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发明授权
US06911268B2 High strength hot-dip galvanized or galvannealed steel sheet having improved plating adhesion and press formability and process for producing the same 有权
具有改善的电镀附着力和冲压成型性的高强度热浸镀锌或合金化热镀锌钢板及其制造方法

High strength hot-dip galvanized or galvannealed steel sheet having improved plating adhesion and press formability and process for producing the same
摘要：
Disclosed are a high strength hot-dip galvanized or galvannealed steel sheet, which has improved press formability and plating adhesion and is useful as a member for automobile, building, electric or other members, and a process for producing the same.This high strength hot-dip galvanized or galvannealed steel sheet comprises: (a) a steel sheet substrate comprising, by weight, carbon (C): 0.05 to 0.2%, silicon (Si): 0.2 to 2.0%, manganese (Mn): 0.2 to 2.5%, and aluminum (Al): 0.01 to 1.5%, the silicon and the aluminum having a mutual relationship represented by formula 0.4(%)≦Si+0.8 Al (%)≦2.0(%), the steel sheet substrate further comprising at least one member selected from the group consisting of (i) 0.003 to 1.0% of tin (Sn), (ii) 0.005 to 1.0% in total of at least one member selected from antimony (Sb), bismuth (Bi), and selenium (Se), (iii) 0.005 to 1.0% in total of at least one member selected from beryllium (Be), magnesium (Mg), calcium (Ca), and zirconium (Zr), and (iv) 0.005 to 1.0% in total of at least one member selected from scandium (Sc), yttrium (Y), lanthanum (La), and cerium (Ce), with the balance consisting of iron (Fe) and unavoidable impurities, the volume fraction of retained austenite in the steel structure being 2 to 20%; and (b) a zinc (Zn) coating layer provided on said steel sheet substrate.
摘要（中）：

公开了一种高强度热浸镀锌或合金化热镀锌钢板，其具有改进的冲压成形性和电镀附着力，并且可用作汽车，建筑，电气或其它构件的构件，及其制造方法。 该高强度热浸镀锌或合金化热镀锌钢板包括：（a）重量含有碳（C）：0.05〜0.2％，硅（Si）：0.2〜2.0％，锰（Mn）： 0.2〜2.5％，铝（Al）：0.01〜1.5％，由式0.4表示的相互关系的硅和铝（％）<= Si + 0.8Al（％）<= 2.0（％），钢 片状基材还包含选自（i）锡（Sn）0.003〜1.0％，（ii）0.005〜1.0％的至少一种选自锑（Sb），铋（Sb），铋 Bi）和硒（Se），（iii）选自铍（Be），镁（Mg），钙（Ca）和锆（Zr）中的至少一种的总计为0.005〜1.0％，（iv） 总计含有选自钪（Sc），钇（Y），镧（La）和铈（Ce））中的至少一种的铁素体（Fe）和不可避免的杂质中的至少一种的0.005〜1.0％ 的钢结构中的残余奥氏体 2〜20％; 和（b）设置在所述钢板基材上的锌（Zn）被覆层。

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