发明名称 |
HIGH-STRENGTH HOT-DIP GALVANIZED STEEL SHEET AND HIGH-STRENGTH ALLOYED HOT-DIP GALVANIZED STEEL SHEET HAVING EXCELLENT BENDING WORKABILITY AND MINIMAL STRENGTH DIFFERENCE BETWEEN CENTER PART AND END PARTS IN SHEET WIDTH DIRECTION, AND METHOD FOR MANUFACTURING SAME |
摘要 |
Provided are: a high-strength hot-dip galvanized steel sheet in which bending workability of the high-strength hot-dip galvanized steel sheet is improved, and in which strength difference between a center part and end parts in the sheet width direction is reduced; and a method for manufacturing a high-strength hot-dip galvanized steel sheet. The steel sheet is a hot-dip galvanized steel sheet having a hot-dip galvanizing layer on a surface of a base steel sheet containing: C, Mn, P, S, and Al; Ti and B in amounts satisfying equation (1); and N; and Si as needed; the remainder comprising iron and unavoidable impurities; the metallographic structure of the base steel sheet having martensite, bainite, and ferrite, the ratios of each with respect to the overall metallographic structure being 50 area% or more of the martensite, 15-50 area% of the bainite, and 5 area% or less of the ferrite. (1): 0.005 × [Mn] + 0.02 × [B]1/2 + 0.025 <= [Ti] <= 0.15 |
申请公布号 |
WO2013146606(A1) |
申请公布日期 |
2013.10.03 |
申请号 |
WO2013JP58355 |
申请日期 |
2013.03.22 |
申请人 |
KABUSHIKI KAISHA KOBE SEIKO SHO(KOBE STEEL, LTD.) |
发明人 |
IKEDA, MUNEAKI;MIURA, MASAAKI |
分类号 |
C22C38/00;C21D9/46;C22C38/60;C23C2/02;C23C2/06;C23C2/28 |
主分类号 |
C22C38/00 |
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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