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1. 发明专利

JPS59110726A Preparation of ni-containing low temperature steel excellent in crack leading end opening displacement amount 失效
标题翻译：含镍低温钢在裂纹引导端开放位移量的准备
公开(公告)号：JPS59110726A
公开(公告)日：1984-06-26
申请号：JP22022982
申请日：1982-12-17
申请人： Nippon Kokan Kk
发明人： TAGAWA HISATOSHI , MATSUI KAZUYUKI , YAMADA MAKOTO , TANAKA JIYUNICHI , IZAWA TOORU , TAKESHIGE KENJI
IPC分类号： C22C38/00 , C21D8/00 , C22C38/08
CPC分类号： C21D8/005
摘要： PURPOSE:To certainly prepare the titled steel having good tensile strength and good characteristics even in steel plate strain, by a method wherein an Ni-containing steel piece in which P and S contents are prescribed is rolled under a specific condition and thereafter, accerelated cooling and tempering treatment are applied to the rolled steel piece. CONSTITUTION:An Ni-containing low temp. steel piece containing, on the basis of wt%, 7.5-10% Ni, 0.010% or less P and 0.005% or less S is heated to 1,200 deg.C or less and rolling is applied to the heated steel piece under such a condition that a cumalative draft at 950 deg.C or less is regulated to 30% or more and a finish temp. is set to 850 deg.C or less. After rolling, the rolled steel piece is cooled to a temp. 50-150 deg.C lower than the finish temp. in air and cooled to 350 deg.C or less at a cooling speed of 2.0 deg./sec or more. Subsequently, tempering processing is applied to the cooled steel piece at a temp. of AC1 or less. By this method, Ni-containing low temp. steel excellent in a crack leading end opening displacement amount is prepared.
摘要翻译：目的：即使在钢板应变中也可以制备具有良好拉伸强度和良好特性的标准钢，通过其中规定P和S含量的含镍钢板在特定条件下被轧制，然后进行相关冷却对轧制钢板进行回火处理。构成：含镍低温基于重量％，含有7.5〜10％的Ni，0.010％以下的P和0.005％以下的S的钢板被加热到1200℃以下，在这样的条件下对加热后的钢板进行轧制在950摄氏度或更低的温度下，可以调节至30％或更高的最终温度。设定为850℃以下。轧制后，将轧制钢片冷却至温度。比最终温度低50-150摄氏度。在空气中冷却至350℃以下，冷却速度为2.0度/秒以上。随后，对冷却后的钢片进行回火处理。的AC1以下。通过这种方法，含Ni低温制备出优异的裂纹前端开口位移量的钢。

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