首页> 外国专利> HIGH-STRENGTH STEEL MATERIAL SUPERIOR IN DELAYED FRACTURE RESISTANCE AND FATIGUE-CRACK PROPAGATION RESISTANCE, AND MANUFACTURING METHOD THEREFOR

HIGH-STRENGTH STEEL MATERIAL SUPERIOR IN DELAYED FRACTURE RESISTANCE AND FATIGUE-CRACK PROPAGATION RESISTANCE, AND MANUFACTURING METHOD THEREFOR

机译：高强度钢材料的抗断裂断裂和抗疲劳裂纹扩展性能及其制造方法

页面导航

摘要
著录项
相似文献

摘要

PROBLEM TO BE SOLVED: To provide a high strength steel material for a construction, which is used in various welded structures and is superior in fatigue-crack propagation resistance and delayed fracture resistance even when having repeatedly received a load, and to provide a manufacturing method therefor.;SOLUTION: This steel material comprises, by mass%, 0.05-0.35% C, 0.01-0.50% Si, 0.5-2.0% Mn, 0.05% or less P, 0.02% or less S, one or more of 1.0% or less Cu, 2.0% or less Ni, 1.0% or less Cr, 1.0% or less Mo, 0.1% or less Nb, 0.1% or less V, 0.1% or less Ti and 0.005% or less B, as needed, and the balance Fe with unavoidable impurities; and has a metallographic structure that is a bainitic structure, a martensitic structure or a structure mixed thereof, which includes carbides, nitrides or carbonitrides with a maximum size of 0.5 μm or smaller in lath, and that includes ferrite with a grain size of 4 μm to 50 μm in an amount of 3% to 20% by an area fraction.;COPYRIGHT: (C)2007,JPO&INPIT

机译：解决的问题：提供一种用于建筑的高强度钢材，该材料可用于各种焊接结构，即使反复承受载荷也具有优异的抗疲劳裂纹扩展性和耐延迟断裂性，并提供一种制造方法解决方案：该钢材以质量％计包括0.05-0.35％的C，0.01-0.50％的Si，0.5-2.0％的Mn，0.05％或更少的P，0.02％或更少的S，1.0％的一种或多种根据需要，Cu，2.0％以下Ni，1.0％以下Cr，1.0％以下Mo，0.1％以下Nb，0.1％以下V，0.1％以下Ti和0.005％以下B铁中余有不可避免的杂质;并且具有金相组织，其是贝氏体结构，马氏体结构或它们的混合结构，其包括最大板条尺寸为0.5μm或更小的碳化物，氮化物或碳氮化物，并且包括晶粒尺寸为0.5μm的铁素体。 4微米至50微米，占面积的3％至20％。;版权所有：（C）2007，JPO＆INPIT

著录项

公开/公告号JP2007197776A

专利类型
公开/公告日2007-08-09

原文格式PDF
申请/专利权人 JFE STEEL KK;
展开▼

申请/专利号JP20060018328
发明设计人 SADASUE TERUKI;IKI SATOSHI;KUBO TAKAHIRO;
展开▼

申请日2006-01-27
分类号C22C38/00;C22C38/04;C22C38/58;C21D8/02;
国家 JP
入库时间 2022-08-21 21:13:17

相似文献

专利
外文文献
中文文献