A metallic glass powder magnetic core which comprises a plurality of grains each comprising a soft magnetic metallic glass alloy and 1% by mass or less of an insulation film formed at each of grain boundaries among the plurality of grains, has a density ratio of 0.90 or more, an iron loss of 200 kW/m3(0.1 T/50 kHz) or less in a magnetic path cross section of 10 mm, and has specific resistance of 1×105 μΩm or more.
B22F 1/00 - Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
B22F 1/02 - Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition comprising coating of the powder
B22F 9/02 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes
B22F 9/08 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
C22C 45/02 - Amorphous alloys with iron as the major constituent
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
H01F 1/153 - Amorphous metallic alloys, e.g. glassy metals
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
2.
INSERT SINTERED PART AND MANUFACTURING METHOD FOR SAME
The present invention includes: using a forming mold that includes a fixed mold and a movable mold that moves along a parting surface with respect to the fixed mold; moving the movable mold along the parting surface, thereby pressing and holding a sintered part between the movable mold and the fixed mold; forming a cavity, using the forming mold, around a region excluding portions of the sintered part that contacts the fixed mold and the movable mold; filling the cavity with a molten material that becomes an exterior part; and integrating the sintered part and the exterior part by insert molding.
B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
B22F 7/08 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
A method for manufacturing a Cu-Ni-Al-based sintered alloy according to the present invention is characterized by comprising preparing a raw material powder including, in terms of mass% compositional ratios, 1-15% Ni and 1.9-12% Al, the remainder comprising Cu and unavoidable impurities, by adding pure Al powder to an alloy powder including Cu, Ni, and Al and mixing the powder, forming a powder compression molded body by powder compression molding using the raw material powder, and sintering the powder compression molded body in a mixed gas atmosphere of nitrogen gas and hydrogen gas including at least 3 vol% of hydrogen gas.
Provided is a cutting tool characterized by having, on a surface of the cutting tool before cutting a material being cut, a surface protective coating containing a wear resistance improving material derived from a material added to the material being cut. Also provided are a compact and a plating raw material characterized by containing a material used as a raw material for the wear resistance improving material.
This heat-resistant sintered sliding member (1) is characterized by having a structure in which lubricating phases (3) are dispersed in a matrix phase (2), and in that: the overall composition has a composition containing 18-35% of Cr, 0.3-15% of Mo, 0-30% of Ni, 0.5-6% of Si, 0.2-4.0% of S, 0-1.2% of P and 0-0.8% of B, with the remainder comprising Fe and unavoidable impurities; the matrix phase (2) is a Fe-Cr-Mo-Si-based matrix phase or a Fe-Cr-Mo-Ni-Si-based matrix phase; the lubricating phases (3) contain chromium sulfide; and the porosity of the sliding member as a whole is 2.0% or less.
In the present invention, a sintered component such as a sintered bearing and an exterior component are integrated by insert molding without forming a film on at least one end surface of the sintered component. The present invention comprises: a sintered component forming step for forming a sintered component by powder molding; and an insert molding step for forming a sintered insert component in which an outer peripheral section of the sintered component is integrated with an exterior component, wherein in the sintered component forming step, one or more grooves or elongated projections are formed on the outer peripheral section in a region excluding at least one end portion of the sintered component, and the insert molding step includes a mold assembling step for forming a cavity in the outer peripheral section of the sintered component by causing an outer peripheral surface of the end portion to abut on an inner peripheral surface of an insert molding mold along the circumferential direction and covering the peripheries of the one or more grooves or elongated projections by the insert molding mold with spaces therebetween, and a filling step for filling, after the mold assembling step, the cavity with a molten material that is to become the exterior component.
B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
B22F 7/08 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
F16C 17/02 - Sliding-contact bearings for exclusively rotary movement for radial load only
F16C 33/14 - Special methods of manufacture; Running-in
F16C 35/02 - Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
This sintered bearing is characterized by comprising: a substantially circular cylindrical bearing body (11, 31, 41, 51, 61A, 61B, 71A, 71B, 81, 91) which has a through-hole (21, 86, 96) formed at the center thereof, and which is formed from a sintered material; a circular plate-shaped seal member (12, 82, 92) which has one surface side disposed so as to be in contact with the bearing body (11, 31, 41, 51, 61A, 61B, 71A, 71B, 81, 91) and which has an opening (23, 82a, 92a) formed at the center thereof; and a block-shaped engagement member (13, 33, 43, 53, 61A, 71A, 83, 93) which is in contact with at least the other surface side (12b) of the seal member (12, 82, 92) and which grips the seal member (12, 82, 92) between the engagement member (13, 33, 43, 53, 61A, 71A, 83, 93) and the bearing body (11, 31, 41, 51, 61A, 61B, 71A, 71B, 81, 91).
