发明名称 |
HIGH-STRENGTH HOT-DIP GALVANIZED STEEL SHEET HAVING EXCELLENT PLATING SURFACE QUALITY AND ADHESION, AND METHOD OF MANUFACTURING THE SAME |
摘要 |
Provided is a method of manufacturing a hot-dip galvanized steel sheet. According to an aspect of the present invention, the method may include preparing a base steel sheet, forming a iron (Fe)-plated layer on the prepared base steel sheet, oxidation heating the steel sheet having the Fe-plated layer formed thereon at a temperature ranging from 600° C. to 800° C., maintaining the heated steel sheet at a temperature ranging from 750° C. to 900° C. for 5 seconds or more in a reducing atmosphere with a dew point of between −30° C. to 5° C. including 20 ppm or less of oxygen, 1 vol % to 20 vol % of H2, and N2 as well as unavoidable gases as a remainder, cooling the maintained steel sheet, and plating the cooled steel sheet by dipping in a hot-dip galvanizing bath. |
申请公布号 |
EP2798094(A1) |
申请公布日期 |
2014.11.05 |
申请号 |
EP20120862705 |
申请日期 |
2012.12.27 |
申请人 |
POSCO |
发明人 |
KIM, MYUNG-SOO;KIM, JONG-SANG;KIM, YOUNG-HA;PARK, JOONG-CHUL |
分类号 |
C23C2/02;B32B15/01;C21D9/46;C22C38/02;C22C38/04;C22C38/06;C23C2/06;C23C2/28;C23C2/40;C23C28/00;C25D3/20;C25D5/48;C25D7/06 |
主分类号 |
C23C2/02 |
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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