发明名称 |
HOT-DIP GALVANIZED STEEL SHEET HAVING HIGH STRENGTH AND ALSO BEING EXCELLENT IN FORMABILITY AND GALVANIZING PROPERTY |
摘要 |
<p>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 s 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. <IMAGE></p> |
申请公布号 |
EP1146132(A1) |
申请公布日期 |
2001.10.17 |
申请号 |
EP20000966468 |
申请日期 |
2000.10.13 |
申请人 |
JFE STEEL CORPORATION |
发明人 |
OSAWA, KAZUNORI;SAKATA, KEI;FURUKIMI, OSAMU;SUZUKI, YOSHITSUGU;SHINOHARA, AKIO |
分类号 |
C21D8/02;C21D8/04;C22C38/04;C22C38/08;C22C38/12;C22C38/14;C22C38/16;C23C2/02;C23C2/28;(IPC1-7):C22C38/00;C21D9/46 |
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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