发明公开
EP2407569A1 ZINC BASED ALLOY COATED STEEL HAVING SUPERIOR RESISTANCE TO LIQUID METAL EMBRITTLEMENT AND CRACKING
审中-公开
采用合金对锌基涂覆的钢具有优良的耐防止液体金属和断裂
- 专利标题： ZINC BASED ALLOY COATED STEEL HAVING SUPERIOR RESISTANCE TO LIQUID METAL EMBRITTLEMENT AND CRACKING
- 专利标题（中）： 采用合金对锌基涂覆的钢具有优良的耐防止液体金属和断裂
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申请号： EP10750839.2申请日： 2010-03-09
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公开(公告)号： EP2407569A1公开(公告)日： 2012-01-18
- 发明人: FUJIMOTO, Nobukazu , KODAMA, Shinichi , FUJIWARA, Susumu
- 申请人： NISSHIN STEEL CO., LTD.
- 申请人地址： 4-1 Marunouchi 3-chome Chiyoda-ku Tokyo 100-8366 JP
- 专利权人： NISSHIN STEEL CO., LTD.
- 当前专利权人： NISSHIN STEEL CO., LTD.
- 当前专利权人地址： 4-1 Marunouchi 3-chome Chiyoda-ku Tokyo 100-8366 JP
- 代理机构： Wagner, Karl H.
- 优先权： JP2009057171 20090310; JP2010043628 20100227
- 国际公布： WO2010104086 20100916
- 主分类号： C22C38/00
- IPC分类号： C22C38/00 ; C22C18/04 ; C22C38/14 ; C22C38/58
摘要：
[Problem] To provide a zinc-based alloy-plated steel material in which low-carbon steel is used as the base material and which is excellent in resistance to molten-metal embrittlement cracking and has good workability.
[Means for Resolution]
A zinc-based alloy-plated steel material excellent in resistance to molten-metal embrittlement cracking, which has a zinc-based alloy-plating layer on the surface of a steel base material that has a chemical composition comprising, as % by mass, C: 0.010 to 0.100%, Si: at most 1.50%, Mn: at most 2.00%, P: at most 0.100%, S: at most 0.030%, N: at most 0.0050%, Ti: at most 0.050%, and B: 0.0003 to 0.0100%, with a balance of Fe and inevitable impurities, and having the value L to be defined by the following formula, L = {(Ti/48) + (B/11) }/(N/14), of at least 5.50, and has a metallographic structure comprising ferrite: 10 to 99% by volume with a balance of bainite, pearlite, cementite or martensite.
[Means for Resolution]
A zinc-based alloy-plated steel material excellent in resistance to molten-metal embrittlement cracking, which has a zinc-based alloy-plating layer on the surface of a steel base material that has a chemical composition comprising, as % by mass, C: 0.010 to 0.100%, Si: at most 1.50%, Mn: at most 2.00%, P: at most 0.100%, S: at most 0.030%, N: at most 0.0050%, Ti: at most 0.050%, and B: 0.0003 to 0.0100%, with a balance of Fe and inevitable impurities, and having the value L to be defined by the following formula, L = {(Ti/48) + (B/11) }/(N/14), of at least 5.50, and has a metallographic structure comprising ferrite: 10 to 99% by volume with a balance of bainite, pearlite, cementite or martensite.
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