An electrical steel sheet includes an annular body. At least one of a plurality of adhesion layers (41) is a first adhesion layer. In one of two electrical steel sheets sandwiching the first adhesion layer in a stacking direction, when an imaginary axis intersecting with a central axis of the annular body and extending in an easy-magnetization direction is defined as an L-axis, an imaginary axis intersecting with the central axis and intersecting with the L-axis is defined as a C-axis, and the electrical steel sheet is partitioned into a plurality of sections (S) in a circumferential direction of the annular body by the L-axis and the C-axis, at least one of the plurality of sections (S) is a first section. In the first section, an area of the first adhesion layer in a first portion (P1) of the electrical steel sheet where a main magnetic flux is generated in the L-axis direction is smaller than an area of the first adhesion layer in a second portion (P2) of the electrical steel sheet where the main magnetic flux is generated in the C-axis direction.
In a rotor core cross section, positions of open-end front-side corner portions (1131a, 1131c) are on a rear side in a rotation direction of a rotor core (811) further than reference positions (831a, 831b).
A welded rail having excellent fatigue damage resistance and breakage resistance of a welded joint portion according to an aspect of the present invention includes: a plurality of rail portions; and a welded joint portion joining the rail portions, in which a HAZ width (W) is 60 mm or less, and when an interval between a most softened portion and a welding center measured along a longitudinal direction is defined as WX and a region where the distance from the welding center is 0.6 WX to 0.7 WX and the depth from a top portion outer surface is 2 to 5 mm is defined as a pro-eutectoid cementite structure evaluation region, in the pro-eutectoid cementite structure evaluation region, a total number of intersections (N) of a pro-eutectoid cementite structure intersecting a cross line including two line segments having a length of 100 ?m parallel to the longitudinal direction and the vertical direction is 26 or less.
Provided is a girth welded joint of steel pipe 10 including base metal portions 1a, 1b and a girth welded portion 2, wherein the girth welded portion 2 is formed of a weld metal portion 2a and weld heat affected zones 2b, 2c, the base metal portions 1a, 1b have a predetermined chemical composition, Pcm is within a range of 0.25 to 0.30, the weld metal portion 2a has a predetermined chemical composition, a content of B is 0.0010% or less, each of tensile strength of the base metal portions 1a, 1b and tensile strength of the girth welded portion 2 in a cross weld tensile test is 980 MPa or more, average hardness of the base metal portions 1a, 1b is 300 HV10 or more, an average softening width of the weld heat affected zones 2b, 2c is 4.0 mm or less, and an average softening degree is 80 HV10 or less.
A plated steel sheet comprises a plated layer on a surface of a steel sheet, in which in the plated layer, the total amount ?A of Sn, Bi, and In is less than 0.75%, the total amount ?B of Ca, Y, La, and Ce is 0.03 to 0.60%, the total amount ?C of Cr, Ti, Ni, Co, V, Nb, Cu, and Mn is 0 to 1.00%, Sn ? Si, and 20.0 ? Mg/Si are satisfied, and in an X-ray diffraction pattern of a surface of the plated layer, an X-ray diffraction peak of Al2.15Zn1.85Ca, an X-ray diffraction peak of CaZn2, and an X-ray diffraction peak of ?'-MgZn2 satisfy a predetermined relationship.
A wheel (100) includes a boss (10), a rim (20), and a web (30). The rim (20) includes a tread (21) and a flange (22). A center (Cb) of the boss (10) in an axial direction of the wheel (100) is disposed closer to the flange (22) than a center (Cr) of the rim (20) in the axial direction. The web (30) has a plate-thickness center line (A) having a linear shape when the wheel (100) is viewed in a longitudinal section. In a case where an angle formed by the plate-thickness center line (A) with the axial direction is taken as ?, a distance in the axial direction from a side face (24) of the rim (20) to an outer end (Aa) of the plate-thickness center line (A) is taken as Pw, a length of the rim (20) in the axial direction is taken as Wr, and Pw/Wr is taken as L, the wheel (100) satisfies L ? 0.053? - 3.8626, where the angle ? is 90? or less.
An oil-well metal pipe according to the present disclosure can be fastened with high torque. An oil-well metal pipe (1) according to the present disclosure includes a resin coating (100) on or above at least one of a pin contact surface (400) and a box contact surface (500). The resin coating (100) contains: an epoxy resin: 40.0 to 97.0 mass%; a magnesium silicate hydroxide powder: 3.0 to 50.0 mass%; TiO2: 0 to 10.0 mass%; a wax: 0 to 10.0 mass%; a fluorine-based additive: 0 to 20.0 mass%; and graphite: 0 to 10.0 mass%; and satisfies Formula (1):(CW+CF+CG)/(CMg+CTiO2+CSi) ? 0.28 (1)where, in Formula (1), a content in mass% of the wax is substituted for CW, a content in mass% of the fluorine-based additive is substituted for CF, a content in mass% of the graphite is substituted for CG, a content in mass% of the magnesium silicate hydroxide powder is substituted for CMg, a content in mass% of the TiO2 is substituted for CTiO2, and a content in mass% of the silane coupling agent is substituted for CSi.
An oil-well metal pipe according to the present disclosure has a high shear strength. An oil-well metal pipe according to the present disclosure includes a resin coating (100) on or above at least one of a pin contact surface (400) and a box contact surface (500). The resin coating (100) contains: a resin: 50.0 to 99.5 mass%, a wax: 0 to 10.0 mass%, a fluorine-based additive: 0 to 30.0 mass%, graphite: 0 to 10.0 mass%, a rust preventive pigment: 0 to 30.0 mass%, a coloring pigment: 0 to 10.0 mass%, a coupling agent: 0 to 10.0 mass%, and one type or two types selected from a group consisting of a magnesium silicate hydroxide powder: 1.5 to 50.0 mass% and TiO2: 0.5 to 30.0 mass%; and satisfies Formula (1).(W+F+G)/(M+T) ? 5.00 (1)
A method for producing direct reduction iron includes a reduction step in which an iron oxide raw material is reduced by a reducing gas containing hydrogen gas to generate direct reduction iron; a dehydration step in which water is removed from an exhaust gas in the reduction step and thus hydrogen gas is separated from the exhaust gas; a cooling step in which the direct reduction iron is carbonized and cooled using a cooling gas containing carbon as an element; and a separation step in which hydrogen gas and methane gas are separated from an exhaust gas in the cooling step, wherein the cooling gas is methane gas, wherein the reducing gas further contains the hydrogen gas separated in the dehydration step and the hydrogen gas separated in the separation step, and wherein the cooling gas further contains the methane gas separated in the separation step.
A duplex stainless steel material that has excellent general corrosion resistance and pitting resistance in a supercritical corrosive environment in which SOX gas and O2 gas are contained in a supercritical CO2 gas is provided. A duplex stainless steel material of the present disclosure has the chemical composition described in the description, and in the duplex stainless steel material, on a precondition that the content of each element is within a range described in the description, Fn defined by Formula (1) is 57.0 or more, and a total number per 1 mm2 of Mn sulfides having an equivalent circular diameter of 1.0 ?m or more and Ca sulfides having an equivalent circular diameter of 2.0 ?m or more is 0.50 /mm2 or less.Fn = Cr+3.3(Mo+0.5W)+16N+2Ni+Cu+2Co+10Sn...(1)Where, the content in mass% of a corresponding element is substituted for each symbol of an element in Formula (1).
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 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
11.
THREADED END OF A TUBULAR COMPONENT PROVIDED WITH A COATING COMPRISING A ZINC-CHROMIUM ALLOY
The present invention relates in particular to a threaded end 1, 2 of a tubular component for drilling and/or exploiting a hydrocarbon well, transporting oil and gas, transporting or storing hydrogen, carbon capture or geothermy, comprising at least one thread 3, 4 extending on its outer or inner peripheral surface, the thread of which is coated with a layer 15 comprising a zinc-chromium (Zn-Cr) alloy, the zinc (Zn) of which is the predominant element by weight, relative to the total weight of the alloy. The present invention also relates to a method for preparing a threaded end 1, 2, as defined above, of a tubular component intended for drilling and/or exploiting a hydrocarbon well, transporting oil and gas, transporting or storing hydrogen, carbon capture or geothermy, comprising at least one electrolytic deposition, on the surface of the thread 3, 4 of the end, of an aqueous composition comprising one or more zinc salts, one or more chromium salts, one or more electrolytes and one or more surfactants.
The wound core of the present invention has at least one arbitrary bent region 5A, in a plurality of corner portions (3), in which the corner portion (3) bulges outward to confine the magnetic flux flowing in the wound core so that the angle ? formed by the straight line PQ and the straight line PR satisfies 23° ? ? ? 50°.
