发明名称 |
HOT-DIP GALVANIZED HIGH-STRENGTH STEEL SHEET HAVING SUPERIORWORKABILITY AND GALVANIZABILITY AND METHOD FOR PRODUCING THE SAME |
摘要 |
A hot-dip galvanized high-strength steel sheet having superior workability and galvanizability containing: 0.01% to 0.20% by weight of C; 1.0% by weight or less of Si; more than 1.5% to 3.0% by weight of Mn; 0.10% by weight or less of P; 0.05% by weight or less of S; 0.10% by weight or less of Al; 0.010% by weight or less of N; 0.010% to 1.0% by weight in total of at least one element selected from the group consisting of Ti, Nb, and V; and the balance being Fe and incidental impurities; in which the steel sheet has the metal structure in which the areal rate of the ferrite phase is 50% or more, the ferrite phase has an average grain diameter of 10 .mu.m or less, and the thickness of a band-like structure composed of the second phase satisfies the relationship Tb/T .ltoreq. 0.005, where Tb is the average thickness in the sheet thickness direction of the band-like structure and T is the thickness of the steel sheet, and a method for producing the same. To provide a method for producing a hot-dip galvanized high-strength steel sheet in which superior workability and high strength are obtained and moreover satisfactory galvanizability is obtained when galvanizing is performed using facilities such as a continuous galvanizing line.
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申请公布号 |
CA2353492(C) |
申请公布日期 |
2004.10.26 |
申请号 |
CA20002353492 |
申请日期 |
2000.10.13 |
申请人 |
KAWASAKI STEEL CORPORATION |
发明人 |
OSAWA, KAZUNORI;SUZUKI, YOSHITSUGU;FURUKIMI, OSAMU;SHINOHARA, AKIO;SAKATA, KEI |
分类号 |
C21D8/02;C21D8/04;C22C38/04;C22C38/08;C22C38/12;C22C38/14;C22C38/16;C23C2/02;C23C2/28;(IPC1-7):C22C38/12;C21D9/46;C23C2/06 |
主分类号 |
C21D8/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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