A plurality of recessed oil supply surfaces arranged in an isolated island-like distribution pattern, and a sliding surface continuous around the oil supply surfaces and supporting the outer circumferential surface of a shaft, are formed on the inner circumferential surface of a bearing hole into which the shaft is inserted, and the maximum difference in elevation between the sliding surface and the oil supply surfaces is 0.01% to 0.5% of the inner diameter Di of the sliding surface. The surface opening ratio of pores in the sliding surface is equal to or less than 10%, the surface opening ratio of the pores in the oil supply surfaces is more than 10% and less than 40%, and the surface area of a single oil supply surface is 0.03 mm2to 0.2×Di2mm2.
This silica-based insulator-coated soft magnetic powder is an Fe-based soft magnetic powder the surface of which is coated with a silica-based insulating film, wherein the silica-based insulating film contains an Fe oxide and a Si oxide, and the Fe oxide and the Si oxide satisfy the relationship O(-Fe) / O(-Si) (the ratio of the quantity of O in the Fe oxide relative to the quantity of O in the Si oxide in the silica-based insulating film) = 0.05-1.0 (at% ratio).
B22F 1/00 - Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
B22F 1/02 - Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition comprising coating of the powder
C01B 33/12 - Silica; Hydrates thereof, e.g. lepidoic silicic acid
H01F 1/20 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
Provided is a novel sintered oil-retaining bearing which exhibits excellent wear resistance and cost performance under harsh use conditions such as an output shaft of a motor for an electric component and a wiper motor of an automobile, where a bearing is subject to a heavy load and hammering vibration from a shaft. The bearing has: a metallographic structure containing 15-30 mass% of Cu, 1-4 mass% of C, and the balance Fe and incidental impurities, the copper being fused into at least the bearing surface; and in the base metal, pearlite or pearlite containing locally scattered ferrite and a copper-rich phase arranged in a mesh-like pattern. Free graphite is also dispersedly distributed in the base metal.
The present invention provides a bearing for a motor-type fuel injection pump, the bearing being formed of a Cu-Ni-based sintered alloy that is inexpensive and exhibits excellent corrosion resistance and abrasion resistance. The present invention comprises, in mass%, 10-20% of Ni, 2-4.5% of Sn, 0.05-0.4% of P, and 2-7% of C, with the remaining portion being Cu and unavoidable impurities, has a metal structure in which Sn is uniformly dispersed and distributed in the metal matrix, has a porosity of 7-17%, and has free graphite dispersed and distributed with pores.
Provided is a heat-resistant sintered material: that has a composition which includes, by mass%, Cr: 15 to 30%, Ni: 8 to 30%, Si: 2.0 to 6.0%, C: 0.5 to 2.5%, and the balance comprising Fe and inevitable impurities; and that has a structure in which a hard phase is dispersed in a parent phase. The parent phase contains Fe, Cr, Ni, and Si, the hard phase contains Fe, Cr, and C, and porosity is 2.0% or less.
C22C 33/02 - Making ferrous alloys by powder metallurgy
13.
HEAT-RESISTANT SINTERED MATERIAL HAVING EXCELLENT OXIDATION RESISTANCE, WEAR RESISTANCE AT HIGH TEMPERATURES AND SALT DAMAGE RESISTANCE, AND METHOD FOR PRODUCING SAME
This heat-resistant sintered material has a composition which contains, in mass% as a whole composition, 20-38% of Cr, 0.5-3.0% of Mo, 3.0-7.0% of Si and 0.5-2.5% of C with the balance made up of Fe and unavoidable impurities. This heat-resistant sintered material has a structure wherein hard phases are dispersed in a matrix; the matrix contains Fe, Cr, Mo and Si; the hard phases contain Cr, Fe, Mo and C; and the porosity is 2.0% or less.