A duplex stainless steel material that has excellent general corrosion resistance and pitting resistance in a supercritical corrosive environment in which SOX gas and O2 gas are contained in a supercritical CO2 gas is provided. A duplex stainless steel material of the present disclosure has the chemical composition described in the description, and in the duplex stainless steel material, on a precondition that the content of each element is within a range described in the description, Fn defined by Formula (1) is 44.0 or more, and a total number per 1 mm2 of Mn sulfides having an equivalent circular diameter of 1.0 ?m or more and Ca sulfides having an equivalent circular diameter of 2.0 ?m or more is 0.50 /mm2 or less.Fn = Cr+3.3(Mo+0.5W)+16N+2Ni+Cu+2Co+10Sn...(1)Where, the content in mass% of a corresponding element is substituted for each symbol of an element in Formula (1).
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 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
In this molten pig iron manufacturing method, using a fixed-type DC electric furnace, an auxiliary raw material is supplied to the fixed-type DC electric furnace and molten pig iron having a C concentration of 2 to 4 mass% at a temperature of 1400°C to 1550°C is tapped from a tap hole in a state in which a solid iron source is present in the furnace inner peripheral wall space and in a state in which the solid iron source is not present in the upper electrode facing space.
This ironmaking method includes an ore beneficiation step in which a high combined water content iron ore having a loss of ignition of 3 to 12 mass% is beneficiated into a goethite-rich part having at least a loss of ignition of 4 mass% or more and an iron content of 55 mass% or more; a first agglomeration processing step in which the goethite-rich part is agglomerated into first fired pellets in a pellet induration furnace; and a first reduction step in which the first fired pellets are charged into a shaft furnace while the first fired pellets have a surface temperature of 600? or higher, and directly reduced using a reducing gas containing 60 volume% or more of hydrogen.
There is provided an agglomerated ore that is a molded product obtained by mixing a plurality of types of particles, in which the plurality of types of particles include at least iron carbide particles and iron oxide particles, in which at least some of the iron oxide particles are exposed on a surface layer of the agglomerated ore, in which the porosity of the agglomerated ore is 20% or more and 40% or less, in which the ratio of the total mass of metallic iron and iron in iron carbide to the mass of total iron contained in the agglomerated ore is 40 mass% or more and 80 mass% or less, and in which the concentration of carbon including carbon in the iron carbide particles is 1.0 mass% or more and 4.5 mass% or less.
A threaded tubular element (1, 2) for use in drilling, operating hydrocarbon wells, transporting petroleum and gas, transporting or storing hydrogen, carbon capture or in the field of geothermal energy, comprising a metal body (5) and at least one threaded end (3, 4) comprising at least one threaded portion (14,15), the threaded end (3, 4) comprising a multilayer coating (10) on at least one portion of the surface of the threaded end (3, 4), characterised in that the multilayer coating (10) comprises a first layer (11) comprising a solid zinc-nickel coating electrodeposited onto the at least one portion of the surface of the threaded end (3, 4), a second oxalate conversion layer (12) above the first layer (11), a third layer (13) comprising a polyurethane matrix or an epoxy matrix filled with solid lubricating particles above the second layer (12).
A hot-dip plated steel according to one aspect of the present invention includes a base steel and a hot-dip plating layer disposed on a surface of the base steel, a chemical composition of the hot-dip plating layer contains, by mass%, Al: 10.00% to 30.00%, Mg: 3.00% to 12.00%, Sn: 0% to 2.00%, Si: 0% to 2.50%, Ca: 0% to 3.00%, Ni: 0% or more and less than 0.25%, Fe: 0% to 5.00%, and the like, a remainder consists of Zn and impurities, a metallographic structure of the hot-dip plating layer contains 5 to 45 area% of an ? phase having a grain diameter of 0.5 to 2 ?m, the metallographic structure of the hot-dip plating layer contains 15 to 70 area% of a MgZn2 phase, and, among the ? phases having the grain diameter of 0.5 to 2 ?m, an area ratio of an ? phase having a (111)?//(0001)MgZn2 orientation relationship to the adjacent MgZn2 phase is 25% to 100%.
An oil-well metal pipe including a Zn-Ni alloy plating layer that has high adhesion is provided. An oil-well metal pipe according to the present disclosure includes: a pipe main body that includes a pin which includes a pin contact surface including an external thread part and which is formed at a first end portion, and a box which includes a box contact surface including an internal thread part and which is formed at a second end portion; and a Zn-Ni alloy plating layer which is formed on at least one of the pin contact surface and the box contact surface. The X-ray diffraction intensities of the Zn-Ni alloy plating layer satisfy Formula (1).I18/(I18+I36+I54)?0.60 (1)Here, in Formula (1), in units of cps, an X-ray diffraction intensity of {411} and {330} is substituted for I18, an X-ray diffraction intensity of {442} and {600} is substituted for I36, and an X-ray diffraction intensity of {552} is substituted for I54.
A plated steel including a plated layer on a surface of a steel, in which Expression 1 of 0 <= Cr+Ti+Ni+Co+V+Nb+Cu+Mn <= 0.25 and Expression 2 of 0 <= Sr+Sb+Pb+B+Li+Zr+Mo+W+Ag+P <= 0.50 are satisfied, and Expression 3 of I(MgZn2 (41.31°))/I(SUM(MgZn2)) <= 0.265 and Expression 6 of 0.150 <= {I(MgZn2 (20.79°))+I(MgZn2 (42.24°))}/I(SUM(MgZn2)) are further satisfied in an X-ray diffraction pattern of a surface of the plated layer measured using Cu-K.alpha. rays under a condition that an X-ray output is 40 kV and 150 mA.
C23C 2/06 - Zinc or cadmium or alloys based thereon
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
21.
ADHESIVE COMPOSITION FOR LAMINATING ELECTROMAGNETIC STEEL SHEET
The object of the present invention is to provide an adhesive composition for laminating an electromagnetic steel sheet, which has excellent tack-free properties before preparation of a laminated electromagnetic steel sheet, has excellent adhesive performance even after long-term storage, and provides an adhesive cured product having excellent toughness over a wide temperature range. The present invention is an adhesive composition for laminating an electromagnetic steel sheet, including an epoxy resin (AA) containing an epoxy resin (A) having equal to or more than 3 epoxy groups in one molecule, a phenoxy resin (B) having a glass transition temperature exceeding 120°C in an uncured state in differential scanning calorimetry, and an amine-based latent curing agent (C), wherein the epoxy resin (A) contains an epoxy resin having a softening temperature equal to or higher than 60°C, a content of the phenoxy resin (B) is 20 to 80 parts by mass based on 100 parts by mass of the epoxy resin (AA), and a glass transition temperature of the resulting adhesive cured product in differential scanning calorimetry exceeds 160°C.
The invention relates to a connection device (1) comprising a first tubular element (3), a second tubular element (2) and a coupling sleeve (4) for connecting the first tubular element (3) to the second tubular element (2); the first male portion (6) of the first tubular element (3) comprising a free end which comprises an annular sealing lip (16), the sealing lip (16) being configured to cover an outer sealing surface (14) of the second tubular element (2), the sealing lip (16) having an outer periphery (17) on which an outer thread (12) is formed.
A threaded connection comprising: a first tubular component (1) having a first male threaded portion (16) and a second male threaded portion (17), a root width in the first male threaded portion (16) decreasing in a direction oriented a first pipe body (3), the root width being constant in the second male threaded portion (17), the second tubular component (2) comprising a female threaded zone (10) having a first female threaded portion (19) with a root width decreasing in a direction oriented towards a second pipe body (5), the connection being partially made up in a self-locking arrangement in order to provide a locking region (18) and a non-locking region (20), a female distal thread (22) of the locking region (18) has a width such that FDTW/TH >= 125%, in which FDTW is a tooth width of the female distal thread (22) of the locking region and TH is the tooth height of said female distal thread (22).
The present invention has as its object the provision of an Fe-based amorphous alloy and Fe-based amorphous alloy ribbon excellent in soft magnetic properties having a low iron loss and a high saturation magnetic flux density. The Fe-based amorphous alloy excellent in soft magnetic properties of the present invention comprises, by atom%, B: 8.0% or more and 18.0% or less, Si: 2.0% or more and 9.0% or less, C: 0.10% or more and 5.00% or less, Al: 0.005% or more and 1.50% or less, P: 0% or more and less than 1.00%, Mn: 0% or more and 0.30% or less, Fe: 78.00% or more and 86.00% or less, and balance: impurities and has an amorphous structure.
C22C 45/02 - Amorphous alloys with iron as the major constituent
H01F 1/153 - Amorphous metallic alloys, e.g. glassy metals
H01F 1/16 - 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 sheets
An oil-well steel pipe including a Zn-Ni alloy plating layer that has excellent galling resistance is provided. An oil-well steel pipe according to the present disclosure includes: a pipe main body that includes a pin which includes a pin contact surface, and a box which includes a box contact surface; and a Zn-Ni alloy plating layer which is formed on at least one of the pin contact surface and the box contact surface. The chemical composition of the pipe main body contains, in mass%, C: 0.01 to 0.60%, Cr: 0 to 8.0% and Fe: 80.0% or more. In addition, when a region containing C in an amount that, in mass%, is 1.5 times or more greater than the C content of the pipe main body is defined as a C-concentrated layer, the thickness of the C-concentrated layer in the wall thickness direction of the pipe main body is within the range of 0 to 1.50 ?m.
