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1.发明申请ALLOY STEEL POWDER FOR POWDER METALLURGY AND METHOD OF PRODUCING IRON-BASED SINTERED BODY 审中-公开用于粉末冶金的合金钢粉和生产基于铁的烧结体的方法公开(公告)号：US20160136727A1
公开(公告)日：2016-05-19
申请号：US14787882
申请日：2014-04-25
发明人： Toshio MAETANI , Shigeru UNAMI
CPC分类号： B22F1/0003 , B22F1/0085 , B22F1/025 , B22F3/16 , B22F9/04 , B22F2301/35 , B22F2302/45 , C21D6/00 , C22C33/0264 , C22C38/00 , C22C38/002 , C22C38/12 , C22C38/16
摘要： Provided is an alloy steel powder for powder metallurgy containing an iron-based powder as a main component that is capable of achieving both high strength and high toughness in a sintered body using the same. In the alloy steel powder, the iron-based powder contains a reduced powder, and Mo content with respect to a total amount of the alloy steel powder is 0.2 mass % to 1.5 mass %, Cu powder content with respect to a total amount of the alloy steel powder is 0.5 mass % to 4.0 mass % and graphite powder content with respect to a total amount of the alloy steel powder is 0.1 mass % to 1.0 mass %.
摘要翻译： 本发明提供一种粉末冶金用合金钢粉末，其含有铁基粉末作为主要成分，其能够在使用其的烧结体中实现高强度和高韧性。 在合金钢粉末中，铁基粉末含有还原粉末，相对于合金钢粉末的总量的Mo含量为0.2质量％〜1.5质量％，Cu粉末的含量相对于 合金钢粉末为0.5质量％〜4.0质量％，相对于合金钢粉末的总量，石墨粉末含量为0.1质量％〜1.0质量％。
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公开(公告)号：US20220331860A1
公开(公告)日：2022-10-20
申请号：US17754021
申请日：2020-06-16
发明人： Kohsuke ASHIZUKA , Nao NASU , Takuya TAKASHITA , Shigeru UNAMI
摘要： Provided is an alloyed steel powder for powder metallurgy which has excellent compressibility and can be used to produce a sintered body that obtains improved strength simply by sintering. The alloyed steel powder for powder metallurgy contains Cu: 1.0 mass % or more and 8.0 mass % or less, Mo: more than 0.50 mass % and 2.00 mass % or less, and at least one selected from the group consisting of V: 0.05 mass % or more and 0.50 mass % or less, Nb: 0.02 mass % or more and 0.40 mass % or less, and Ti: 0.02 mass % or more and 0.40 mass % or less, with the balance consisting of Fe and inevitable impurities.
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公开(公告)号：US20210114093A1
公开(公告)日：2021-04-22
申请号：US16965299
申请日：2018-12-12
发明人： Hanako SHIMAMOTO , Shigeru UNAMI
IPC分类号： B22F1/02 , C10M105/60
摘要： Provided is a mixed powder for powder metallurgy that contains a readily available compound as a lubricant, does not need to contain a stain-causing metal soap, has excellent ejection properties, and can exhibit excellent fluidity without deteriorating the ejection properties even in the case of further containing carbon black. The mixed powder for powder metallurgy contains (a) an iron-based powder and (b) a lubricant, where the lubricant (b) contains a specific aliphatic amine.
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公开(公告)号：US20200338637A1
公开(公告)日：2020-10-29
申请号：US16613122
申请日：2018-06-12
发明人： Shigeru UNAMI , Masato OYA
摘要： The powder mixture for powder metallurgy includes a raw material powder, a binder, and a graphite powder, where the raw material powder contains an iron-based powder in a content of 90 mass % or more of the raw material powder, the graphite powder has an average particle size of less than 5 μm, a ratio in mass of the binder to the sum the raw material powder and the graphite powder is 0.10 mass % to 0.80 mass %, a ratio of mass of the graphite powder to the sum of mass of the raw material powder and mass of the graphite powder is 0.6 mass % to 1.0 mass %, surface of the raw material powder is covered with at least a part of the binder, and surface of the binder covering the surface of the raw material powder is covered with at least a part of the graphite powder.
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公开(公告)号：US20230158565A1
公开(公告)日：2023-05-25
申请号：US17594561
申请日：2020-01-28
IPC分类号： B22F1/10 , B22F1/00 , C10M115/08 , C10M115/04
CPC分类号： B22F1/10 , B22F1/09 , C10M115/08 , C10M115/04 , B22F2301/10 , B22F2301/35 , C10M2215/285 , C10M2207/1265 , C10M2215/265 , C10M2207/2815 , C10M2207/2835 , C10M2207/2895 , C10N2040/246
摘要： A mixed powder for powder metallurgy comprises: an iron-based powder; and a lubricant, wherein the lubricant consists of a low-melting-point lubricant having a melting point of 86° C. or less and a high-melting-point lubricant having a melting point of more than 86° C., the low-melting-point lubricant has at least one of an amide group, an ester group, an amino group, and a carboxyl group, a ratio R1 of the low-melting-point lubricant to whole of the lubricant is 5 mass % or more and less than 90 mass %, a ratio R2 of a mass of a free lubricant to a mass of a binding lubricant is 0 or more and 15 or less, and an amount R3 of the low-melting-point lubricant contained as the free lubricant is less than 0.10 parts by mass with respect to 100 parts by mass of the iron-based powder.
