HEAT TREATMENT METHOD FOR HETEROGENEOUS CUTTING WELDING OF ALUMINUM ALLOY PLATED HIGH STRENGTH STEEL FOR HOT STAMPING

摘要

The present invention relates to laser welding of automotive parts manufactured by connecting blanks of different materials. More specifically, the present invention relates to a hot stamping and a cutting welding process of an Al alloy-plated material to produce a part having a physical property equal or superior to the same of base metal. According to one embodiment of the present invention, a Taylor welded blank welding method is provided and comprises following steps of: (a) providing a differentially coated steel sheet having different thickness, strength and material; (b) forming a ferrite intermetallic compound on the surface of a welded unit of a differently-coated steel sheet; and (c) welding which is bonding the differently-coated steel sheet to each other.;COPYRIGHT KIPO 2018