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1. 发明公开

EP1876256A4 CARBURIZED INDUCTION-HARDENED COMPONENT 有权
标题翻译：渗碳感应淬火COMPONENT
公开(公告)号：EP1876256A4
公开(公告)日：2010-08-04
申请号：EP06732467
申请日：2006-04-28
申请人： AISIN AW CO , NIPPON STEEL CORP
发明人： TANIGUCHI TAKAO , SHIRAI HISAO , OHBAYASHI KOUJI , OKADA KAZUAKI , KANISAWA HIDEO , KOZAWA SHUJI
IPC分类号： C22C38/60 , C21D1/06 , C21D1/10 , C21D9/32 , C21D9/40 , C22C38/00
CPC分类号： C21D9/40 , C21D1/00 , C21D1/06 , C21D1/10 , C21D7/06 , C21D9/32 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , Y02P10/253

2. 发明公开

EP1889929A4 STEEL MEMBERS, METHOD FOR HEAT TREATMENT OF THE SAME, AND PROCESS FOR PRODUCTION THEREOF 有权
标题翻译：钢构件，热处理方法进行生产和方法
公开(公告)号：EP1889929A4
公开(公告)日：2010-08-11
申请号：EP06810452
申请日：2006-09-22
申请人： AISIN AW CO
发明人： TANIGUCHI TAKAO , SHIRAI HISAO , OHBAYASHI KOJI , OKADA KAZUAKI , KANISAWA HIDEO , KOZAWA SHUJI
IPC分类号： C21D9/32 , C21D1/00 , C21D1/06 , C21D1/10 , C21D9/00 , C22C38/00 , C22C38/38 , C23C8/22
CPC分类号： C23C8/22 , C21D1/06 , C21D1/10 , C21D9/32 , C22C38/02 , C22C38/04 , C22C38/22 , C22C38/24 , C22C38/38 , C23C8/80 , Y02P10/253

3. 发明公开

EP1243664A4 BAR OR WIRE PRODUCT FOR USE IN COLD FORGING AND METHOD FOR PRODUCING THE SAME 有权
标题翻译：棒线材产品，其用在产低温锻造工艺
公开(公告)号：EP1243664A4
公开(公告)日：2004-11-17
申请号：EP00985851
申请日：2000-12-22
申请人： NIPPON STEEL CORP
发明人： OCHI TATSURO , KANISAWA HIDEO , NAITO KEN-ICHIRO
IPC分类号： C21D8/06 , C21D1/32 , C21D9/52 , C22C38/00 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/60
CPC分类号： C21D9/525 , C21D1/32 , C21D8/06 , C21D2211/002 , C21D2211/008 , C21D2211/009 , C22C38/002 , C22C38/04 , C22C38/06 , C22C38/22
摘要： A bar or wire product for use in cold forging, characterized in that it comprises a steel having the chemical composition, in mass %: C: 0. 1 to 0. 6 %, Si: 0. 01 to 0. 5 %, Mn: 0. 2 to 1. 7 %, S: 0. 001 to 0. 15 %, Al: 0. 015 to 0. 05 %, N: 0. 003 to 0. 025%, P: 0. 035 % or less, O: 0. 003 % or less and balance: Fe and inevitable impurities, and it has, in the region from the surface thereof to the depth of the radius thereof x 0. 15, a structure wherein ferrite accounts for 10 area % or less and the balance is substantially one or more of martensite, bainite and pearlite, and the average hardness in the region from the depth of the radius thereof x 0. 5 to the center thereof is less than that of the surface layer thereof by 20 or more of HV; and a method for producing the bar or wire product. The bar or wire product is excellent in the ductility after spheroidizing and thus allows the prevention of occurrence of cracks in a steel product during cold forging, which has conventionally been a problem in manufacturing structural parts for a machine by cold forging.

4. 发明公开

EP0922783A4 NON-TEMPERED STEEL FOR MECHANICAL STRUCTURE 失效
标题翻译：未固化的钢机械结构
公开(公告)号：EP0922783A4
公开(公告)日：2000-08-23
申请号：EP98921815
申请日：1998-05-26
申请人： NIPPON STEEL CORP
发明人： TAKADA HIROMASA , HASHIGUCHI TETSURO , KANISAWA HIDEO
IPC分类号： C22C38/00 , C22C38/12 , C22C38/14 , C22C38/28 , C22C38/60 , C22C38/02
CPC分类号： C22C38/12 , C22C38/60
摘要： A medium-carbon non-tempered steel for mechanical structures which does not significantly deform even when broken in an as-hot worked state, the hot working being hot rolling, hot forging or the like, and has an inexpensive ferrite-pearlite structure. The steel comprises on the weight basis 0.3 to 0.6 % C, 0.1 to 2.0 % Si, 0.1 to less than 0.4 % Mn, 0.01 to 0.1 % P, 0.01 to 0.2 % S, and more than 0.15 to 0.4 % V with the balance consisting of Fe and unavoidable impurities, the content of N in the unavoidable impurities being less than 0.005 %. The steel may further contain one or two of 0.005 to 0.05 % Al, 0.005 to 0.05 % Ti, and 0.05 to 0.2 % Nb and/or one or two of 0.1 to 0.5 % Cr and 0.1 to 0.5 % Mo.