In order to provide an adequate amount of oil to a sliding surface and to prevent oil from moving from the sliding surface to the interior, thereby achieving lower friction and improving the bearing sliding characteristic, in this oil-impregnated sintered bearing (1) a sliding surface (3) supporting the outer circumferential surface of a shaft (11) and an oil supply surface (4) having a larger diameter than the sliding surface (3) are formed on the inner circumferential surface of a bearing hole (2) in which the shaft (11) is inserted, and are formed adjacent to each other in the axial direction of the bearing hole (2). The difference in height d1 between the sliding surface (3) and the oil supply surface (4) is 0.01% to 15% of the inner diameter of the sliding surface, the surface opening ratio of the sliding surface (3) is 10% or less, the surface opening ratio of the oil supply surface (4) exceeds 10%, and the average equivalent-circle diameter of the openings of pores in the sliding surface is 20 μm or less.
The present invention is characterized by being provided with: a bearing sleeve (11) composed of a sintered material and having a shaft hole; an annular seal member (12) disposed such that one surface thereof contacts the bearing sleeve; and a washer member (13) which is in contact with the other surface opposite to the one surface of the seal member and engages the seal member with the bearing sleeve, wherein the washer member (13) is fixed relative to the bearing sleeve (11).
The present invention pertains to an oil-impregnated sintered bearing in which a Fe-Cu-based sintered body is impregnated with lubricant oil and which has a bearing hole (3) for supporting a rotary shaft (2) inserted therethrough, wherein: an inner circumferential surface (S) of the bearing hole (3) is at least provided with a first region (3A) that includes the central part in an axial direction and provided with a second region (3B or 3C) that covers from one end of the first region (3A) up to one opening of the bearing hole (3); and the second region (3B or 3C) has a friction surface (S2 or S3) that has a larger Fe-phase area and a smaller Cu-phase area as compared to those in a friction surface (S1) of the first region (3A).
This oil-impregnated sintered bearing comprises a Fe-Cu sintered body impregnated with a lubricant oil and has a bearing hole for supporting a rotation shaft passing therethrough. The inner circumferential surface of the bearing hole comprises a first region that forms a center portion in the axial direction, a second region extending from one end of the first region to one opening of the bearing hole, and a third region extending from the other end of the first region to the other opening of the bearing hole. The area ratio of a Cu phase in the center along the axial direction of the second region is 80-100% of the area ratio of a Cu phase in the center along the axial direction of the third region.
A die 31 having a cavity 32, and a lower punch 41 fitted into the cavity 32 are divided and slid along a division plane 34 passing through the cavity 32 parallel to the fitting direction of the die 31 and the lower punch 41, whereby divided cavities 32A, 32B are placed in a state of alignment along the division plane 34, the divided cavities 32A, 32B are each filled with a raw material powder, and the die 31 and the lower punch 41 are then slid along the division plane 34, whereby the divided cavities 32A, 32B are combined as the original cavity 32, and the raw material powder in the cavity 32 in the combined state is compressed by an upper punch and the lower punch 41.
B22F 7/06 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools
B22F 3/035 - Press-moulding apparatus therefor with one or more of the parts thereof being pivotally mounted
B30B 11/00 - Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses or tabletting presses
B30B 11/02 - Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses or tabletting presses using a ram exerting pressure on the material in a moulding space
This molding die is provided with a first die having a through-hole, a second die inserted in the through-hole and capable of moving relative to the first die, and a first punch and second punch each insertable into the through-hole, a cavity for compression-molding a molded object being formed in the through-hole, the cavity being surrounded by the second die and the first punch and second punch, an undercut molding part being formed in the surface of the second die facing the cavity, and the second die being formed so as to be divisible into at least two divisions.
B22F 3/035 - Press-moulding apparatus therefor with one or more of the parts thereof being pivotally mounted
B22F 5/10 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
B30B 11/02 - Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses or tabletting presses using a ram exerting pressure on the material in a moulding space
20.
IRON-COPPER-BASED OIL-IMPREGNATED SINTERED BEARING AND METHOD FOR MANUFACTURING SAME
Provided are a novel iron-copper-based oil-impregnated sintered bearing and a method for manufacturing the same, the bearing having minimal hard iron alloy phases and excellent wear resistance and cost performance in a low-rotation, high-load usage condition such as in the output shaft of an electric motor for an automobile. An iron-copper-based oil-impregnated sintered bearing including 10-55% by mass of Cu, 0.5-7% by mass of Sn, 0-4% by mass of Zn, 0-0.6% by mass of P, and 0.5-4.5% by mass of C, the remainder comprising Fe and unavoidable impurities, wherein the area ratio of free graphite dispersed in a metal matrix thereof is 5-35%, the porosity thereof is 15% to 25%, and the hardness of an iron alloy phase in a base thereof is Hv 65-200. In the present invention, flake graphite powder and/or scaly graphite powder having an average particle diameter of 10-100 µm is used.
