| 发明名称 |
METHOD FOR PRODUCING COLD-ROLLED STEEL SHEET |
| 摘要 |
A method for producing cold-rolled steel sheets which comprises the steps of: producing slabs containing 0.001-0.003 wt. % C, 0.004 wt. % or less N and 0.03-0.20 wt. % P, providing that P(wt. %)xN(wt. %)</=3x10-4 wt. % is satisfied; hot-rolling the slabs into hot-rolled steel strips; cold-rolling the hot-rolled steel strips at 60-95% reduction ratio into cold-rolled steel strips; and annealing continuously the cold-rolled strips at temperature of recrystallization temperature to Ac3 transformation point temperature. The slabs further include 0.0005-0.0030 wt. % B. The hot-rolling is performed at finishing temperature ranging Ar3 transfromation point to Ar3 transformation +100 DEG C., at cooling temperature of 750 DEG C. and less.
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| 申请公布号 |
US5078809(A) |
申请公布日期 |
1992.01.07 |
| 申请号 |
US19880258481 |
申请日期 |
1988.10.17 |
| 申请人 |
NIPPON KOKAN KABUSHIKI KAISHA |
发明人 |
KINOSHITA, MASAYUKI;NISHIMOTO, AKIHIKO;URABE, TOSHIAKI;SAKAMOTO, AKIRA |
| 分类号 |
C21D8/02;C21D8/04;C21D9/46;C22C38/00;C22C38/06 |
主分类号 |
C21D8/02 |
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