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HIGHEST BUILDING AUTHORISED COAL EFFICIENCY AND PROCEDURE FOR ITS MANUFACTURING

机译:最高建设授权煤炭效率和制造程序

摘要

A high-strength structural steel having excellent cold bendability, according to one embodiment of the present invention, comprises, by wt%, 0.02-0.1% of C, 0.01-0.6% of Si, 1.7-2.5% of Mn, 0.005-0.5% of Al, 0.02% or less of P, 0.01% or less of S, 0.0015-0.015% of N, and the balance of Fe and other inevitable impurities, wherein an outer surface layer part and an inner central part thereof are microstructurally divided in a thickness direction, the surface layer part can comprise tempered austenite as a matrix structure, and the central part can comprise bainitic ferrite as a matrix structure.
机译:根据本发明的一个实施方案,具有优异的冷稳定性的高强度结构钢,包括通过Wt%,0.02-0.1%的C,0.01-0.6%的Si,1.7-2.5%Mn,0.005-0.5 Al的%,0.02%或更低的P,0.01%或更低的S,0.0015-0.015%n,以及Fe和其他不可避免的杂质的平衡,其中外表面层部分和其内部中心部分是微结构划分的 在厚度方向上,表面层部分可以包括回火奥氏体作为基质结构,并且中心部分可以包括贝氏体铁氧体作为基质结构。

著录项

  • 公开/公告号EP3901305A4

    专利类型

  • 公开/公告日2021-10-27

    原文格式PDF

  • 申请/专利权人 POSCO;

    申请/专利号EP20190898344

  • 发明设计人 CHO JAE-YOUNG;YI IL-CHEOL;KANG SANG-DEOK;

    申请日2019-12-06

  • 分类号C22C38/04;B21B37/74;C21D1/19;C21D1/20;C21D1/22;C21D6;C21D8/02;C22C38;C22C38/02;C22C38/06;C22C38/08;C22C38/12;C22C38/14;C22C38/16;C22C38/18;

  • 国家 EP

  • 入库时间 2022-08-24 21:55:18

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