The present invention pertains to a dust core coated with silica-based insulation, the dust core being characterized by having a structure in which Fe-based soft magnetic powder particles having surfaces coated with silica-based insulating films are bonded via grain boundary layers composed of the plurality of silica-based insulating films, wherein the grain boundary layers contain Fe diffused from the Fe-based soft magnetic powder particles, and contain oxides of each of Fe and Si, or a composite oxide of Fe and Si.
H01F 1/147 - Alloys characterised by their composition
B22F 1/02 - Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition comprising coating of the powder
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
B22F 3/24 - After-treatment of workpieces or articles
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 molding mold is characterized by the following: being provided with a first die having a through hole, a second die that is inserted in the through hole and is capable of relative movement with respect to the first die, and a first punch and a second punch that can each be inserted in the through hole; an undercut forming part being provided to the second die; and an object to be molded being compression-molded in a cavity surrounded by an inner side surface of the through hole, the second die, the first punch, and the second punch.
B30B 11/02 - Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses or tabletting presses using a ram exerting pressure on the material in a moulding space
This sintered sliding material is characterized by: comprising a sintered body of a plurality of Cu-Ni alloy grains including Sn and C which has a composition including, expressed in mass%, 10-35% of Ni, 5-12% of Sn, 0-0.9% of P, and 4.1-9% of C, the remainder being Cu and unavoidable impurities; and having a structure in which pores are formed in a dispersed manner at boundaries of the plurality of alloy grains, and free graphite is distributed in the pores. The sintered sliding material is further characterized in that the amount of C in a metal matrix formed by the alloy grains is 0-0.07% expressed in mass%.
This Cu-based sintered sliding material comprises a sintered body having a composition which includes, expressed in mass%, 7-35% of Ni, 1-10% of Sn, 0.9-3% of P, and 0.5-5% of C, the remainder being Cu and unavoidable impurities. The sintered body is provided with: alloy grains which include Sn and C, and which have a Cu-Ni-based alloy as a main component; a grain boundary phase which is distributed in a dispersed manner at boundaries of the alloy grains, and which has Ni and P as main components; and free graphite interposed between the boundaries of the alloy grains. The Cu-based sintered sliding material has a structure in which pores are formed in a dispersed manner at the boundaries of the alloy grains. The C content in a metal matrix including the alloy grains and the grain boundary phase is 0.02-0.20% expressed in mass%.
F16C 33/12 - Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
F16C 33/14 - Special methods of manufacture; Running-in
25.
COBALT-FREE HEAT-RESISTANT SINTERING MATERIAL HAVING SUPERIOR HIGH-TEMPERATURE WEAR RESISTANCE AND HIGH-TEMPERATURE STRENGTH, AND METHOD FOR PRODUCING SAME
The invention according to the present application pertains to a cobalt-free heat-resistant sintering material (A) having superior high-temperature wear resistance and high-temperature strength, and comprising a ferrous alloy base (1) and 33–60% by volume of Chromium-Iron-Boron hard particles (2) dispersed therein. The production method of the invention according to the present application is characterized in that at least one from among powdered CrB2, powdered Cr2B, and powdered CrB is added to and mixed with a ferrous powdered alloy having an average particle size of 5–15 μm, after which the mixed powder is compression molded, and then sintered at 1150–1250°C.
C22C 29/14 - Alloys based on carbides, oxides, borides, nitrides or silicides, e.g. cermets, or other metal compounds, e. g. oxynitrides, sulfides based on borides
C22C 33/02 - Making ferrous alloys by powder metallurgy
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
26.
SINTERED OIL-RETAINING BEARING AND PROCESS FOR PRODUCING THE SAME
The present invention pertains to a sintered oil-retaining bearing in which a sliding surface (3) for supporting the outer peripheral surface of a shaft (11) and a helical oil supply surface (4) centered about the axial center of a shaft hole (2) are formed adjacent to each other in the inner peripheral surface of the shaft hole (2) through which the shaft (11) is inserted, the surface opening ratio in the sliding surface (3) is 10% or less, and the surface opening ratio of the oil supply surface (4) exceeds 10%. The present invention thereby makes it possible to supply a sufficient amount of oil to the sliding surface (3), to minimize the amount of supplied oil that moves to the interior from the sliding surface (3), to achieve a low coefficient of friction, and to improve the sliding characteristic of the bearing.
