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

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

机译：高强度钢材料的延性裂纹萌生抵抗力和疲劳裂纹扩展抵抗力及其制造方法

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摘要

PROBLEM TO BE SOLVED: To provide a high-strength steel material for a structure, which is used in various welded structures and is superior in fatigue-crack propagation resistance and ductile-crack initiation resistance even when having repeatedly received a load, and to provide a manufacturing method therefor.;SOLUTION: This steel material comprises, by mass%, 0.03-0.30% 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 10% to 40% by an area fraction.;COPYRIGHT: (C)2007,JPO&INPIT

机译：解决的问题：提供一种用于各种焊接结构的结构的高强度钢材，即使反复承受载荷也具有优异的抗疲劳裂纹扩展性和延性裂纹萌生性。溶液：该钢材以质量％计包含0.03-0.30％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，一种或多种1.0％以下的Cu，2.0％以下的Ni，1.0％以下的Cr，1.0％以下的Mo，0.1％以下的Nb，0.1％以下的V，0.1％以下的Ti和0.005％以下的B需要，剩余的铁中不可避免地含有杂质;并且具有金相组织，该组织是贝氏体组织，马氏体组织或它们的混合结构，其包括板条的最大尺寸为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。 4μm至50μm，占面积的10％至40％。;版权所有：（C）2007，JPO＆INPIT

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公开/公告号JP2007197777A

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;
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申请/专利号JP20060018329
发明设计人 SADASUE TERUKI;IKI SATOSHI;KUBO TAKAHIRO;
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申请日2006-01-27
分类号C22C38/00;C22C38/04;C22C38/58;C21D8/02;B21B3/00;B21B1/38;
国家 JP
入库时间 2022-08-21 21:13:17

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