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Steel for high-strength bolts which has excellent delayed fracture resistance and bolt formability, and bolt

机译：具有优异的抗延迟断裂性能和螺栓成形性的高强度螺栓用钢和螺栓

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摘要

To provide a steel for high-strength bolts, which can exhibit the sufficient delayed fracture resistance under the severe environment, and also has excellent bolt formability. The steel for high-strength bolts of the present invention includes C: 0.10 to 0.30%; and Ni: 0.4 to 0.7%, with the chemical composition being appropriately adjust, and satisfies the following formulas (1) and (2):0.85≤[C]+[Si]/7+[Mn]/5+[Ni]/20+[Cr]/9+[Mo]/2≤1.3 (1)[C]−(0.07×[Mo]+0.20×[V])≤0.20 (2).

机译：提供一种用于高强度螺栓的钢，该钢在恶劣的环境下可以表现出足够的延迟抗断裂性，并且还具有优异的螺栓成形性。本发明的高强度螺栓用钢的C：0.10〜0.30％，C：0.10〜0.30％。 Ni：0.4〜0.7％，化学成分适当调整，满足下式（1）和（2）：<？in-line-formulae description =“在线表达式” end =“ lead”？>0.85≤[C] + [Si] / 7 + [Mn] / 5 + [Ni] / 20 + [Cr] / 9+ [Mo]/2≤1.3（1）<？行内公式说明=“行内公式”结尾=“尾”？> <？行内公式说明=“行内公式”结尾=“ lead”？> [C] −（0.07×[Mo] + 0.20×[V]）≤0.20（2）。 >

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公开/公告号US10060015B2

专利类型
公开/公告日2018-08-28

原文格式PDF
申请/专利权人 KOBE STEEL LTD.;
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申请/专利号US201415022857
发明设计人 REIKO KATO;YOSUKE MATSUMOTO;MASAMICHI CHIBA;YOSHIMASA URESHINO;ATSUSHI INADA;
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申请日2014-09-16
分类号C22C38/44;C22C38/46;C22C38/50;C21D9/00;C21D1/25;F16B31/06;C22C38/00;C21D1/18;C21D6/00;C22C38/02;C22C38/04;C22C38/06;C22C38/42;
国家 US
入库时间 2022-08-21 13:03:33

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