In the present invention, a die for compressing and sizing a sintered body (1) with straight parts (11, 21) is provided with upper part-side tapered parts (15, 25) at a die upper part (13) and a core rod upper part (23), and is provided with the straight parts (11, 21) at a die lower part (14) and a core rod lower part (24). The material of the die upper part (13) and the core rod upper part (23) has a higher Young's modulus than the material of the die lower part (14) and the core rod lower part (24). The die upper part (13) and the core rod upper part (23) are formed of a material having a Young's modulus that is higher than that of the sintered body (1) by at least 50 GPa. As a result, the sintered body (1) can be densified with a small drawing margin (S). In addition, by performing the drawing without compression at the tapered parts that are parts of the die upper part (13) and the core rod upper part (23) and are formed of a material having a high Young's modulus, damage to the die can be prevented and wear of the die caused by drawing can be suppressed.
HEAT-RESISTANT SINTERED MATERIAL HAVING EXCELLENT OXIDATION RESISTANCE, WEAR RESISTANCE AT HIGH TEMPERATURES AND SALT DAMAGE RESISTANCE, AND METHOD FOR PRODUCING SAME
The purpose of this heat-resistant sintered material and a production method thereof is to obtain a heat-resistant sintered material that has excellent oxidation resistance, wear resistance at high temperatures, and salt damage resistance. This heat-resistant sintered material is characterized by: having a composition that contains, in mass%, 25-50% of Cr, 2-25% of Ni and 0.2-1.2% of P, with the balance made up of Fe and unavoidable impurities; and having a structure that comprises an Fe-Cr matrix and hard phases that are dispersed within the Fe-Cr matrix and are composed of Cr-Fe alloy grains. This heat-resistant sintered material is also characterized in that: the Cr content in the Fe-Cr matrix is 24-41% by mass; the Cr content in the hard phases is 30-61% by mass; and the intercommunicating porosity is 2% or less.
The invention of the present application is characterized in comprising a sintered compact of a plurality of grains of a Ni-Cu or Cu-Ni alloy that contains Sn, P, and C, said grains comprising 36-86% of Ni, 1-11% of Sn, 0.05-1.0% of P, and 1-9% of C (percentages given with respect to mass), the remainder comprising Cu and inevitable impurities; said invention having a structure in which pores are dispersedly formed at the boundaries of the alloy grains, and the inevitable impurity content of the matrix constituted by the alloy grains being no more than 0.6% of C, and no more than 0.15% of Si (percentages given with respect to mass).
Provided is a Cu-based sintered bearing comprising: 15-36 mass% of Ni; 3-13 mass% of Sn; 0.05-0.55 mass% of P; and 0.02-4 mass% C in total, the balance consisting of Cu and inevitable impurities, wherein the content of C forming an alloy with a matrix within Cu-Ni main-phase grains is 0.02-0.10 mass%.
Provided are a new rotating body, rotating body material, and manufacturing method for a rotating body, which make it possible to shorten the cutting distance in an inner diameter axis direction of an inner diameter surface to thereby suppress the processing cost of the inner diameter surface and manufacture an inner rotor at lower cost. An inner diameter surface (12) into which a shaft of a metallic rotating body (11) is press-fitted is provided with a processed portion (13) subjected to cutting processing at one end side, and an unprocessed portion (14) not subjected to cutting processing at the other end side. The inner diameter of the processed portion (13) is formed smaller than the inner diameter of the unprocessed portion (14). Chamfered portions are provided, respectively, in both end portions of the inner diameter surface (12), the chamfered portion (15) in the end portion at one end side is subjected to cutting processing, and the chamfered portion (6) in the end portion at the other end side is not subjected to cutting processing. An inner diameter surface (2) of a material (1) that is processed into the rotating body (11) is provided with a small-diameter portion (3) at one end side and a large-diameter portion (4) having a larger inner diameter than the small-diameter portion (3) at the other end side. A step (5) is formed between the small-diameter portion (3) and the large-diameter portion (4), and the chamfered portion (6) is formed in an end portion at the other end side.