F16L 15/04 - Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
26.
OIL WELL STEEL PIPE WITH THREADED CONNECTION, METHOD FOR PRODUCING OIL WELL STEEL PIPES CONNECTED BODY USING OIL WELL STEEL PIPE WITH THREADED CONNECTION, AND METHOD FOR PRODUCING OIL WELL STEEL PIPE WITH THREADED CONNECTIO
This invention provides an oil well steel pipe with a threaded connection with which excellent galling resistance is obtained without using a compound grease, and which can suppress the occurrence of rust on a pin contact surface and can also keep shouldering torque at a low level. An oil well steel pipe with a threaded connection of the present disclosure includes a pipe main body 10 including a first end portion 10A and a second end portion 10B. The pipe main body 10 includes a pin 40 formed at the first end portion 10A, and a box 50 formed at the second end portion 10B. A light oil 80 is applied to a pin contact surface 400 of the pin 40. A solid lubricant coating 60 is formed on a box contact surface 500 of the box 50.
A railway wheel that is excellent in toughness at a hub part is provided. A railway wheel according to the present disclosure includes a rim part, a hub part having a through hole, and a web part. A chemical composition of the railway wheel consists of, in mass%, C: 0.60 to 0.80%, Si: 1.00% or less, Mn: 0.10 to 1.50%, P: 0.050% or less, S: 0.030% or less, and N: 0.0200% or less, with the balance being Fe and impurities. In a cross section of the hub part obtained when the hub part is cut in a central axis direction of the through hole along a plane including a central axis, when regions of 15 mm ? 15 mm defined by a plurality of axial line segments parallel to the central axis and arranged at a pitch of 15 mm in a radial direction of the railway wheel from an inner peripheral surface of the through hole, and by a plurality of radial line segments perpendicular to the central axis and arranged at a pitch of 15 mm in the central axis direction from a surface of the hub part in which an opening of the through hole is formed are defined as rectangular regions, the average C concentration in each rectangular region in the cross section of the hub part is less than 0.90% by mass.
This electrical steel sheet contains: as a chemical composition, in a unit of mass%, 2.5% to 3.9% of Si; 0.001% to 3.0% of Al; and 0.05% to 5.0% of Mn, the remainder being Fe and impurities, and, on one surface or both surfaces thereof, an insulating coating containing a curing accelerator is formed.
H01F 1/147 - Alloys characterised by their composition
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
H02K 1/02 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit characterised by the magnetic material
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
29.
BONDED AND STACKED CORE MANUFACTURING METHOD AND BONDED AND STACKED CORE MANUFACTURING APPARATUS
This bonded and stacked core manufacturing method is for manufacturing a bonded and stacked core by performing press working on a strip-shaped steel sheet with a press working oil applied to one surface or both surfaces thereof, applying an adhesive to one surface of the strip-shaped steel sheet to obtain a plurality of steel sheet components, and stacking and bonding the steel sheet components, in which a curing accelerator having an average viscosity of 0.01 Pa?s to 100 Pa?s is applied to one surface or both surfaces of the strip-shaped steel sheet before the press working oil is applied.
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
30.
BONDED AND STACKED CORE MANUFACTURING METHOD AND BONDED AND STACKED CORE MANUFACTURING APPARATUS
This bonded and stacked core manufacturing method is a method for manufacturing a bonded and stacked core by performing press working on a strip-shaped steel sheet with a press working oil applied to one surface or both surfaces thereof, applying an anaerobic adhesive and an instantaneous adhesive to one surface of the strip-shaped steel sheet to obtain a plurality of steel sheet components, and stacking and bonding the steel sheet components, in which a curing accelerating layer is formed by applying an anaerobic adhesive curing accelerator and an instantaneous adhesive curing accelerator to one surface or both surfaces of the strip-shaped steel sheet before the press working oil is applied, and drying the adhesive curing accelerator and the instantaneous adhesive curing accelerator.
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
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
H02K 15/12 - Impregnating, heating or drying of windings, stators, rotors or machines
Provided is a Zn-Al-Mg alloy coated checkered steel sheet having on the sheet surface thereof convex part and flat part, wherein: the coating layer has a predetermined chemical composition, and when observing a cross section of cutting edge orthogonal to a longitudinal direction of the convex part and taken along a sheet thickness direction at a central part in the longitudinal direction of the convex part, a layer thickness ratio of the coating layer of the flat part on left and right of the convex part (layer thickness of left coating layer/layer thickness of right coating layer) is from 0.2 to 5.0, and a convex height T-t, where T is a sheet thickness of the substrate checkered steel sheet at the convex part and t is a sheet thickness of the substrate checkered steel sheet at the flat part, and a gap height x between a stationary surface and a sheet surface of the coated checkered steel sheet opposite to the stationary surface in a case in which the coated checkered steel sheet is placed in a stationary position satisfy the following Formulas 1 and 2 below.Formula 1: x/(T - t) ? 1.5Formula 2: 0.5 < T - t ? t
C22C 18/04 - Alloys based on zinc with aluminium as the next major constituent
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
C23C 2/06 - Zinc or cadmium or alloys based thereon
C23C 2/28 - Thermal after-treatment, e.g. treatment in oil bath
32.
ROTATING ELECTRICAL MACHINE, STATOR CORE AND ROTOR CORE SET, METHOD FOR MANUFACTURING ROTATING ELECTRICAL MACHINE, METHOD FOR MANUFACTURING NON-ORIENTED ELECTRICAL STEEL SHEET, METHOD FOR MANUFACTURING ROTOR AND STATOR OF ROTATING ELECTRICAL MACHINE, AND NON-ORIENTED ELECTRICAL STEEL SHEET SET
A rotating electrical machine includes a stator, a rotor, and a casing that accommodates the stator and the rotor, in which a {111}<211> orientation intensity (A) of a core material of the stator is in a range of 2 to 30, a {111}<211> orientation intensity (B) of a core material of the rotor is in a range of 1 to 15, and both the orientation intensities satisfy a relationship of an expression (1) A > B.
A rotor core has plural holes including holes in which permanent magnets are installed, the rotor core including: a high permeability portion; and a low permeability portion having a relative permeability that is smaller than a relative permeability of the high permeability portion and that is greater than a relative permeability of a vacuum, wherein an entirety of an inner peripheral bridge portion, at least part of a region of which is disposed at an inner peripheral surface side of the rotor core relative to at least one of regions where the permanent magnets are installed, is the low permeability portion.
H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
34.
ROTATING ELECTRICAL MACHINE, STATOR CORE AND ROTOR CORE SET, METHOD FOR MANUFACTURING ROTATING ELECTRICAL MACHINE, METHOD FOR MANUFACTURING NON-ORIENTED ELECTRICAL STEEL SHEET FOR STATOR AND NON-ORIENTED ELECTRICAL STEEL SHEET FOR ROTOR, METHOD FOR MANUFACTURING STATOR AND ROTOR, AND NON-ORIENTED ELECTRICAL STEEL SHEET SE
The rotating electrical machine includes a stator, a rotor, and a casing that accommodates the stator and the rotor, in which at least one of the following conditions 1 and 2 is satisfied.Condition 1: a thermal conductivity A of a non-oriented electrical steel sheet that is used for a core of the stator is in a range of 12 to 35 W/(m·K), a thermal conductivity B of a non-oriented electrical steel sheet that is used for a core of the rotor is in a range of 10 to 33 W/(m·K), and both the thermal conductivities have a relationship of an expression (1) of A > BCondition 2: a thermal diffusivity A1 of the non-oriented electrical steel sheet that is used for the core of the stator is in a range of 3.0 × 10?6 to 9.0 × 10?6 m2/sW/(m·K), a thermal diffusivity B1 of the non-oriented electrical steel sheet that is used for the core of the rotor is in a range of 2.5 × 10?6 to 8.5 × 10?6 m2/sW/(m·K), and both the thermal diffusivities have a relationship of an expression (3) of A1 > B1
A rotor core includes plural holes in which permanent magnets are installed, wherein: in a cross-section of the rotor core perpendicular to a rotational axis, at least one of the plural holes includes a first end portion positioned on a leading side in a rotational direction in a left and right direction, which is a direction on both left and right sides relative to a direction of magnetization of the permanent magnet, and a second end portion positioned on a trailing side in the rotational direction in the left and right direction; the first end portion is open to an outer peripheral surface of the rotor core, and a circumferential direction length of the opening is longer than a circumferential direction length of the second end portion; in the cross-section, the hole in which the first end portion is open has an inner space whose width direction length is equal to a length corresponding to the length of the permanent magnet in the direction of magnetization and a first outer space that communicates with the inner space, has the first end portion as one end portion of the hole in the left and right direction, and is wider than the inner space; and the first end portion is disposed off-center on the trailing side in the rotational direction relative to a circumferential direction center position of the inner space at the position where the inner space communicates with the first outer space.
