Due to the high hardness and brittleness of high-strength automotive panels, there is a greater tendency for interface fracture failure during spot welding. By studying the welding performance of automotive panels under different welding process parameters, the fracture failure of high-strength automotive panel spot welding joints is divided into three categories, which are typical failure modes of automotive panel spot welding joints. The high-strength automotive panel spot welding joints are mainly divided into interface fracture There are three failure modes: fusion line fracture and heat affected zone fracture.
2023