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1. 发明授权

US5252153A Process for producing steel bar wire rod for cold working 失效
标题翻译：生产用于冷加工的钢筋线材的工艺
公开(公告)号：US5252153A
公开(公告)日：1993-10-12
申请号：US896187
申请日：1992-06-10
申请人： Tatsuro Ochi , Yoshiro Koyasu , Yukio Noguchi
发明人： Tatsuro Ochi , Yoshiro Koyasu , Yukio Noguchi
IPC分类号： C21D1/32 , C21D8/06 , C22C38/00 , C22C38/04
CPC分类号： C21D8/06 , C21D1/32 , C21D2211/003
摘要： A steel comprising 0.1 to 1.5% of C and 0.25 to 2.0% of Mn is heated to 900.degree. to 1250.degree. C., and the heated steel is hot-rolled at a temperature in the range of from Ar.sub.3 to (Ar.sub.3 +200).degree. C. or Arcm to (Arcm+200).degree. C. with a total reduction of area of 30% or more. The hot-rolled material is cooled to complete a ferrite/pearlite transformation or a pro-eutectoid cementite/pearlite transformation. The transformed material is subjected to finish hot rolling at a temperature in the range of from (Ac.sub.1 -400) to Ac.sub.1 .degree. C. with a total reduction ratio of 10 to 70%. If necessary, the material after the finish hot rolling is cooled to 300.degree. C. at an average cooling rate of 1.degree. C./sec or less. A spheroidization annealing of the steel bar wire rod produced according to the process of the present invention enables a good spheroidized texture to be formed.

2. 发明授权

US5545267A Steel product for induction-hardened shaft component and shaft component using the same 失效
标题翻译：用于感应淬火轴组件的钢制品和使用其的轴组件
公开(公告)号：US5545267A
公开(公告)日：1996-08-13
申请号：US335773
申请日：1994-11-10
申请人： Tatsuro Ochi , Yoshiro Koyasu
发明人： Tatsuro Ochi , Yoshiro Koyasu
IPC分类号： C22C38/00 , C22C38/22 , C22C38/60
CPC分类号： C22C38/22 , C22C38/001 , C22C38/60 , Y10S148/904
摘要： The present invention provides a steel product, for all induction-hardened shaft component, which can prevent quench crack and has an excellent torsional strength of not less than 160 kgf/mm.sup.2, and a shaft component using the steel product.The subject matter of the present invention resides in a steel product for an induction-hardened shaft component comprising C: 0.35 to 0.70%, Si: more than 0.15 to 2.5%, Mn: 0.2 to 1.5%, Cr: 0.20 to 1.5%, Mo: 0.05 to 0.5%, Al: 0.015 to 0.05%, N: 0.002 to 0.02% and other ingredients, reduced amounts of P, Cu and O, further comprising particular amounts of Ti, B and the like, and an induction-hardened shaft component using the steel product, which shaft component has an average in-section hardness HVa of not less than 560, a grain size number of prior-austenite in an induction-hardened layer of not less than 9 and a surface residual stress of not more than -80 kgf/mm.sup.2.
摘要翻译： PCT No.PCT / JP94 / 00403 Sec。 371日期：1994年11月10日 102（e）日期1994年11月10日PCT 1994年3月14日PCT公布。公开号WO94 / 20645 日期1994年9月15日本发明提供一种用于所有感应淬火轴部件的钢产品，其可以防止淬火裂纹，并且具有不低于160kgf / mm2的优异的扭转强度，以及使用钢产品的轴部件。本发明的主题在于一种用于感应淬火轴组件的钢产品，包括C：0.35至0.70％，Si：大于0.15至2.5％，Mn：0.2至1.5％，Cr：0.20至1.5％ Mo：0.05〜0.5％，Al：0.015〜0.05％，N：0.002〜0.02％等成分，减少量的P，Cu，O，进一步含有特定量的Ti，B等，以及感应淬火使用钢制品的轴部件，该轴部件的平均截面硬度HVa不小于560，感应硬化层中的先前奥氏体的晶粒数不小于9，表面残余应力不为9 大于-80 kgf / mm2。