The invention relates to a tubular threaded seal (1) for drilling, the exploitation of hydrocarbon wells, the transport of petroleum and gas, carbon capture or geothermal energy, comprising a male tubular element (2) and a female tubular element (3), each of said male tubular element (2) and female tubular element (3) respectively comprising a male threaded portion (4) and a female threaded portion (5). Either the male threaded portion (4) or female threaded portion (5) optionally comprises a solid anti-corrosion and/or lubricating coating (10), said male threaded portion (4) and female threaded portion (5) respectively comprising at least one male thread tooth (6) or one female thread tooth (5) and a thread axial clearance TAG (8) providing a space, in the installed state, between an engagement flank (14) of said male thread tooth and a bearing flank (15) of said female thread tooth (7), characterised in that said thread axial clearance TAG (8) is greater than or equal to a minimum clearance TAGmin.
This surface-treated steel includes surface-treated steel comprising:a steel sheet;a plated layer including zinc formed on the steel sheet; anda film formed on the plated layer,wherein the film has a thickness of 100 nm or more and 1000 nm or less,wherein the film includes:an amorphous phase A containing Si, C, O, P, Zn, and V, and one or two or more kinds selected from the group consisting of Ti, Zr, and Al as constituent elements, wherein Zn/Si, which is a peak intensity ratio between Zn and Si, is 1.0 or more, and V/P, which is a mass ratio between V and P, is 0.050 to 1.000 when analysis is performed by EDS; andan amorphous phase B containing Si, O, and Zn, wherein the amorphous phase B has a Zn/Si ratio of less than 1.0, the Zn/Si ratio is a peak intensity ratio between Zn and Si when analysis is performed by EDS,a Zn content of the amorphous phase A is 10 mass% or less, andin a cross section in a thickness direction, a percentage of a length of an interface between the plated layer and the amorphous phase B to a length of an interface between the plated layer and the film is 30% or more.
B32B 15/04 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance
C22C 18/04 - Alloys based on zinc with aluminium as the next major constituent
C23C 22/05 - 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 using aqueous solutions
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
A plated steel material having a plating layer having an average chemical composition containing, in mass%, Zn: more than 50.00%, Al: more than 15.0% and less than 30.0%, Mg: more than 5.0% and less than 15.0%, and Si: 0.25% or more and less than 3.50%, and impurities, and wherein a total amount (?A) of at least one selected from the group consisting of Sn, Bi and In is less than 1.00%, a total amount (?B) of at least one selected from the group consisting of Ca, Y, La, Ce and Sr is 0.02% or more and less than 0.60%, 2.0?Mg/Si<20.0 (Formula 1), 3.0?Si/?B<24.0 (Formula 2), and 26.0?(Si/?B)×(Mg/Si)<375.0 (Formula 3) are satisfied, and in an X-ray diffraction pattern of the surface of the plating layer, a diffraction intensity ratio R1 defined by R1={I(16.18°)+I(32.69°)}/I(27.0°) (Formula 4) satisfies 2.5
The plated steel material is a plated steel material including a steel material and a plating layer provided on the surface of the steel material, wherein the plating layer has a predetermined average chemical composition, when the amount of Mg is %Mg and the amount of Al is %Al, %Mg/%Al is 0.80 or more, and a metal structure in a total field of view of 25,000 ?m2 in a vertical cross section which is a cross section in a thickness direction of the plating layer includes 10 to 40 area% of a MgZn2 phase, 10 to 30 area% of an Al-Zn phase with a Zn content of 10% or more, 0 to 15 area% of an Al phase with a Zn content of less than 10%, and 25 area% or more of an Al/MgZn2/Zn ternary eutectic structure.
IIn this method of producing a wound core, at least one bent portion (5) of one or more laminated grain oriented electrical steel sheets (1) is formed such that one side (1b) of the steel sheet (1) is placed and constrained on a die (30) and a punch (40) is press formed against a portion (1a) of the steel sheet (1) to be bent on the other free end side in the thickness (T) direction of the steel sheet. Outer surfaces of the die and the punch each have an arc portion (30a, 40a) having a predetermined curvature, and when the thickness of the steel sheet (1) is T, bent angles of the bent portions (5) are ?(°), a radius of curvature of the arc portion (30a) of the die is Rd, and a radius of curvature of the arc portion (40a) of the punch is Rp, relationships of Equations (1) to (5) below are satisfied.0.02?T/(2Rd+T)?0.15 ? (1)0.5?Rd?3.0 ? (2)0.15?T?0.30 ? (3)2.5?Rp/Rd?10 ? (4)10°???90° ? (5)
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
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
41.
WOUND CORE, METHOD OF PRODUCING WOUND CORE AND WOUND CORE PRODUCTION DEVICE
This wound core (10) is a wound core (10) including a portion in which grain-oriented electrical steel sheets (1) in which planar portions (4) and bent portions (5) are alternately continuous in a longitudinal direction are stacked in a sheet thickness direction and formed by stacking the grain-oriented electrical steel sheets (1) that have been individually bent in layers and assembled into a wound shape, wherein, when an average height of a roughness curve element in a width direction intersecting the longitudinal direction forming a surface of the bent portion (5) of the grain-oriented electrical steel sheet (1) is Ra(b) and an average height of a roughness curve element in a width direction forming a surface of the planar portion (4) of the grain-oriented electrical steel sheet (1) is Ra(s), the relationship of 1.00
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
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
This wound core is a wound core including a wound core main body obtained by stacking a plurality of polygonal annular grain-oriented electrical steel sheets in a side view, and the grain-oriented electrical steel sheet has planar portions and bent portions that are alternately continuous in a longitudinal direction, and in at least one bent portion, the crystal grain size Dpx (mm) of the grain-oriented electrical steel sheet is FL/4 or more. Here, FL the an average length (mm) of the planar portions.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
This wound core is a wound core including a wound core main body obtained by stacking a plurality of polygonal annular grain-oriented electrical steel sheets in a side view, and the grain-oriented electrical steel sheet has planar portions and bent portions that are alternately continuous in a longitudinal direction, and in a planar portion in the vicinity of at least one bent portion, when the three-dimensional crystal orientation difference between two adjacent points in a series of points arranged at equal intervals in the extension direction of the bent portion is ?, a total number of measured data items of ? is Nx, the number of data items that satisfy ??1.0? is Nt, the number of data items that satisfy ? of 1.0? or more and less than 2.5? is Na, the number of data items that satisfy ? of 2.5? or more and less than 4.0? is Nb, and the number of data items that satisfy ? of 4.0? or more is Nc, the following formulae (1) to (4) are satisfied:0.10?Nt/Nx?0.80 ?????(1)0.37?Nb/Nt?0.80 ?????(2)1.07?Nb/Na?4.00 ?????(3)Nb/Nc?1.10 ?????(4)
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
A wound core (10) in which, in a laminating direction, when the surface roughness of a steel sheet portion in a direction connecting a center in a sheet thickness direction of a grain-oriented electrical steel sheet (1) positioned on the innermost periphery of the wound core among the laminated grain-oriented electrical steel sheets (1) and a center in the sheet thickness direction of the grain-oriented electrical steel sheet (1) positioned on the outermost periphery of the wound core (10) is Ral, and the surface roughness of the grain-oriented electrical steel sheet (1) in a direction parallel to a longitudinal direction on an end surface of a planar portion (4) of the laminated grain-oriented electrical steel sheet (1) is Rac, a ratio Ral/Rac between Ral and Rac satisfies the relationship of 1.5?Ral/Rac?12Ø
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
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
45.
WOUND CORE, METHOD OF PRODUCING WOUND CORE AND WOUND CORE PRODUCTION DEVICE
A wound core (10) is a wound core including a portion in which grain-oriented electrical steel sheets(1) in which planar portions (4) and bent portions (5) are alternately continuous in a longitudinal direction are stacked in a sheet thickness direction and formed by stacking the grain-oriented electrical steel sheets (1) that have been individually bent in layers and assembled into a wound shape, wherein, when an average length of a roughness curve element in a width direction intersecting the longitudinal direction forming a surface of the bent portion (5) of the grain-oriented electrical steel sheet (1) is RSm(b), and an average length of the roughness curve element in the width direction forming a surface of the planar portion 4 of the grain-oriented electrical steel sheet (1) is RSm(s), the relationship of 1.00
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
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
Provided is a wound core including: a substantially rectangular wound core main body in a side view, in which the wound core main body includes a portion in which grain-oriented electrical steel sheets in which planar portions and corner portions are alternately continuous in a longitudinal direction and an angle formed by two planar portions adjacent to each other with each of the corner portions therebetween is 90? are stacked in a sheet thickness direction and has a substantially rectangular laminated structure in a side view, each of the corner portions has two or more bent portions having a curved shape in a side view of the grain-oriented electrical steel sheets 1, the sum of bent angles of the bent portions present in one corner portion is 90?, each bent portion in a side view has an inner side radius of curvature r of 1 mm to 5 mm, and interlaminar friction coefficients which are dynamic friction coefficients of the laminated grain-oriented electrical steel sheets in at least some of the planar portions are 0.20 or more.
