TAYLOR WELDED HOT STAMPING METHOD AND STEEL PARTS USING THE SAME

摘要

PURPOSE: A Taylor-welded hot stamping method and a molded object with locally different strengths are provided to enable vehicle components to be manufactured to have locally different strengths since different materials are bonded. CONSTITUTION: A Taylor-welded hot stamping method comprises next steps. A blank material(A) with a hardening property and another blank material(B) without a hardening property are prepared(S21). The material A and the material B are bonded by laser welding(S22). The bonded materials are heated at a molding temperature(S23). The heated material is hot-rolled by press mold to form a molded object(S24). In a state the press mold is closed, the press mold is cooled to quickly cool the molded object(S25). Oxidized scale is removed from the material B(S26).