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高强钢按组织和性能特征可划分为三代:第一代高强钢以铁素体为基体,其抗拉强度和断后伸长率的乘积小于15 GPa·%,是目前汽车用钢中增长最快的一类产品,在国际上已趋于成熟,其成分一般为低碳钢;第二代高强钢为全奥氏体组织,其抗拉强度和断后伸长率的乘积在50 GPa·%以上,由于应用成本等问题,在国际上也属于钢厂引导用户应用的阶段;第三代高强钢以贝氏体、马氏体等高强度相为基体,其抗拉强度
High-strength steel can be divided into three generations by organization and performance characteristics: The first generation of high-strength steel with ferrite as matrix, the product of tensile strength and elongation at break less than 15 GPa ·%, is the fastest growing automotive steel Of a class of products, has become more mature in the world, its composition is generally low-carbon steel; the second generation of high-strength steel is fully austenitic, the tensile strength and elongation at break product of more than 50 GPa% , Due to the application of cost and other issues, also belong to the international steel mills guide the user application stage; third-generation high-strength steel bainite, martensite and other high-strength phase as the matrix, the tensile strength