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
H01F 1/147 - Alloys characterised by their composition
This wound core is a wound core including: a substantially rectangular wound core main body in a side view in which first planar portions and corner portions are alternately continuous and at least one of two or more bent portions existing in at least one corner portion satisfies Equations (1) to (3) below.Tave?40 nm ... (1)(To-Tu)/Tave?0.50 ... (2)Tave (To-Tu)?240 nm2 ... (3)
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
H01F 1/147 - Alloys characterised by their composition
This wound core is a wound core including a wound core main body obtained by laminating a plurality of polygonal annular grain-oriented electrical steel sheets in a side view, and the grain-oriented electrical steel sheet has planar portions and bent portions that are alternately continuous in a longitudinal direction, and in at least one bent portion, the crystal grain size Dpx of the grain-oriented electrical steel sheet is 2W 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
A wound core (10) is a wound core having a wound shape (10) including a rectangular hollow portion (15) in a center and a portion in which grain-oriented electrical steel sheets (1) in which planar portions (4) and bent portions (5) are alternately continuous in a longitudinal direction are stacked in a sheet thickness direction, which is a wound core formed by stacking the grain-oriented electrical steel sheets(1) that have been individually bent in layers and assembled into a wound shape and in which the plurality of grain-oriented electrical steel sheets are connected to each other via at least one joining part (6) for each roll, wherein the bent portion (5) of the laminated grain-oriented electrical steel sheet (1) has an average Vickers hardness of 190 to 250 HV in an L cross section in the longitudinal direction which is a cross section of the grain-oriented electrical steel sheet (1) in a thickness direction.
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
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
This wound core is a wound core including a substantially rectangular wound core main body in a side view, wherein, in the wound core main body, first planar portions and corner portions are alternately continuous in a longitudinal direction, each corner portion has a curved shape in a side view of the grain-oriented electrical steel sheet, two or more bent portions having a second planar portion between the adjacent bent portions are provided, and in at least one of the first planar portion and second planar portion in the vicinity of the bent portion, the following Formula (1) is satisfied:(Nac+Nal)/Nt?0.010 ? (1)here, Nt is a total number of grain boundary determination locations in the first planar portion and second planar portion region adjacent to the bent portion, and Nac and Nal each are a number of determination location at which subgrain boundaries are able to be identified in a direction parallel to and direction perpendicular to the bent portion boundary.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
A flush self-locking threaded connection partially in a non-locking engagement comprises a first and a second tubular component provided respectively with male and female threaded zone at their respective ends. First portions of the male and female threaded zones with varying thread width and root cooperate along a self-locking tightening arrangement. A locking region within the threaded connection is located in the middle of non- locking regions, and radially centered to the pipe body API tolerances in order to withstand high torque and seal performances.
A coated steel product including a base steel, and a coating layer containing a Zn-Al-Mg alloy layer disposed on a surface of the base steel, in which the coating layer has a predetermined chemical composition, the coated steel product including dendrite-shaped MgZn2 phase having a surface roughness Sa of 50 nm or less on a surface of the Zn-Al-Mg alloy layer, an area ratio of the dendrite-shaped MgZn2 phase having a surface roughness Sa of 50 nm or less being from 30% to 80% within a region of an observable field of view of 5 mm2, and among the dendrite-shaped MgZn2 phase having a surface roughness Sa of 50 nm or less, a number of dendrite-shaped MgZn2 phase having an area of 0.1 mm2 or more being from 5 to 100 within a region of an observable field of view of 25 mm2.
This welded rail according to one aspect of the present invention is provided with: a plurality of rail parts that each have a head section and a pillar section and each have a height h; and a welding joint part that joins the rail parts. The rail parts each have a predetermined chemical composition. The HAZ width of the welding joint part is not more than 60 mm. Regarding the welding joint part, in a region located from 0 to (2/3)×h from a head top part outline surface and within ±5 mm in a longitudinal direction from the welding center in a cross section passing through the center of the welding joint part and in parallel with a longitudinal direction and a vertical direction of the welded rail, the area percentage of martensite structures is 0.0006-0.1000%. In said region, the number of martensite structures having a particle size of 20-200 ?m is 3-80.
Provided is a metal pipe for an oil well capable of achieving compatibility between a high yield torque and an excellent seize resistance. The metal pipe for an oil well according to the present disclosure comprises a pipe main body. The pipe main body includes a pin (40) formed at a first end portion (10A) and a box formed at a second end portion. A plated layer is formed on a first contact surface being one of a pin contact surface (400) of the pin (40) and a box contact surface of the box, and a solid lubricant layer is formed on the plated layer. A second contact surface being the other of the pin contact surface (400) and the box contact surface has an arithmetic mean roughness Ra of 0.5-10.0 ?m, and a rust-preventive coating film (80) in a semi-solid state or a liquid state is formed on the second contact surface.
A metal pipe for an oil well according to the present disclosure can be fastened with a high torque even when the metal pipe has a large diameter. A metal pipe (1) for an oil well according to the present disclosure comprises a pipe main body (10) including a first end portion (10A) and a second end portion (10B). The pipe main body (10) includes a pin (40) formed to the first end portion (10A) and a box (50) formed to the second end portion (10B). The pin (40) includes a pin contact surface (400) including a male screw portion (41), and the box (50) includes a box contact surface (500) including a female screw portion (51). The metal pipe (1) for an oil well according to the present disclosure further comprises a resin film (100) containing a resin, a solid lubricant powder, and copper phthalocyanine on at least one of the pin contact surface (400) and the box contact surface (500).
Ahigh-torque threaded connection with male and female threadforms constituted by wedge threads is provided with high shear and torque resistance. The radius of curvature rl of the base of the load flank of the first thread, located at the end of the male threadform associated with the tip, is not lower than the thread height Thx0.14, and more preferably Thx0.16, to improve the shear resistance of the first thread. Further, the thread pitch may be reduced to increase the number of threads to increase the area of contact for load flanks, or only the radius of curvature of the base of the load flank of the first thread may be increased and smaller radii of curvature may be provided for the other portions to increase the area of contact for load flanks, thereby maintaining high torque resistance.
This electromagnetic steel sheet comprises a base material steel sheet of which one or both surfaces are at least partly coated with an insulating coating having an adhesive capacity, wherein the insulating coating has a logarithmic decrement of less than or equal to 0.3 in a temperature range of 25 to 100?.
H01F 1/147 - Alloys characterised by their composition
H02K 1/04 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof
58.
COATING COMPOSITION FOR ELECTRICAL STEEL SHEET, ELECTRICAL STEEL SHEET, LAMINATED CORE, AND ROTARY ELECTRIC MACHINE
An electromagnetic steel sheet to be used for a laminated core, the electromagnetic steel sheet having, on the surface of a base material steel sheet 2, an insulative coating film 3 on which a coating composition for electromagnetic steel sheets is applied, wherein the coating composition for electromagnetic steel sheets contains an epoxy resin, an epoxy resin curing agent, and an elastomer modified phenol resin, and the contained amount of the elastomer modified phenol resin is 10-100 parts by mass with respect to 100 parts by mass of the epoxy resin.
B32B 15/092 - 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 epoxy resins
C09D 5/25 - Electrically-insulating paints or lacquers
H01F 1/18 - 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 sheets with insulating coating
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
H02K 1/04 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof
59.
COATING COMPOSITION FOR ELECTRICAL STEEL SHEET, ELECTRICAL STEEL SHEET, LAMINATED CORE AND ROTARY ELECTRIC MACHINE
According to the present invention, an electromagnetic steel sheet to be used for a laminated core has an insulating coating film 3 on the surface of a base steel sheet 2, said insulating coating film 3 being formed by applying a coating composition for electromagnetic steel sheets. This coating composition for electromagnetic steel sheets is obtained by blending, at a specific ratio, an epoxy resin, a first curing agent that is composed of a phenolic resin which contains a phenolic skeleton having one or both of an alkyl group and an alkoxy group, and one or more second curing agents that are selected from among phenolic resole resins and phenolic novolac resins.
B32B 15/092 - 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 epoxy resins
C09D 5/25 - Electrically-insulating paints or lacquers
C09D 163/00 - Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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 1/18 - 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 sheets with insulating coating
H02K 1/04 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof
Provided is a duplex stainless steel seamless pipe having high toughness and demonstrating excellent resistance to HISC. This duplex stainless steel seamless pipe has the chemical compositions disclosed in the specification and a microstructure comprising 30-55% of ferrite and austenite. In a square observation field area that comprises the central part of the wall thickness and has a T direction and a C direction, and each side is 250 ?m, the four line segments that extend in the T-direction and divide the observation field area equally into five parts in the C direction are defined as line segments T1-T4. Four line segments extending in the C-direction and equally dividing the visual observation area into five regions in the T-direction are defined as line segments C1-C4. The number of intersections NT, that is, the number of intersections of line segments T1-T4 with ferrite interfaces, is 65 or greater. The number of intersections NC, that is, the number of intersections of line segments C1-C4 with ferrite interfaces, is 50 or greater.