5. 发明公开

EP1045044A4 STEELS FOR COLD FORGING AND PROCESS FOR PRODUCING THE SAME 有权
标题翻译：维多利亚ZU DEREN HERSTELLUNGSTÄHLENZUM KALTSCHMIEDEN
公开(公告)号：EP1045044A4
公开(公告)日：2002-08-07
申请号：EP99937950
申请日：1999-03-04
申请人： NIPPON STEEL CORP
发明人： HASHIMURA MASAYUKI , KANISAWA HIDEO , OKONOGI MAKOTO
IPC分类号： C22C38/00 , C22C38/02 , C22C38/04 , C22C38/34 , C22C38/60 , C21D8/00
CPC分类号： C22C38/02 , C22C38/04
摘要： A steel for cold forging which has not undergone annealing and which comprises 0.1-1.0 wt.% carbon, 0.1-2.0 wt.% silicon, 0.01-1.50 wt.% manganese, up to 0.100 wt.% phosphorus, up to 0.500 wt.% sulfur, up to 0.005 wt.% dissolved nitrogen, and iron and unavoidable impurities as the remainder, has a structure having a pearlite content of 120x[carbon amount (%)] % or lower, has an outermost-layer hardness of 450x[carbon amount (%)]+90 or higher in terms of HV, and shows excellent softening properties in annealing; a process for producing the steel; and a steel for cold forging which has undergone annealing and which comprises the same ingredients as the above and has a structure in which more than 20 % of the carbon is present as graphite and the graphite has an average grain diameter of 10x[carbon amount (%)]1/3 νm or smaller and a maximum grain diameter of 20 νm or smaller.
摘要翻译：本发明提供一种冷锻钢，退火时的表层硬度和软化性优异，其含有以重量％计，C：0.1〜1.0％，Si：0.1〜2.0％，Mn：0.01〜1.50％ P：不大于0.100％，S：不大于0.500％，sol。 N：不大于0.005％，余量由Fe和不可避免的杂质组成，其中钢结构中的珠光体比不大于120×（C％）％，最外表层硬度至少为450×（C％）+ 90（维氏硬度HV）及其制造方法。本发明还提供一种用于冷锻钢的结构，其中石墨量与钢中碳含量的比例超过20％，石墨的平均粒径不大于10×（C％）<1 / 3μm，最大粒径不大于20μm。

6. 发明公开

EP1178126A4 BAR OR WIRE PRODUCT FOR USE IN COLD FORGING AND METHOD FOR PRODUCING THE SAME 有权
标题翻译：酒吧或WIRE FOR USE冷锻及其制备方法
公开(公告)号：EP1178126A4
公开(公告)日：2004-04-14
申请号：EP00987721
申请日：2000-12-22
申请人： NIPPON STEEL CORP
发明人： OCHI TATSURO , KANISAWA HIDEO , NAITO KEN-ICHIRO
IPC分类号： C21D1/32 , C21D8/06 , C21D9/52 , C22C38/00 , C22C38/04 , C22C38/06 , C22C38/28 , C22C38/32 , C22C38/60
CPC分类号： C22C38/28 , C21D1/32 , C21D8/06 , C21D9/525 , C21D2221/10 , C22C38/04 , C22C38/06 , C22C38/32
摘要： A bar or wire product for use in cold forging, characterized in that it comprises a steel having the chemical composition, in mass %: C: 0.1 to 0.65 %, Si: 0.01 to 0.5 %, Mn: 0.2 to 1.7 %, S: 0.001 to 0.15 %, Al: 0.015 to 0.1 %, B: 0.0005 to 0.007%, P: 0.035 % or less, N: 0.01 % or less, O: 0.003 % or less and balance: Fe and inevitable impurities, and it has, in the region from the surface thereof to the depth of the radius thereof x 0.15, a structure wherein ferrite accounts for 10 area % or less and the balance is substantially one or more of martensite, bainite and pearlite, and the average hardness in the region from the depth of the radius thereof x 0.5 to the center thereof is less than that of the surface layer thereof by 20 or more of HV; and a method for producing the bar or wire product. The bar or wire product is excellent in the ductility after spheroidizing and thus allows the prevention of occurrence of cracks in a steel product during cold forging, which has conventionally been a problem in manufacturing structural parts for a machine by cold forging.

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