HIGH-STRENGTH STEEL SHEET AND PROCESS FOR PRODUCING MOLTEN STEEL FOR HIGH-STRENGTH STEEL SHEET
    3.
    发明公开
    HIGH-STRENGTH STEEL SHEET AND PROCESS FOR PRODUCING MOLTEN STEEL FOR HIGH-STRENGTH STEEL SHEET 有权
    高强度钢板及其制造方法液体熔点钢高强度钢

    公开(公告)号:EP2312004A4

    公开(公告)日:2014-03-19

    申请号:EP09762566

    申请日:2009-06-15

    摘要: A high-strength steel sheet includes: 0.03 to 0.20% of C, 0.08 to 1.5% of Si, 0.5 to 3.0% of Mn, 0.05% or less of P, 0.0005% or more of S, 0.008 to 0.20% of acid-soluble Ti, 0.0005 to 0.01 % ofN, more than 0.01% of acid-soluble Al, and 0.001 to 0.04% of one or both of Ce and La in terms of mass%; and the balance including Fe and inevitable impurities. The ratio of (Ce+La)/acid-soluble Al is equal to or more than 0.1 and the ratio of (Ce+La)/S is in the range of 0.4 to 50 in a mass base, and the density of the number of inclusions, having a circle equivalent diameter of 2 µm or less, which are present in the steel sheet is equal to or more than 15/mm 2 .

    摘要翻译: 的高强度钢板包括:C:0.03〜0.20%以下,Si:0.08〜1.5%,Mn为0.5〜3.0%,0.05%或更少的P,0.0005%以上的S,0.008至酸的0.20% 可溶的Ti,0.0005〜0.01%至OFN,人数超过00:01酸可溶性Al的%,和0.001%至0.04%的一个或以质量%计两者Ce和La中的; 和其余为Fe和不可避免的包括杂质。 (铈+ La)的比率/酸可溶性Al是等于或大于0.1和(铈+ La)的比率/ S为0.4〜50的质量基的范围内,并且数密度 夹杂物中,具有2微米或更小,这是存在于钢板中的当量圆直径等于或大于15个/ mm 2。