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
A die (10) includes a die body (11) and a removable shell (13). The die body (11) includes a supply flow channel (113). The supply flow channel (113) is formed inside the die body (11). One end of the supply flow channel (113) opens at the surface of the die body (11). The supply flow channel (113) is to be supplied with a fluid for temperature adjustment. The removable shell (13) is mounted removably to the surface of the die body (11). The removable shell (13) includes an outer surface (131) that constitutes at least a part of the forming surface of the die(10). A temperature adjustment space (S1) is provided in the surface of the die body (11) or in the removable shell (13). The temperature adjustment space (S1) is in communication with the supply flow channel (113). The removable shell (13) is divided into a plurality of shell pieces (134). The plurality of shell pieces (134) are arranged in a direction intersecting the longitudinal direction of the die (10) on the surface of the die body (11).
The die (10) includes a die base (12), a die body (11), and an opening/closing member (13). In the die base (12), a storage portion (122) for storing refrigerant is formed. The die body (11) includes a mounting surface (112), a forming surface (111), and a plurality of flow channels (113). The mounting surface (112) is located on the storage portion (122) side of the die base (12). The forming surface (111) is located on the opposite side of the mounting surface (112). The plurality of flow channels (113) pass through the die body (11) from the mounting surface (112)to the forming surface (111). The opening/closing member (13) is disposed between the die base (12) and the die body (11). The opening/closing member (13) includes a plurality of through holes (131) corresponding to the plurality of flow channels (113). The opening/closing member (13) is configured to be movable with respect to the die base (12) and the die body (11) such that each of the through holes (131) brings the corresponding flow channel (113) and the storage portion (122) into communication.
Provided is a threaded coupling that is for a pipe, has excellent seizing resistance, and is not susceptible to loosening when used in a horizontal well; also provided is a method for manufacturing this threaded coupling for a pipe. This threaded coupling for a pipe is provided with a pin (3), a box (4), and a Zn-Ni alloy plated layer (100). The pin (3) has a pin contact surface (34) that includes a male threaded portion (31). The box (4) has a box contact surface (44) that includes a female threaded portion (41). The Zn-Ni alloy plated layer (100) is arranged on the pin contact surface (34) and/or the box contact surface (44). The Zn-Ni alloy plated layer (100) contains graphite.
A self-locking threaded connection partially in a non locking engagement comprises a first and a second tubular component provided respectively with male and female threaded zone (3, 4) at their respective ends. First portions (11, 12) of the female threaded zones with varying thread width and root cooperate together along a self-locking tightening arrangement. A locking region (10) within the threaded connection is located in the middle of non locking portions (22, 23), and radially centered to the pipe body API tolerances in order to withstand high torque and seal performances.
In a threaded connection for pipe with a two-step thread construction, including intermediate shoulders, during stabbing, the internal-pressure sealing surface of the pin near its tip is prevented from contacting the interrnediate shoulder of the box and thus receiving damage. LP, LB, hP and hB shown in FIG. 2 satisfy Expressions (1) and (2), provided below. seal is the angle of slope of the straight line connecting the two ends, as determined along the axial direction, of the internal-pressure sealing surface of the pin. Expression (3), provided below, is also satisfied. LSP < LBLP ... (3) (Typical Drawing: Fig. 2)
In a threaded connection for pipe with intermediate shoulder surfaces provided between two thread steps for functioning as torque shoulders, the compression resistance under repeatedly applied combined loads is improved. The axial distance between the box intermediate shoulder surface 33 and box end shoulder surface 34 of the box 3 before make-up, LB, is larger than the axial distance between the pin intermediate shoulder surface 23 and pin end shoulder surface 24 of the pin 2 before make-up, LP, such that, upon completion of make-up, the pin and box intermediate shoulder surfaces 23 and 33 are in strong pressure contact to function as torque shoulders, while the pin and box end shoulder surfaces 24 and 34 are not in contact or are in light contact. The difference between the axial distances, (LB?LP), is such that, when the pin 2 and box 3 are made up and upon application of a certain magnitude of axial compressive load, the pin 2 and box 3 are slightly axially compressed by the compressive load and the pin end shoulder surface 24 comes into pressure contact with the box end shoulder surface 34 to bear part of the compressive load.(Typical drawing: Fig. 2A)
In a threaded connection for pipe having a two-step thread construction with intermediate shoulder surfaces, compression resistance is further improved. Upon completion of make-up of the pin 2 and box 3, the diameter of a stabbing clearance is 0.15 mm or smaller, where the stabbing clearance is defined between the stab flank of a male thread including an inner thread portion 27 and an outer thread portion 23 and the stab flank of a female thread including an inner thread portion 36 and an outer thread portion 32, thereby causing the stab flanks of the male and female threads to start to be in contact before the angle of rotation ? of the intermediate shoulder surfaces 25 and 34 as appearing in a longitudinal cross section starts to rapidly increase, thus preventing accumulation of damage in the intermediate shoulder surfaces 25 and 34.
The present invention provides an alloy which has high strength, while having a low thermal expansion coefficient. An alloy according to the present disclosure has a chemical composition that contains, in mass%, 0.10% or less of C, 0.50% or less of Si, from 0.15% to 0.60% of Mn, 0.015% or less of P, 0.0030% or less of S, from 30.0% to 40.0% of Ni, 0.50% or less of Cr, 0.50% or less of Mo, 0.250% or less of Co, 0.0150% or less of Al, 0.0050% or less of Ca, 0.0300% or less of Mg, 0.0100% or less of N, 0.0300% or less of O, 0.0040% or less of Pb and 0.020% or less of Zn, while additionally containing a total of 0.015% or more but less than 0.145% of one or more elements that are selected from the group consisting of 0% or more but less than 0.145% of Nb, 0% or more but less than 0.145% of Ti and 0% or more but less than 0.145% of V, with the balance being made up of Fe and impurities; and this alloy satisfies formula (1). (1): (Nb + 3 × Ti + V)/(C + N) = 6.00
Threaded joint, comprising a first and a second tubular component (C1, C2), the first tubular component comprising a first pipe body (10) and a male end (1), the male end comprising a distal surface (17) and a male threaded zone (13) at a male end, the second tubular component comprising a second pipe body (20) and a female end (2) comprising a distal surface and a female threaded zone (23), both male and female threaded zones (13, 23) comprising respectively a varying zone where thread have varying width, and a non varying zone, adjacent to the varying zone, where thread have a constant width, the varying zone of the male threaded zone being made up with the varying zone of the female threaded zone, and non varying zone of the male threaded zone being made up with the non varying zone of the female threaded zone, a thread profile of the male and female threaded zones being trapezoidal and a pin external shoulder (37) of the male end is in axial abutting contact against a corresponding abutment surface (42) of the female distal surface.
According to one aspect of the present invention, provided is a blast furnace operation method characterized in that a high-concentration hydrogen-containing gas which contains at least 80 mol% of hydrogen gas, is blown from a tuyere under certain conditions such as: a condition in which the blowing temperature of the high-concentration hydrogen-containing gas is room temperature to 300 °C, and the blown amount of hydrogen gas in the high-concentration hydrogen-containing gas is 200 Nm3/t to 500 Nm3/t; a condition in which the blowing temperature of the high-concentration hydrogen-containing gas is 300 °C to 600 °C, and the blown amount of hydrogen gas in the high-concentration hydrogen-containing gas is at least 145 Nm3/t; or a condition in which the blowing temperature of the high-concentration hydrogen-containing gas is 600 °C to 900 °C, and the blown amount of the high-concentration hydrogen-containing gas is at least 125 Nm3/t.
This rotor is an interior permanent magnet rotor which is embedded in a travel motor of a vehicle, and is provided with: a laminated core having steel sheets laminated with each other and a bonding layer for bonding the steel sheets adjacent to each other in a laminating direction; and a magnet embedded in the laminated core. When the rotor rotates at 11000 rpm, the maximum displacement amount of the outer edge of the laminated core toward the radial direction of the rotor is 0.1 mm or less.
H02K 15/03 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
The purpose of the present invention is to improve the productivity of a screw-threaded joint having a two-stage screw structure including an intermediate shoulder surface by facilitating machining of the intermediate shoulder surface and by preventing cracking near an intermediate critical cross-section under tensile load. On the outer circumference of a pin 2 between an intermediate shoulder surface 24 and a second male screw 27 of the pin 2, a circumferential direction groove 25 having a curved surface 25a smoothly continuous with the intermediate shoulder surface 24 is provided, and thus plastic strain that occurs near a pin intermediate critical cross-section PICCS is reduced. Further, on the inner circumference of a box 3 between an intermediate shoulder surface 35 and a first female screw 32 of the box 3, a circumferential direction groove 34 having a curved surface 34a smoothly continuous with the intermediate shoulder surface 35 is provided, and thus plastic strain that occurs near a box intermediate critical cross-section BICCS is reduced.
