-
公开(公告)号：US20210379657A1
公开(公告)日：2021-12-09
申请号：US17282444
申请日：2019-10-10
摘要： A production method for water-atomized metal powder includes: in a region in which the average temperature of a molten metal stream having an Fe concentration of 76.0 at % or more and less than 82.9 at % is 100° C. or more higher than the melting point, spraying primary cooling water at a convergence angle of 10° to 25°, where the convergence angle is an angle between an impact direction on the molten metal stream from one direction and an impact direction on the molten metal stream from any other direction; and in a region in which 0.0004 seconds or more have passed after an impact of the primary cooling water and the average temperature of metal powder is the melting point or higher and (the melting point+100° C.) or lower, spraying secondary cooling water on the metal powder under conditions of an impact pressure of 10 MPa or more.
-
公开(公告)号：US12030122B2
公开(公告)日：2024-07-09
申请号：US17075693
申请日：2020-10-21
申请人： JFE STEEL CORPORATION , TOKIN CORPORATION , National Institute of Advanced Industrial Science and Technology
发明人： Naomichi Nakamura , Makoto Nakaseko , Takuya Takashita , Mineo Muraki , Hoshiaki Terao , Raita Wada , Akiri Urata , Yu Kanamori , Makoto Yamaki , Koichi Okamoto , Toshinori Tsuda , Shoichi Sato , Kimihiro Ozaki
IPC分类号： B22F3/14 , B22F1/00 , B22F1/02 , B22F1/08 , B22F1/102 , B22F1/16 , B22F3/00 , B22F3/02 , B22F3/03 , C22C33/02 , C22C38/00 , C22C38/02 , C22C38/16 , C22C45/02 , H01F1/153 , H01F3/08 , H01F41/02 , H01F27/255
CPC分类号： B22F3/14 , B22F1/00 , B22F1/08 , B22F1/102 , B22F1/16 , B22F3/00 , B22F3/02 , B22F3/03 , C22C33/02 , C22C38/00 , C22C38/002 , C22C38/02 , C22C38/16 , C22C45/02 , H01F1/15308 , H01F1/15325 , H01F1/15333 , H01F1/15375 , H01F3/08 , H01F41/0246 , B22F2301/35 , B22F2304/10 , C22C2200/02 , C22C2200/04 , C22C2202/02 , H01F27/255
摘要： Provided is a method of manufacturing a soft magnetic dust core. The method includes: preparing coated powder including amorphous powder made of an Fe-B-Si-P-C-Cu-based alloy, an Fe-B-P-C-Cu-based alloy, an Fe-B-Si-P-Cu-based alloy, or an Fe-B-P-Cu-based alloy, with a first initial crystallization temperature Tx1 and a second initial crystallization temperature Tx2; and a coating formed on a surface of particles of the amorphous powder; applying a compacting pressure to the coated powder or a mixture of the coated powder and the amorphous powder at a temperature equal to or lower than Tx1−100 K; and heating to a maximum end-point temperature equal to or higher than Tx1−50 K and lower than Tx2 with the compacting pressure being applied.
-
公开(公告)号：US10589356B2
公开(公告)日：2020-03-17
申请号：US15561661
申请日：2016-03-14
发明人： Makoto Nakaseko , Yukiko Ozaki , Naomichi Nakamura
摘要： A method for producing a water-atomized metal powder, comprising applying water to a molten metal stream, dividing the molten metal stream into a metal powder, and cooling the metal powder, wherein the metal powder is further subjected to secondary cooling with cooling capacity having a minimum heat flux point (MHF point) higher than the surface temperature of the metal powder in addition to the cooling and the secondary cooling is performed from a temperature range where the temperature of the metal powder after the cooling is not lower than the cooling start temperature necessary for amorphization nor higher than the minimum heat flux point (MHF point).
-
公开(公告)号：US10010935B2
公开(公告)日：2018-07-03
申请号：US14442217
申请日：2013-12-02
IPC分类号： B22F1/00 , C22C38/00 , H01F1/20 , H01F3/08 , B22F9/08 , B22F9/20 , C21D1/26 , C21D3/02 , C21D3/04 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C33/02
CPC分类号： B22F1/0062 , B22F1/0014 , B22F9/082 , B22F9/20 , B22F2009/0828 , B22F2301/35 , B22F2304/10 , B22F2998/10 , C21D1/26 , C21D3/02 , C21D3/04 , C22C33/02 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C2202/02 , H01F1/20 , H01F3/08
摘要： The present invention provides iron powder for dust cores that has excellent compressibility and low iron loss after formation. In the iron powder for dust cores, Si content is 0.01 mass % or less, apparent density is 3.8 g/cm3 or more, the ratio of iron powder particles with a particle size of 45 μm or less is 10 mass % or less, the ratio of iron powder particles with a particle size of over 180 μm and 250 μm or less is less than 30 mass %, the ratio of iron powder particles with a particle size of over 250 μm is 10 mass % or less, and the Vickers hardness (test force: 0.245 N) of a powder cross-section is 80 Hv or less.
