发明名称 |
METHOD FOR MANUFACTURING ZINC COATED STEEL SHEET HAVING EXCELLENT COATING ADHESION AND ZINC COATED STEEL SHEET PRODUCED USING THE SAME |
摘要 |
<p>The present invention relates to a method to manufacture a galvanized steel sheet having excellent coating adhesion, and a galvanized steel sheet manufactured thereof. According to an embodiment of the present invention, the method to manufacture a galvanized steel sheet having excellent coating adhesion comprises: a step of preparing a matrix steel sheet; a step of primary heating the matrix steel sheet at a heating rate of 2.5-4.5°C/s at 500-650°C by charging the prepared matrix steel sheet to a non-oxidation furnace; a step of secondary heating the primary heated matrix steel sheet at 750-850°C in a reducing atmosphere; a step of cooling the secondary heated matrix steel sheet; and a step of forming a galvanized layer on the matrix steel sheet by dipping the cooled steel sheet in a plating bath. In the primary heating step, a gas comprising at least one selected from a group consisting of 16-50 volume% of CO_2, residual N_2, H_2O, and CO is charged to the non-oxidation furnace.</p> |
申请公布号 |
KR20150073299(A) |
申请公布日期 |
2015.07.01 |
申请号 |
KR20130160815 |
申请日期 |
2013.12.20 |
申请人 |
POSCO |
发明人 |
KIM, YOUNG HA;KIM, MYUNG SOO;KIM, JONG SANG |
分类号 |
C23C2/06;C22C38/00;C23C2/02;C23C2/28 |
主分类号 |
C23C2/06 |
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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