High strength steels are used in automobiles because of their excellent properties in terms of yield strength, strain hardening behavior, strain distribution capability and collision energy absorption. At present, the high-strength steel used in automotive stamping parts mainly include bake-hardening steel (BH steel), dual-phase steel (DP steel), phase-change induced plasticity steel (TRIP steel) 97% of the advanced concept models (ULSAB-AVC) introduced by the ULSAB are high-strength steels and the proportion of advanced high-strength steel in the whole vehicle exceeds 60%, of which the proportion of duplex steel Will account for automotive steel plate 74%. Now, a large number of IF steel to the main series of soft steel will be high-strength steel plate series of alternative, high-strength low-alloy steel will be dual-phase steel and ultra-high strength steel plate instead.