F04C 2/10 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
F04C 15/00 - Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups
Provided is a starting material powder that is for powder metallurgy and that is capable of improving strength and density, and preventing sintered-body contamination, surface defects, and decarburization. The starting material powder for powder metallurgy is for use in the production of a sintered body obtained by sintering at 500°C or higher, wherein a metal powder and a lubricant are mixed with one another, and the lubricant is melamine cyanurate or terephthalic acid. Or, the starting material powder for powder metallurgy is for use in the production of a sintered body obtained by sintering at 500°C or higher, wherein a metal powder, a first lubricant and a second lubricant are mixed with one another, the first lubricant is melamine cyanurate or terephthalic acid, and it is preferable for the second lubricant to be erucic acid amide or stearic acid amide.
B22F 1/00 - Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
B22F 1/02 - Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition comprising coating of the powder
C10M 105/30 - Carboxylic acids or their salts having more than one carboxyl group bound to a carbon atom of a six-membered aromatic ring
C10M 105/70 - Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing nitrogen as ring hetero atom
C10N 30/00 - Specified physical or chemical property which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
The purpose of the present invention is to provide a bearing for a motor-type fuel pump that has corrosion resistance against poor-quality gasoline that includes sulfur or organic acids, that, because of resistance to wear and outstanding conformability with a coupled shaft, can be used favorably even in compact fuel pumps, and that is made of a novel Zn-P-Ni-Sn-C-Cu-based sintered alloy. The bearing is characterized by having a structure in which contained are, by weight, 3-13% Zn, 0.1-0.9% P, 10-21% Ni, 3-12% Sn, and 1-8% C, with the remainder consisting of Cu and unavoidable impurities, in which an Sn alloy phase that comprises at least 15% Sn by weight is formed on grain boundaries of a base comprising a solid solution phase of a Zn-Ni-Sn-Cu alloy, and in which the porosity is 8-18%, and free graphite is distributed in the pores.
Provided is a novel sintered bearing having abrasion resistance superior to that of conventional products. The present invention is provided with a structure in which 1-20 mass % of Ni-P alloy particles having an average particle diameter of 10-100 μm are dispersed in a Cu-based sintered alloy base metal, Fe-Cu-based sintered alloy base metal or Cu-Ni-based sintered alloy base metal; the Ni-P alloy particles are derived from a raw material powder comprising 1-12 mass % of P, with the remainder being Ni and unavoidable impurities. The Cu-based sintered alloy base metal contains 40 mass % or more of Cu. The Fe-Cu-based sintered alloy base metal contains 50 mass % or less of Fe. The Cu-Ni-based sintered alloy base metal contains 20-40 mass % of Ni and 0.1-1.0 mass % of P or 10-25 mass % of Ni, 10-25 mass % of Zn and 0.1-1.0 mass % of P.
Provided is a sliding sintered member having excellent wear resistance under high-temperature environments and excellent oxidation resistance. In the sintered member, at least one component selected from a barium compound, a strontium compound, mica, an aluminum-silicon composite oxide and alumina is dispersed as a solid lubricant in a stainless alloy selected from an austenitic stainless alloy, a martensitic stainless alloy and a ferritic stainless alloy each containing 10 to 35 mass% of Cr, wherein the content of the solid lubricant is 3 to 50 vol%. As the solid lubricant, BaSO4, BaO, BaSiO3, BaNiO3, SrSO4, Sr2CrO4, sericite, phlogopite, mullite and alumina can be used suitably.
Provided are a composite soft magnetic material, having favorable DC bias characteristics and high specific resistance, and a production method therefor. An inorganic insulative powder (3) and a coated powder obtained by coating a soft magnetic powder (1) that is coated with an insulative film (4) with a silicone resin (2) are uniformly mixed, and the resultant mixture is molded and fired. By uniformly mixing the inorganic insulative powder (3) and the coated powder obtained by coating the soft magnetic powder that is coated with the insulative film (4) with the silicone resin (2), rupture of the insulative film due to the inorganic insulative material when molding pressed powder is prevented. By uniformly dispersing the inorganic insulative material while high specific resistance is maintained, the gap between molded soft magnetic powder particles is uniformly maintained. As a result, a composite soft magnetic material is provided having high specific resistance and favorable DC bias characteristics.
