Cold-rolled steel sheets
    6.
    发明授权
    Cold-rolled steel sheets 失效
    冷轧钢板

    公开(公告)号:US4750952A

    公开(公告)日:1988-06-14

    申请号:US755500

    申请日:1985-07-15

    IPC分类号: C21D8/04 C22C38/14

    摘要: A cold-rolled steel sheet for deep drawing having an improved bake hardenability, which comprises 0.005-0.015 wt % of C, not more than 1.0 wt % of Si, not more than 1.0 wt % of Mn, not more than 0.15 wt % of P, 0.005-0.10 wt % of Al, not more than 0.003 wt % of S and not more than 0.004 wt % of N provided that S+N is not more than 0.005 wt %, and Ti satisfying 1.ltoreq.Ti*/C.ltoreq.20, in which Ti*(%)=Ti(%)-(48/14)N(%)-(48/32)S(%). Such a cold-rolled steel sheet is obtained by continuously annealing the steel sheet after the cold rolling, provided that a residence time over a temperature region above recrystallization temperature is within 300 seconds.

    摘要翻译: 一种用于深拉伸的冷轧钢板,具有改善的烘烤淬透性,其包含0.005-0.015重量%的C,不大于1.0重量%的Si,不大于1.0重量%的Mn,不超过0.15重量% P,0.005-0.10重量%的Al,不大于0.003重量%的S和不大于0.004重量%的N,只要S + N不大于0.005重量%,并且满足1≤Ti* / 其中Ti *(%)= Ti(%) - (48/14)N(%) - (48/32)S(%)。 这样的冷轧钢板是在冷轧后对钢板进行连续退火而得到的,只要在再结晶温度以上的温度区域的停留时间在300秒以内即可。