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公开(公告)号：US20210394264A1
公开(公告)日：2021-12-23
申请号：US17271204
申请日：2019-09-20
发明人： Hanako SHIMAMOTO , Shigeru UNAMI
IPC分类号： B22F1/00 , B22F3/02 , C10M105/38 , C10M129/74 , C10M169/04
摘要： Provided is a mixed powder for powder metallurgy that contains a readily available compound as a lubricant, does not need to contain a stain-causing metal soap, has excellent ejection properties and compressibility, and can exhibit excellent fluidity without deteriorating the ejection properties or the compressibility even in the case of further containing carbon black. The mixed powder for powder metallurgy comprising an (a) iron-based powder and a (b) lubricant, wherein the (b) lubricant is an ester of disaccharide and fatty acid represented by R—COOH, and the R is an alkyl group having 11 or more carbon atoms or an alkenyl group having 11 or more carbon atoms.
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7.发明申请公开(公告)号：US20210197258A1
公开(公告)日：2021-07-01
申请号：US17059210
申请日：2019-04-22
发明人： Masato OYA , Shigeru UNAMI
摘要： Provided is a powder mixture for powder metallurgy that has excellent fluidity, can be ejected from a green compacting die with little force, and can suppress die galling in forming. The powder mixture comprises: a raw material powder; a copper powder; a binder; a graphite powder; and carbon black. The raw material powder contains an iron-based powder in an amount of 90 mass % or more with respect to the raw material powder. An average particle size of the graphite powder is less than 5 μm. Additive amounts of the binder, the graphite powder, the copper powder, and the carbon black are in specific ranges. A surface of the raw material powder is coated with at least part of the binder. A surface of the binder is coated with at least part of the graphite powder, at least part of the copper powder, and at least part of the carbon black.
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公开(公告)号：US20240342792A1
公开(公告)日：2024-10-17
申请号：US18579400
申请日：2022-05-09
发明人： Takuya TAKASHITA , Naoki YAMAMOTO , Makoto NAKASEKO , Shigeru UNAMI , Masanari TOMOZAWA , Akiri URATA , Miho CHIBA
CPC分类号： B22F1/102 , H01F1/26 , H01F41/0246 , B22F2201/02 , B22F2203/11 , B22F2301/35 , B22F2302/45 , B22F2998/10
摘要： Provided is an iron-based soft magnetic powder that may be used in producing a dust core having a low iron loss. The iron-based soft magnetic powder has a crystallinity of 10% or less, volume-based median circularity (C50) of 0.85 or more, and when heated to 400° C. at a heating rate of 3° C./min and held at 400° C. for 20 min in a nitrogen atmosphere, then allowed to naturally cool to room temperature, number density of Cu clusters in the powder of 1.00×103/μm3 or more and 1.00×106/m3 or less, and average Cu concentration of the Cu clusters of 30.0 at % or more.
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公开(公告)号：US20230290552A1
公开(公告)日：2023-09-14
申请号：US18000288
申请日：2021-04-27
IPC分类号： H01F1/20 , H01F27/255 , H01F41/02
CPC分类号： H01F1/20 , H01F27/255 , H01F41/0246
摘要： Provided is an iron-based powder for dust core with which a dust core with low iron loss and high insulation properties can be obtained. In the iron-based powder for dust core of the present disclosure, a median particle size calculated based on cumulative volume frequency of particles of the iron-based powder for dust core is 150 μm or less, and cumulative volume frequency of the particles with an aspect ratio of 0.70 or less is 70% or less, and a median aspect ratio calculated based on cumulative volume frequency is 0.60 or more.
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10.发明申请公开(公告)号：US20220380873A1
公开(公告)日：2022-12-01
申请号：US17755826
申请日：2020-11-12
发明人： Kohsuke ASHIZUKA , Nao NASU , Takuya TAKASHITA , Shigeru UNAMI
摘要： Provided is an alloyed steel powder for powder metallurgy that has excellent compressibility and enables obtaining a sintered body having improved strength as sintered. An alloyed steel powder for powder metallurgy comprises: Cu: 2.0 mass % or more and 8.0 mass % or less; Mo: more than 0.50 mass % and 2.00 mass % or less; one or both of Mn: 0.1 mass % or more and 1.0 mass % or less and Cr: 0.3 mass % or more and 3.5 mass % or less; and a balance consisting of Fe and inevitable impurities, wherein the alloyed steel powder contains particulate oxide, and a total amount of Mn and Cr in the particulate oxide is 0.15 mass % or less with respect to 100 mass % of the alloyed steel powder, and a number ratio of particulate oxide in contact with Cu of FCC structure to the particulate oxide is 50% or more.
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