Research of performance of RSW on quiet steel

The quiet steel has been favored by automobile manufacturers for its advantage in shock absorption and noise reduction. However, there is less research on the welding performance of quiet steel plates. In this paper, the welding lobe of 1.0 mm quiet steel is studied. The comprehensive evaluation of spot welded joints was carried out by evaluation methods such as metallographic structure, microhardness, shear tensile and cross-tensile. The result showed that when the welding heat input was small, the interlayer of the quiet steel plate was not completely fused, and when the heat input was enough, the composite interlayer is completely fused with the steel plate, and the mechanical properties were good. The welding lobe of the quiet steel reaches 4.2 kA with good comprehensive mechanical properties and good weldability.