A threaded tubular connection comprises a first tubular (12) component and a second tubular component (14). The first tubular component (12) includes a female portion (10) defined on an interior surface of the first tubular component. The female portion includes an inner threaded portion (16d) and an outer threaded portion (16b) which are offset radially with respect to a longitudinal axis of the first tubular component by a first shoulder (26). The second tubular component (14) includes a male portion (18) defined on an exterior surface of the second tubular component. The male portion is to be inserted into the female portion, and includes an inner threaded portion (18d) and an outer threaded portion (18b) which are offset radially with respect to a longitudinal axis of the second tubular component by a second shoulder (28). The second shoulder is to abut the first shoulder once the male portion is connected to the female portion. The threaded tubular connection comprises an inner short length fluid tight seal.
This wound core is provided with a laminate in which a plurality of electromagnetic steel sheets are laminated in an annular shape in a side view, wherein: the laminate has a plurality of bent parts and a plurality of side parts located between the bent parts adjacent with each other; and at least one of the plurality of bent parts is a high-space-factor bent part in which the space factor of the electromagnetic steel sheets is higher than the average space factor of the electromagnetic steel sheets in the plurality of side parts.
A wound core comprising a laminate having a plurality of electromagnetic steel sheets laminated in a ring, when viewed from the side. The laminate has a plurality of bent sections and a plurality of edge sections positioned between adjacent bent sections. At least one edge section among the plurality of edge sections has a heat transfer path facing the electromagnetic steel sheets, between at least part of the laminated electromagnetic steel sheets. The heat transfer path is in the edge sections only.
The present invention provides a threaded coupling, for a steel pipe having a large diameter size, which can provide high torque-resistance performance and high sealing performance, and which has shear-resistance performance corresponding to the size of the steel pipe to be linked. A steel pipe threaded coupling 1 has: a tubular pin 10 provided to a tip section of a steel pipe 2 having a large diameter size; and a tubular box 20 into which the pin 10 is screwed and which is fastened to the pin 10. The pin 10 has male threads 11 comprising tapered threads. The box 20 has female threads 21 comprising tapered threads. The male threads 11 and the female threads 21 are wedge-shaped threads in which the thread ridge span gradually narrows, the cross-sectional shape of the thread ridges being dove-tailed. The male threads 11 are designed to satisfy the following formula so that the thread ridge span at a thread terminus end on the tip side is of a size matching the size of a pipe body of the steel pipe 2. 0.4={(DW+2TH)2-DW 2}×Wmin/(OD2-ID2)=0.6
A technique is provided which enables producing a steel formed product with hot-dip Zn-Al-Mg coating, which has an excellent appearance and does not require heating of the steel formed product prior to immersion in the molten plating bath. This flux (11) for hot-dip Zn-Al-Mg plating contains ZnCl2, and a low-reactivity chloride which has low reactivity to Mg in the plating bath and which comprises at least two compounds selected from a group of compounds comprising alkali metal chlorides and alkali earth metal chlorides, and the composition of the ZnCl2 and the low-reactivity chloride is adjusted such that the liquidus temperature of said flux becomes less than or equal to 450°C.
C23C 2/04 - Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
Provided is a duplex stainless steel material having high strength, excellent pitting resistance and excellent hot workability. The duplex stainless steel material according to the present disclosure has a chemical composition consisting of, in mass%, C: 0.030% or less, Si: 0.20 to 1.00%, Mn: 0.50 to 7.00%, P: 0.040% or less, S: 0.0100% or less, Al: 0.100% or less, Ni: 4.20 to 9.00%, Cr: 20.00 to 28.00%, Mo: 0.50 to 2.00%, Cu: 1.90 to 4.00%, N: 0.150 to 0.350%, V: 0.01 to 1.50%, and one or more types of element selected from the group consisting of Ca: 0.0001 to 0.0200% and Mg: 0.0001 to 0.0200%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2) described in the description, a microstructure consisting of 35.0 to less than 50.0% of ferrite in volume ratio and austenite as the balance, and a yield strength of 550 MPa or more.
An object of the present disclosure is to ensure good sealability in a threaded connection for steel pipe of a two-step thread construction including an intermediate seal and interrnediate shoulders. The pin 2 includes an intermediate seal section 22, an inner male-threaded section 23, an intermediate shoulder 24, an intermediate seal section 25 and an outer male-threaded section 26. The box 3 includes an intermediate seal section 32, an inner female-threaded section 33, an interrnediate shoulder 34, an intermediate seal section 35 and an outer female-threaded section 36. The pin 2 has a pin intermediate critical cross section PICCS located near an end of the first male-threaded section23. The box 3 has a box critical cross section BCCS located near an end of the first female-threaded section 33 and a box intermediate critical cross section BICCS located near an end of the second female-threaded section 36. The pin 2 and the box 3 satisfy the following relationships: PICCSA + BICCSA > BCCSA, and 0.70 PICCSA/BICCSA 0.95.
Threaded tubular connection for the casing of hydrocarbon wells obtained by makeup of a male tool joint with a female tool joint, the connection comprising a threaded portion (16a, 18a), such that the male and respectively female threaded portions each comprise a helix provided with a load flank, a thread crest, a stabbing flank, a thread root, such that a pitch of the load flank (LFLp, LFLb) and a pitch of the stabbing flank (SFLp, SFLb) fulfils the following condition: [Math 22] SFL b = LFL b = SFL p = LFL p = k, A tooth width (Wtp) of the male helix and a tooth width of the female helix (Wtb) are such that [Math 23] or [Math 24] and [Math 25] Wtp + Wtb < k
Threaded tubular connection for the casing of hydrocarbon wells obtained by makeup of a male tool joint with a female tool joint, the connection comprising in this order from a free edge (19) of the male tool joint: an inner metal-metal seal (25, 26), a first threaded portion (16a, 18a), an intermediate abutment (22, 24), an intermediate metal-metal seal (27, 28) and a second threaded portion (16b, 18b), the free edge (19) being at a non-zero axial distance (d) from the female tool joint, the threaded portions each comprising a helix equipped with a load flank, a thread crest, a stabbing flank, a thread root, such that a pitch of the load flank (LFLp1, LFLb1) and a pitch of the stabbing flank (SFLp1, SFLb1) of the first threaded portion, and respectively a pitch of the load flank (LFLp2, LFLb2) and a pitch of the stabbing flank (SFLp2, SFLb2) of the second threaded portion fulfil the following condition: [Math 12] SFL b 1 = LFL b 1 = SFL b 2 = LFL b 2 = SFL p1 = LFL p 1 = SFL p 2 = LFL p 2.
A wheel (100) includes a boss (10), a rirn (20), and a web (30). The rim (20) includes a tread (21) and a flange (22). The web (30) connects the boss (10) and the rirn (20). When the wheel (100) is viewed in its longitudinal section, the web (30) has a linear plate-thickness center line (A) that is inclined such that the plate-thickness center line (A) approaches the flange (22) side as it extends outward in a radial direction. When the wheel (100) is viewed in its longitudinal section, an outer end (Aa) of the plate-thickness center line (A) is positioned between the flange (22) and a center (211) of the tread (21) in an axial direction of the wheel (100).
A threaded connection for steel pipe is provided that can be made up quickly and appropriately. The threaded connection includes a steel pipe 20m, a steel pipe 20f, and a coupling 50 for connecting the steel pipes 20m and 20f. The pipe bodies 21m and 21f of the steel pipes 20m and 20f include annular marking grooves 23m and 23f, respectively, formed on the outer peripheries of the pipe bodies 21m and 21f.
Provided is a threaded coupling for a steel pipe, which can be quickly and properly fastened. This threaded coupling comprises a steel pipe 20m, a steel pipe 20f, and a coupling 50 for fastening the steel pipes 20m and 20f to each other. The respective pipe main bodies 21m and 21f of the steel pipes 20m and 20f include an annular marking groove 23m and 23f formed on the outer circumference of the pipe main body 21m and 21f.
A threaded connection for steel pipe is provided that can be made up quickly and appropriately. The threaded connection includes a steel pipe 20m, a steel pipe 20f, and a coupling 50 for connecting the steel pipes 20m and 20f. The pipe bodies 21m and 21f of the steel pipes 20m and 20f include annular marking grooves 23m and 23f, respectively, formed on the outer peripheries of the pipe bodies 21m and 21f.
A threaded connection for steel pipe is provided that can be made up quickly and appropriately. The threaded connection includes a steel pipe 20m, a steel pipe 20f, and a coupling 50 for connecting the steel pipes 20m and 20f. The pipe bodies 21m and 21f of the steel pipes 20m and 20f include annular marking grooves 23m and 23f, respectively, formed on the outer peripheries of the pipe bodies 21m and 21f.
A rail including a predetermined chemical composition is provided, in which 90 area % or greater of a metallographic structure in a cross section of a rail web portion is a pearlite structure, a minimum value of a hardness in the cross section of the rail web portion is Hv 300 or greater, and a difference between a maximum value and the minimum value of the hardness in the cross section of the rail web portion is Hv 40 or less. The rail can suppress fatigue damage from occurring from a web portion and has fatigue breakage resistance, which is required for a rail of a freight railway. Particularly, an object of the present invention is to provide a rail that can suppress the occurrence of fatigue damage even when the rail is applied to a curved track in which fatigue breakage is likely to occur.