H01F 1/20 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
B22F 1/00 - Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
B22F 1/02 - Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition comprising coating of the powder
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
B22F 3/24 - After-treatment of workpieces or articles
H01F 1/26 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated by macromolecular organic substances
H01F 1/33 - 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 metallic particles having oxide skin
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
[Technical Problem] Provided is an oil pump rotor that can embody the improvement of noiseless properties and volume effects. [Technical Solution] When a base circle (bi) of an inner rotor has a diameter (φbi), a first external rolling circle (Di) has a diameter (φDi), a first internal rolling circle (di) has a diameter (φdi), a base circle (bo) of an outer rotor has a diameter (φbo), a second external rolling circle (Do) has a diameter (φDo), a second external rolling circle (do) has a diameter (φdo), and an amount of eccentricity between the inner rotor and an outer rotor is e, the following formulas are satisfied: φbi = n·(φDi ＋ φdi) and φbo ＝ (n + 1)·(φDo ＋ φdo), and either φDi ＋ φdi = 2e or φDo ＋ φdo = 2e, and furthermore, φDo＞φDi, and φdi＞φdo. When a clearance between the inner rotor and the outer rotor is t, in a case of φDi ＋ φdi = 2e, the following formula is satisfied: 0.3 ≦ ((φDo ＋ φdo) - (φDi ＋ φdi ))·(n +1)/t ≦ 0.6. In the case of φDo ＋ φdo = 2e, the following formula is satisfied: 0.3 ≦ ((φDo ＋ φdo) - (φDi ＋ φdi))·n/t ≦ 0.6.
F04C 2/10 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
F04C 15/00 - Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups
38.
COMPOSITE SOFT MAGNETIC MATERIAL HAVING LOW MAGNETIC STRAIN AND HIGH MAGNETIC FLUX DENSITY, METHOD FOR PRODUCING SAME, AND ELECTROMAGNETIC CIRCUIT COMPONENT
This composite soft magnetic material having low magnetic strain and high magnetic flux density contains pure iron-based composite soft magnetic powder particles, which have been subjected to insulating treatment by means of a magnesium-containing insulating coating film or a phosphate coating film, and Fe-Si alloy powder particles, which contain 11 to 16 mass % of Si, contains 10 to 60 mass % of the Fe-Si alloy powder particles relative to the overall mass of the composite soft magnetic material, and has inter-particle boundary layers. This method for producing a composite soft magnetic material having low magnetic strain and high magnetic flux density comprises blending a pure iron-based composite soft magnetic powder, which has been subjected to insulating treatment by means of a magnesium-containing insulating coating film or a phosphate coating film, and an Fe-Si alloy powder, which contains 11 to 16 mass % of Si, so that the proportion of the Fe-Si alloy powder is 10 to 60 mass % relative to the overall mass of the composite soft magnetic material, compression molding and then firing in a non-oxidizing atmosphere. If the composite soft magnetic powder is subjected to insulating treatment by means of a magnesium-containing insulating coating film, the firing temperature is 500°C to 1000°C, and if the composite soft magnetic powder is subjected to insulating treatment by means of a phosphate coating film, the firing temperature is 350°C to 500°C.
H01F 1/33 - 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 metallic particles having oxide skin
B22F 1/00 - Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
B22F 1/02 - Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition comprising coating of the powder
H01F 1/24 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
H01F 1/26 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated by macromolecular organic substances
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
39.
SINTERED BEARING FOR MOTOR-POWERED FUEL INJECTION PUMPS
Provided is a bearing for motor-powered fuel injection pumps, which is inexpensive, has excellent corrosion resistance and abrasion resistance and is composed of a Cu-Ni-based sintered alloy. The bearing comprises, in mass%, 10-20% of Ni, 5-13% of Sn, 0.1-0.8% of P, 1-6% of C and a reminder made up by Cu and unavoidable impurities, in which an Ni-Sn-Cu-P phase containing 30 mass% or more of Sn is formed on a grain boundary and the porosity of the bearing is 8-18%. The Ni-Sn-Cu-P phase comprises, in mass%, 30-49% of Ni, 10-30% of Cu, 0.5-1.5% of P and a remainder made up by Sn and unavoidable impurities.
Provided is a Cu-based oil-containing sintered bearing which can be used in high-load applications such as a bearing used in an ABS system or a wiper motor system in an automobile, is inexpensive, and has excellent abrasion resistance and seizure resistance. The bearing comprises, in mass%, 5-40% of Ni, 3-15% of Sn, 0.5-4.0% of P, optionally 0.3-5.0% of a solid lubricant, and a remainder made up by Cu and unavoidable impurities, has a metallic structure in which a phase mainly composed of Ni and P is dispersed in a matrix, and has a porosity of 5-25%.
