公开(公告)号：US20130183191A1

公开(公告)日：2013-07-18

申请号：US13820865

申请日：2011-07-25

申请人： Masaki Kaizuka ,  Mutsuhisa Nagahama

发明人： Masaki Kaizuka ,  Mutsuhisa Nagahama

IPC分类号： C22C38/60 ,  C22C38/44 ,  C22C38/28 ,  C22C38/26 ,  C22C38/00 ,  C22C38/20 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/50 ,  C22C38/24

CPC分类号： C22C38/60 ,  C21D1/32 ,  C21D9/40 ,  C21D2211/003 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/44 ,  C22C38/50 ,  F16C33/62

摘要： Provided is a bearing steel capable of exhibiting excellent cold workability in cold working that follows spheroidizing annealing and also capable of ensuring excellent abrasion resistance and rolling fatigue characteristics as a bearing member or the like. The bearing steel contains C: 0.9 to 1.10%, Si: 0.05 to 0.49%, Mn: 0.1 to 1.0%, P: not more than 0.05% (excluding 0%), S: not more than 0.05% (excluding 0%), Cr: 0.03 to 0.40%, Al: not more than 0.05% (excluding 0%), N: 0.002 to 0.025%, Ti: not more than 0.0030% (excluding 0%), and 0: not more than 0.0025% (excluding 0%), with the remainder being iron and unavoidable impurities. The average aspect ratio of cementite is not more than 2.00, the average circle-equivalent diameter of cementite is 0.35 to 0.6 μm, and the number density of cementite having a circle-equivalent diameter of not less than 0.13 μm is not less than 0.45/μm2.

摘要翻译： 提供一种能够在球磨退火之后的冷加工中表现出优异的冷加工性的轴承钢，并且还能够确保作为轴承部件等的优异的耐磨性和滚动疲劳特性。 轴承钢含有C：0.9〜1.10％，Si：0.05〜0.49％，Mn：0.1〜1.0％，P：0.05％以下（不含0％），S：0.05％以下（不含0％） ，Cr：0.03〜0.40％，Al：不大于0.05％（不包括0％），N：0.002〜0.025％，Ti：0.0030％以下（不含0％），0：0.0025％ 不包括0％），其余为铁和不可避免的杂质。 渗碳体的平均纵横比不大于2.00，渗碳体的平均圆当量直径为0.35至0.6μm，圆当量直径不小于0.13μm的渗碳体的数密度不小于0.45 / 妈妈2

公开(公告)号：US20130174943A1

公开(公告)日：2013-07-11

申请号：US13823814

申请日：2011-08-10

申请人： Nariaki Okamoto ,  Mutsuhisa Nagahama

发明人： Nariaki Okamoto ,  Mutsuhisa Nagahama

IPC分类号： C21D8/00 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/42 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/22 ,  C22C38/20 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/54

CPC分类号： C21D8/005 ,  B22D11/225 ,  C21D1/06 ,  C21D8/0226 ,  C21D8/0247 ,  C21D9/28 ,  C21D9/40 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

摘要： A case hardened steel with excellent cold forgeability and excellent impact properties after case hardening processing contains C, Si, Mn, S, Cr, Al, Ti, Nb, B, and N, with the balance being iron and unavoidable impurities. Of precipitates containing Ti and/or Nb, precipitates having a size of not less than 20 μm2 are at a number density of not more than 1.0/mm2. Of precipitates containing Ti and/or Nb, precipitates having a size of more than 5 μm2 and less than 20 μm2 and containing Mn and S are at a number density of more than 0.7/mm2 and not more than 3.0/mm2. The ferrite fraction is more than 77% by area.

摘要翻译： 具有优异的冷锻性和硬化处理后的优异的冲击性的表面硬化钢含有C，Si，Mn，S，Cr，Al，Ti，Nb，B和N，余量为铁和不可避免的杂质。 含有Ti和/或Nb的析出物，尺寸不小于20mum2的析出物的数量密度不大于1.0 / mm 2。 含有Ti和/或Nb的析出物，具有大于5mum2且小于20mum2且含有Mn和S的析出物的数量密度大于0.7 / mm 2且不大于3.0 / mm 2。 铁素体部分按面积计算超过77％。

公开(公告)号：US20120168035A1

公开(公告)日：2012-07-05

申请号：US13395696

申请日：2010-09-30

申请人： Takehiro Tsuchida ,  Tomokazu Masuda ,  Mutsuhisa Nagahama

发明人： Takehiro Tsuchida ,  Tomokazu Masuda ,  Mutsuhisa Nagahama

IPC分类号： C22C38/02 ,  C22C38/06 ,  C22C38/20 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/04 ,  C22C38/08

CPC分类号： C23C8/22 ,  C21D1/06 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/06 ,  C21D9/30 ,  C21D9/32 ,  C21D2211/001 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/50 ,  C22C38/54 ,  C23C8/30 ,  C23C8/80

摘要： Disclosed is a steel for machine structural use including 0.05-0.8% of C, 0.03-2% of Si, 0.2-1.8% of Mn, 0.1-0.5% of Al, 0.0005-0.008% of B, and 0.002-0.015% of N, and including 0.03% of P or less (excluding 0%), 0.03% of S or less (excluding 0%), and 0.002% of 0 or less (excluding 0%), with the remainder comprising iron and unavoidable impurities. The ratio of BN/A1N precipitated in the steel is 0.020-0.2. Also disclosed is a case hardened steel component in which the ratio of BN/AlN deposited on the carburized or carbonitrided component surface is 0.01 or less and a manufacturing method for same. The steel for machine structural use exhibits excellent machinability in continuous cutting at high speeds using cemented carbide tools, and in interrupted cutting at low speeds using high-speed steel tools, as well as excellent impact performance, even after being subjected to a heat treatment such as quenching and tempering. Furthermore, the case hardened steel component exhibits excellent fatigue resistance, and particularly excellent pitting resistance.

摘要翻译： 公开了一种用于机械结构用途的钢，其包括0.05-0.8％的C，0.03-2％的Si，0.2-1.8％的Mn，0.1-0.5％的Al，0.0005-0.008％的B和0.002-0.015％的 N，并且包括0.03％P以下（不含0％），0.03％以下（不含0％），0.002％以下（0％以下）（不包括0％），其余为铁和不可避免的杂质。 钢中析出的BN / AlN比为0.020-0.2。 还公开了沉积在渗碳或碳氮共混组分表面上的BN / AlN的比例为0.01以下的表面硬化钢部件及其制造方法。 机械结构用钢在高速连续切削中使用硬质合金工具，在使用高速钢工具的低速断续切削以及优异的冲击性能方面表现出优异的机械加工性，即使在经受热处理之后 作为淬火和回火。 此外，表面硬化钢部件表现出优异的耐疲劳性，特别优异的耐点蚀性。