A blast furnace operation method according to one aspect of the present invention comprises the steps of: previously determining the correlation between a carbon intensity in a reducing gas and a carbon consumption intensity reduction amount Input?C due to the blowing of the reducing gas into a blast furnace for every C/H molar ratio between carbon atom and hydrogen atom in the reducing gas; determining a carbon intensity which becomes equal to or larger than a predetermined target value for the carbon consumption intensity reduction amount Input?C in the reducing gas on the basis of the correlation that has been determined for every C/H molar ratio; and adjusting the blow amount of the reducing gas to be blown into the blast furnace on the basis of the carbon intensity in the reducing gas which had been determined in the proceeding step and the content ratio of carbon in the reducing gas.
To provide a threaded connection for pipes having a large delta torque, and being threadable at both a fastening torque equivalent to that of a conventional threaded connection and a fastening torque higher than that of the conventional threaded connection. A threaded connection for pipes includes a pin, a box, a shoulder part plating layer, and a non-shoulder part plating layer. The shoulder part plating layer has an outermost layer formed of a high friction coefficient plating layer, and is arranged on a pin side shoulder part and/or a box side shoulder part. The non-shoulder part plating layer has an outermost layer formed of a low friction coefficient plating layer having a coefficient of friction lower than a coefficient of friction of the high friction coefficient plating layer, and the non-shoulder part plating layer is arranged on at least one of a pin side thread part, a pin side metal seal part, a box side thread part, and a box side metal seal part.
Provided are a composition for the purpose of obtaining a threaded pipe joint having excellent anti-galling properties and excellent high torque properties, and a threaded pipe joint provided with a lubricant coating layer formed from the composition, and having excellent anti-galling properties and excellent high torque properties. This composition is for the purpose of forming a lubricant coating layer (21) on a threaded pipe joint, and contains polyisobutylene, metallic soap, wax, and a basic aromatic organic acid metal salt. This threaded pipe joint comprises: a pin (3) having a pin-side contact surface (34) containing a pin-side threaded section; a box (4) having a box-side contact surface (44) containing a box-side threaded section; and a lubricant coating layer (21) comprising the composition and serving as the outermost surface layer on the pin-side contact surface (34) and/or the box-side contact surface (44).
C10M 167/00 - Lubricating compositions characterised by the additive being a mixture of a macromolecular compound, a non-macromolecular compound and a compound of unknown or incompletely defined constitution, each of these compounds being essential
C10M 129/56 - Acids of unknown or incompletely defined constitution
C10M 143/06 - Lubricating composition characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation containing butene
C10M 159/06 - Waxes, e.g. ozocerite, ceresine, petrolatum or slack-wax
C10M 159/20 - Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products
E21B 17/04 - Couplings; Joints between rod and bit, or between rod and rod
F16L 15/04 - Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
91.
CR-NI ALLOY AND SEAMLESS STEEL PIPE MADE OF CR-NI ALLOY
Provided is a Cr-Ni alloy which has high yield strength and high resistance to sulfuric acid general corrosion at the high temperature of 250°C. This Cr-Ni alloy has a chemical composition which contains, in mass%, from 0.01% to 0.50% of Si, from 0.01% to 1.00% of Mn, from 21.0% to 27.0% of Cr, 40.0% or more but less than 50.0% of Ni, 4.5% or more but less than 9.0% of Mo, from 2.0% to 6.0% of W, more than 2.0% but 6.0% or less of Cu, from 0.01% to 2.00% of Co, from 0.001% to 0.010% in total of one or two elements selected from the group consisting of Ca and Mg, from 0.005% to 0.200% of sol. Al, and from 0.01% to 0.20% of N, with the balance made up of Fe and impurities. The dislocation density in this Cr-Ni alloy satisfies formula (1). (1): 8.00 × 1014 = ? = 2.50 × 1015 + 1.40 × 1014 × [Cu + Co]
C22C 30/02 - Alloys containing less than 50% by weight of each constituent containing copper
C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
C22F 1/16 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
Provided is a steel-pipe threaded joint that is unlikely to cause seizing of both an internal thread and an external thread. A steel-pipe threaded joint 1 is provided with a pin 10 and a box 20. The pin 10 includes a nose 12, a tapered inner male thread 14, a tapered outer male thread 17, a pin inner sealing surface 13, a pin intermediate shoulder surface 18, and a pin intermediate sealing surface 16. The box 20 includes a tapered inner female thread 24, a tapered outer female thread 27, a box inner sealing surface 23, a box intermediate shoulder surface 28, and a box intermediate sealing surface 26. The inner male thread 14, the outer male thread 17, the inner female thread 24, and the outer female thread 27 include complete thread parts 141, 171, 241, and 271, respectively. Each of the complete threaded parts includes an inner end positioned on the tip side of the pin 10, and an outer end positioned on the opposite side to the tip of the pin 10. The steel-pipe threaded joint 1 satisfies expressions (1) and (2). (1): x1+L1
This stacked core is provided with: a plurality of electromagnetic steel sheets stacked on each other; and bonding parts that are each disposed between the electromagnetic steel sheets adjacent to each other in the stacking direction and that each bond the electromagnetic steel sheets. The electromagnetic steel sheets each have an annular core back part and a plurality of tooth parts that extend from the core back part in the radial direction of the core back part and that are arranged with intervals therebetween in the circumferential direction of the core back part. The tooth parts of the electromagnetic steel sheet have bonding regions in which belt-shaped bonding parts extending in the circumferential direction are disposed.
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
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
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
94.
ADHESIVELY-LAMINATED CORE FOR STATOR AND ELECTRIC MOTOR
This stator adhesive laminated core is provided with: a plurality of magnetic steel sheets having an insulating coat in a phosphate system on the surface thereof and overlapped coaxially; and an adhesive portion provided between the respective magnetic steel sheets. The insulating coat has an average thickness of 0.3 µm to 1.2 µm. The adhesive portion has an average thickness of 1.0 µm to 3.0 µm. When the average thickness of the insulating coat is denoted by t1 with a unit of µm and the average thickness of the adhesive portion is denoted by t2 with a unit of µm, the following formula 1 is satisfied. -4.3 × t1 + 3.6 = t2 = -4.3 × t1 + 6.9 ··· (formula 1)
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
This laminated core is provided with a plurality of magnetic steel sheets laminated to each other and covered with an insulating coat on both surfaces and an adhesion portion provided between the magnetic steel sheets adjacent to each other in the lamination direction and bonding the magnetic steel sheets to each other, wherein the bonded area ratio of the magnetic steel sheets by the adhesion portion is 1% to 40%, inclusive.
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
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
A laminated core that comprises a plurality of laminated electromagnetic steel sheets. Of the plurality of electromagnetic steel sheets, the electromagnetic steel sheets that are located on a first side in the lamination direction and the electromagnetic steel sheets that are located on a second side in the lamination direction are fitted together but not adhered to each other, and the electromagnetic steel sheets that are located in the center in the lamination direction are adhered to each other but not fitted together.
This laminated core is provided with a plurality of magnetic steel sheets laminated to each other, wherein all pairs of the magnetic steel sheets adjacent to each other in the laminated direction are fixed to each other. Among the all pairs of the magnetic steel sheets, partial pairs of magnetic steel sheets are swaged to and not bonded to each other, and the remaing pairs of magnetic steel sheets are bonded to and not swaged to each other.
This laminated core is provided with: a plurality of magnetic steel sheets laminated to each other; and adhesion portions arranged between the magnetic steel sheets adjacent to each other in the lamination direction to bond these magnetic steel sheets. The adhesion portions partially bond the magnetic steel sheets adjacent to each other in the lamination direction to each other, and the adhesion portions adjacent to each other in the lamination direction have mutually different arrangement regions in plan view from the lamination direction.
This laminated core includes a plurality of electromagnetic steel sheets laminated in a thickness direction. The electromagnetic steel sheets each include an annular core back portion, and a plurality of teeth portions projecting radially from the core back portion and arranged at intervals in the circumferential direction of the core back portion. A caulking portion is provided in a section of the core back portion corresponding to the teeth portion, and an adhesive portion is provided to the teeth portion.
This laminated core is provided with: a plurality of magnetic steel plates that are laminated to each other, and in which both surfaces of each steel plate is covered by an insulating film; and bonding parts that are provided between adjacent magnetic steel plates in the lamination direction, and that bond the magnetic steel plates. An adhesive forming the bonding parts includes a first phase and a second phase. The bonding parts have a sea-island structure comprising the first phase, which serves as a sea structural part, and the second phase, which serves as an island structural part. The first phase contains an epoxy resin, an acrylic resin, and a curing agent, and has an SP value of 8.5 to 10.7 (cal/cm3)1/2. The second phase contains an elastomer and has an SP value of 7.5 to 8.4 (cal/cm3)1/2.
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
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
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
patents
