发明名称 |
METHOD OF PRODUCING HOT-DIP GALVANNEALED STEEL SHEET |
摘要 |
A method of producing a hot-dip galvannealed steel sheet from a very-low-carbon cold- rolled steel sheet containing not less than 0.01 wt% but not more than 0.1 wt% of Ti, by subjecting the cold rolled steel sheet to a process conducted in a continuous hot-dip galvanizing system including a heat treatment, hot-dip galvanizing and a subsequent galvannealing. The method is characterized by the steps of: subjecting the cold-rolled steel sheet to a degreasing and an acid cleaning; subjecting the degreased and acid-cleaned steel sheet to a heat treatment conducted in a reducing gas atmosphere; and cooling the heat-treated steel sheet at a temperature not lower than 380 DEG C but not higher than the hot-dip galvanizing bath temperature, before the steel sheet is subjected to the hot-dip galvanizing. The very-low-carbon cold- rolled steel sheet contains, besides not less than 0.01 wt% but not more than 0.1 wt% of Ti, not more than 0.005 wt% of C, not less than 0.01 wt% but not more than 0.1 wt% of A l , not less than 0.01 wt% but not more than 0.1 wt% of Ti, and the balance substantially incidental inclusions and Fe. |
申请公布号 |
CA2038504(A1) |
申请公布日期 |
1991.09.21 |
申请号 |
CA19912038504 |
申请日期 |
1991.03.18 |
申请人 |
KAWASAKI STEEL CORPORATION |
发明人 |
ISOBE, MAKOTO;OHORI, MANABU;HASHIGUCHI, KOICHI;YAMATO, KOJI;HANAZAWA, TOSHITAKE |
分类号 |
C23C2/02;C23C2/06;C23C2/28;(IPC1-7):C23C2/02;C23C20/06 |
主分类号 |
C23C2/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|