-
公开(公告)号：US11542579B2
公开(公告)日：2023-01-03
申请号：US16831307
申请日：2020-03-26
发明人： Hak Soo Kim , Kohsuke Ashizuka , Akio Kobayashi , Naomichi Nakamura , Masashi Fujinaga , Toshio Maetani , Hirofumi Enokido , Hisashi Sudo
摘要： The present disclosure relates to an iron-based prealloy powder having excellent strength and processability, and an iron-based alloy powder for powder metallurgy and a sinter-forged member using the same. The iron-based prealloy powder for powder metallurgy according to an embodiment of the present disclosure includes 0.5 to 5.0 wt % of Cu, 0.1 to 0.5 wt % of Mo, and a balance of Fe and other inevitable impurities. A Cu content (Cu %) and a Mo content (Mo %) satisfy the following Relational Equation (1): 0.3×Cu %+3×Mo %≤2.7 (1).
-
公开(公告)号：US20210071286A1
公开(公告)日：2021-03-11
申请号：US16831307
申请日：2020-03-26
发明人： Hak Soo KIM , Kohsuke Ashizuka , Akio Kobayashi , Naomichi Nakamura , Masashi Fujinaga , Toshio Maetani , Hirofumi Enokido , Hisashi Sudo
摘要： The present disclosure relates to an iron-based prealloy powder having excellent strength and processability, and an iron-based alloy powder for powder metallurgy and a sinter-forged member using the same. The iron-based prealloy powder for powder metallurgy according to an embodiment of the present disclosure includes 0.5 to 5.0 wt % of Cu, 0.1 to 0.5 wt % of Mo, and a balance of Fe and other inevitable impurities. A Cu content (Cu %) and a Mo content (Mo %) satisfy the following Relational Equation (1): 0.3×Cu %+3×Mo %≤2.7 (1).
-
公开(公告)号：US10207328B2
公开(公告)日：2019-02-19
申请号：US15529125
申请日：2015-11-24
发明人： Takuya Takashita , Akio Kobayashi , Naomichi Nakamura , Toshio Maetani , Akio Sonobe , Itsuya Sato
摘要： An Fe—Mo—Cu—C-based alloy steel powder for powder metallurgy has a chemical composition containing Mo: 0.2 mass % to 1.5 mass %, Cu: 0.5 mass % to 4.0 mass %, and C: 0.1 mass % to 1.0 mass %, with a balance being Fe and incidental impurities, wherein an iron-based powder has a mean particle size of 30 μm to 120 μm, and a Cu powder has a mean particle size of 25 μm or less. Despite the alloy steel powder for powder metallurgy having a chemical composition not containing Ni, a part produced by sintering a press formed part of the powder and further carburizing-quenching-tempering the sintered part has mechanical properties of at least as high tensile strength, toughness, and sintered density as a Ni-added part.
-
公开(公告)号：US20170144227A1
公开(公告)日：2017-05-25
申请号：US15129839
申请日：2015-03-13
发明人： Makoto Nakaseko , Naomichi Nakamura , Yukiko Ozaki
CPC分类号： B22F9/082 , B22F9/002 , B22F2009/0824 , B22F2009/0828 , B22F2009/0848 , B22F2009/0872 , B22F2009/0888 , B22F2301/35 , B22F2998/10 , B22F2999/00 , C22C33/0264 , C22C45/02 , B22F2203/11 , B22F2203/13 , B22F2201/10
摘要： A water-atomized metal powder is produced by dividing a molten metal stream into a metal powder by making injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more impinge on the molten metal stream and cooling the metal powder. Cooling with injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more enables can be performed not in the film boiling region but in the transition boiling region from the beginning of cooling. A gas-atomized metal powder may also be produced by dividing a molten metal stream into a metal powder by making an inert gas impinge on the molten metal stream and cooling the metal powder with injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more.
-
公开(公告)号：USRE45647E1
公开(公告)日：2015-08-11
申请号：US14187559
申请日：2014-02-24
发明人： Yukiko Ozaki , Masateru Ueta , Naomichi Nakamura
CPC分类号： B22F1/0014 , C22C38/004
摘要： A highly compressible iron powder for powder metallurgy has an optimized particle size distribution. The Vickers microhardness of the particles that do not pass through the sieve having the nominal opening of 150 μm is controlled to be at most about 110. The iron powder is suitable for production of magnetic parts having high magnetism and mechanical parts having high mechanical strength.
摘要翻译： 用于粉末冶金的高度可压缩的铁粉具有优化的粒度分布。 不通过具有150μm的公称开口的筛子的颗粒的维氏显微硬度被控制在至多约110℃。铁粉适合于生产具有高磁性的磁性部件和具有高机械强度的机械部件。
-
公开(公告)号：US11441212B2
公开(公告)日：2022-09-13
申请号：US16769240
申请日：2018-11-30
摘要： Provided is alloyed steel powder having excellent fluidity, formability, and compressibility without containing Ni, Cr, or Si. The alloyed steel powder includes iron-based alloy containing Mo, in which Mo content is 0.4 mass % to 1.8 mass %, a weight-based median size D50 is 40 μm or more, and among particles contained in the alloyed steel powder, those particles having an equivalent circular diameter of 50 μm to 200 μm have a number average of solidity of 0.70 to 0.86, the solidity being defined as (particle cross-sectional area/envelope-inside area).
-
-
-
-
-
-
-
-
-
搜索结果
22 条记录 (耗时 0.018 秒)