Provided is a novel sintered sliding member having excellent heat resistance, corrosion resistance, and abrasion resistance. The sintered sliding member includes, by mass%, 7.7% to 30.3% of Cu, 2.0% to 20.0% of Sn, and 0.3% to 7.0% of boron nitride, with the balance comprising Ni and inevitable impurities. The sintered sliding member optionally includes 0.1% to 3.0% of C or 0.1% to 0.7% of P. Porosity is 5% to 25%.
Provided is a copper-based sintered sliding member that can be used in high-load usage environments. The provided copper-based sintered member, which is age-hardened, comprises 5-30% nickel, 5-20% tin, and 0.1-1.2% phosphorus by mass, with the remainder comprising copper and unavoidable impurities. Abrasion resistance is excellent due to the existence of an alloy phase, at grain boundaries, having higher nickel, phosphorus, and tin concentrations than the mean nickel, phosphorus, and tin concentrations across the entire sintered alloy. This results in reduced cost, as expensive hard particles are not needed, and allows a copper-based sintered sliding member that can be used in high-load usage environments. Even better abrasion resistance can be obtained by including 0.3-10% by mass of at least one of the following solid lubricants: graphite, graphite fluoride, molybdenum disulfide, tungsten disulfide, boron nitride, calcium fluoride, talc, and magnesium silicate mineral powder.
C22C 9/06 - Alloys based on copper with nickel or cobalt as the next major constituent
C22C 1/04 - Making non-ferrous alloys by powder metallurgy
C22C 1/05 - Mixtures of metal powder with non-metallic powder
C22C 9/02 - Alloys based on copper with tin as the next major constituent
C22C 32/00 - Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
A novel sintered slider material is provided which has excellent wear resistance and has high heat resistance and high corrosion resistance as well. The sintered slider material contains Ni at a content of 41-90%, Sn at a content of 2-20% and/or P at a content of 0.1-1.2% (the content being based on mass), may further contain a solid lubricant at a content of 0.3-10%, and has a balance of Cu and unavoidable impurities. The material includes an alloy phase containing Sn at a concentration higher than the average concentration of Sn in the entire sintered slider material, or an alloy phase containing P at a concentration higher than the average concentration of P in the entire sintered slider material dispersed therein. The aforementioned solid lubricant is constituted of any substance selected from boron nitride, talc, calcium fluoride, graphite, and molybdenum disulfide.
Disclosed is a composite soft magnetic material which is characterized by being obtained by mixing, compacting and firing an iron powder, which has been subjected to an insulating treatment, a Sendust alloy powder and a binder. The composite soft magnetic material is also characterized by comprising a main phase in which the iron powder and the Sendust alloy powder are compacted, and a grain boundary phase which is formed around the main phase and is mainly composed of the binder, and by having a ratio of the Sendust alloy in the main phase of 5% by mass or more, but less than 20% by mass, a saturation magnetic flux density at a magnetic field of 10 kA/m of 1 T or more, a coercivity of 260 A/m or less, and an iron loss (at 0.1 T, 10 kHz) of 20 W/kg or less. Consequently, the composite soft magnetic material has characteristics of the Sendust alloy, namely a high magnetic permeability, low coercivity and low iron loss, while maintaining a high saturation magnetic flux density which is intrinsic to an iron powder. Also disclosed is a method for producing the composite soft magnetic material.
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
B22F 1/00 - Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
B22F 1/02 - Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition comprising coating of the powder
C22C 33/02 - Making ferrous alloys by powder metallurgy
H01F 1/147 - Alloys characterised by their composition
H01F 1/22 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
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.
HIGH-STRENGTH SOFT-MAGNETIC COMPOSITE MATERIAL OBTAINED BY COMPACTION/BURNING AND PROCESS FOR PRODUCING THE SAME
A soft-magnetic composite material obtained by compaction/burning. The burned material is obtained by mixing soft-magnetic particles each coated with a magnesium-containing oxide with at least one of silicone resins, low-melting glasses, and metal oxides, compacting the mixture, burning the compact in a non-oxidizing atmosphere to form a precursor for the soft-magnetic composite compacted/burned material, and then heat-treating the precursor in an oxidizing atmosphere.
H01F 1/33 - 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 metallic particles having oxide skin
B22F 1/02 - Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition comprising coating of the powder
H01F 1/24 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
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
patents