3. 发明授权

US5660648A Microalloyed steel for hot forging free of subsequent quenching and tempering, process for producing hot forging, and a hot forging 失效
标题翻译：用于热锻的微合金钢不需要随后的淬火和回火，生产热锻的方法和热锻
公开(公告)号：US5660648A
公开(公告)日：1997-08-26
申请号：US347360
申请日：1995-01-05
申请人： Hiromasa Takada , Yoshiro Koyasu , Motohide Mori , Masami Suzuki
发明人： Hiromasa Takada , Yoshiro Koyasu , Motohide Mori , Masami Suzuki
IPC分类号： C21D6/00 , C21D7/13 , C21D8/00 , C22C38/00 , C22C38/14 , C22C38/24 , C22C38/38 , C22C38/60
CPC分类号： C21D8/005 , C21D7/13 , C22C38/24 , C22C38/60 , C21D2211/002 , C21D6/005
摘要： The present invention provides a steel material for a microalloyed part having a high strength in a hot worked state. A microalloyed steel for a high strength hot forging comprising specified amounts of C, Si, Mn, Cr, S, V and N, and Al and/or Ti, having a carbon equivalent in a definite range, and exhibiting a bainite transformation starting point in a definite range. A microalloyed steel for a high strength hot forging comprising specified amounts of C, Si, Mn, Cr, S, V, N and Ca, and Al and/or Ti, having a carbon equivalent in a definite range, and exhibiting a bainite transformation starting point in a definite range. Said steel material has a tensile strength of at least 900 MPa when it is in a hot forged, and non-quenched and tempered state. Automobile parts can be made small and light by the use of the steel of the invention.
摘要翻译： PCT No.PCT / JP94 / 00568 Sec。 371 1995年1月5日第 102（e）日期1995年1月5日PCT 1994年4月5日PCT PCT。 WO94 / 23085 PCT公开日期：1994年10月13日本发明提供一种在热加工状态下具有高强度的微合金部件用钢材。一种用于高强度热锻造的微合金钢，其包含规定量的C，Si，Mn，Cr，S，V和N以及具有一定碳含量的Al和/或Ti，并显示贝氏体转变起点在一定范围内。一种含有规定量的C，Si，Mn，Cr，S，V，N，Ca，Al和/或Ti的高强度热锻用微合金化钢，其碳当量在一定范围内，并呈现贝氏体转变起点在一定范围内。所述钢材在处于热锻和非淬火回火状态时的拉伸强度至少为900MPa。汽车零件可以通过使用本发明的钢制成小而轻。

4. 发明授权

US4806178A Non-heat refined steel bar having improved toughness 失效
标题翻译：具有改善韧性的非精炼钢筋
公开(公告)号：US4806178A
公开(公告)日：1989-02-21
申请号：US942960
申请日：1986-12-16
申请人： Yoshiro Koyasu , Yutaka Tsuchida , Nobukazu Suzuki
发明人： Yoshiro Koyasu , Yutaka Tsuchida , Nobukazu Suzuki
IPC分类号： C22C38/38 , C22C38/28
CPC分类号： C22C38/38
摘要： Improved toughness of forging is obtained without quenching and tempering by controlling the steel composition to: 0.05% to less than 0.15% C.; 0.10-1.00% Si; 0.50-3.00% Mn; 1.60-4.20% Mn+Cr; 0.010-0.030% Ti; 0.005-0.0030% B; 0.01-0.05% Al; and 0.0060% or less of N.
摘要翻译：通过将钢组合物控制在0.05％以下且小于0.15％的温度下，可获得锻造韧性提高而不进行淬火回火。 0.10-1.00％Si; 0.50-3.00％Mn; 1.60-4.20％Mn + Cr; 0.010-0.030％Ti; 0.005-0.0030％B; 0.01-0.05％Al; 和0.0060％以下的N.

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