second measurement value exceeds a preset threshold value when the corrected first measured value, the corrected second measured value, and the corrected third measured value indicate decreasing amounts of moisture in the stated order, identifying that there is a possibility that at least an abnormality has occurred in the current transformer corresponding to the corrected third measurement value.
H01F 41/00 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
H01F 27/00 - MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - Details of transformers or inductances, in general
A non-oriented electromagnetic steel sheet that is effective in reducing noise and vibration in electric motors, that has a component composition including, in mass%, 0.0050% or less of C, 2.0-5.0% of Si, 2.0% or less of Mn, 0.20% or less of P, 0.0050% or less of S, 2.0% or less of Al, 0.0050% or less of N, 0.0030% or less of Ti, 0.0010% or less of Nb, 0.0050% or less of V, and 0.0050% or less of O, and in which when the rolling direction (RD) in the rolling plane of the steel plate, the plate width direction (TD), and a direction (DDm⊥H⊥H RD⊥H⊥H TD⊥H⊥H DD⊥H⊥H aveof the magnetostriction is 5 × 10-6 or less.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
H01F 1/147 - Alloys characterised by their composition
H02K 1/02 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit characterised by the magnetic material
97.
METHOD FOR PREDICTING CROSS-SECTIONAL DIMENSION OF SHAPE STEEL, METHOD FOR MANUFACTURING SHAPE STEEL, CROSS-SECTIONAL DIMENSION PREDICTION DEVICE FOR SHAPE STEEL, AND METHOD FOR GENERATING CROSS-SECTIONAL DIMENSION PREDICTION MODEL
Provided is a method for predicting a cross-sectional dimension of a shape steel, the method being applicable to shape steels having various cross-sectional dimensions without being limited to a preceding rolled material and succeeding rolled material continuously hot-rolled, as long as the shape steel is manufactured by hot-rolling with the same roll set. Provided is a cross-sectional dimension prediction method of a shape steel for predicting a cross-sectional dimension for a shape steel manufactured by hot-rolling, wherein the method involves: outputting the difference between cross-sectional dimension deviations by inputting, to a cross-sectional dimension prediction model which uses, as an input, the difference between rolling operation parameters of two shape steels manufactured by hot-rolling with the same roll set and uses, as an output, the difference between cross-sectional dimension deviations of the two shape steels, the difference between rolling operation parameters of a shape steel to be a preceding material manufactured by hot-rolling with the roll set and rolling operation parameters of a shape steel to be manufactured by hot-rolling with the roll set, the cross-sectional dimension deviations being deviations between target dimensions and actual dimensions of the shape steels; and using the output difference between the cross-sectional dimension deviations and the cross-sectional dimension of the shape steel to be the preceding material to predict the cross-sectional dimension of a shape steel to be manufactured.
QUENCHING APPARATUS FOR METAL SHEET, CONTINUOUS ANNEALING EQUIPMENT, METHOD FOR QUENCHING METAL SHEET, METHOD FOR MANUFACTURING COLD ROLLED STEEL SHEET, AND METHOD FOR MANUFACTURING COATED STEEL SHEET
A quenching apparatus for a metal sheet, continuous annealing equipment, a method for quenching a metal sheet, a method for manufacturing a cold rolled steel sheet, and a method for manufacturing a coated steel sheet. The quenching apparatus has a water tank in which the metal sheet is passed and immersed in a liquid to cool the metal sheet, a water injection apparatus placed in the water tank, and plural restraining roll pairs with which the metal sheet that is passed in the water tank is restrained. The water injection apparatus has plural water injection nozzles arranged in a sheet passing direction of the metal sheet on front and back surface sides of the metal sheet. A position of each of the plural restraining roll pairs is separately adjusted with respect to the metal sheet in accordance with operation conditions.
Provided is an iron-based soft magnetic powder that may be used in producing a dust core having a low iron loss. The iron-based soft magnetic powder has a crystallinity of 10% or less, volume-based median circularity (C50) of 0.85 or more, and when heated to 400° C. at a heating rate of 3° C./min and held at 400° C. for 20 min in a nitrogen atmosphere, then allowed to naturally cool to room temperature, number density of Cu clusters in the powder of 1.00×103/μm3 or more and 1.00×106/m3 or less, and average Cu concentration of the Cu clusters of 30.0 at % or more.
B22F 1/102 - Metallic powder coated with organic material
H01F 1/26 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated by macromolecular organic substances
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
100.
MOLTEN Al-Zn-BASED PLATED STEEL SHEET AND METHOD FOR MANUFACTURING SAME
