The invention provides a micro-vibration auxiliary
laser lap
welding method for aluminum-
silicon coating hot forming steel. A
laser welding process is adopted, auxiliary micro-vibration is used in the
welding process, and a well-formed aluminum-
silicon coating hot forming steel
laser lap welding seam can be obtained. According to the method, laser process parameters are controlled, a
mechanical vibration external field is applied on the basis, and vibration parameters are adjusted, so that the aggregation degree of an
aluminum coating dissolved in the welding seam is effectively reduced, the structure of the welding seam is optimized, and welding defects are reduced, so that a high-quality lap
welding joint is obtained, and the method is suitable for welding of the aluminum-
silicon coating hot forming steel for automobiles; and compared with a traditional laser
lap joint method, an aluminum-silicon coating on the surface of the hot forming steel does not need to be removed, the
lap joint welding technological process is simplified, the production efficiency is improved, meanwhile, due to application of
mechanical vibration, the aggregation degree of the
aluminum coating in the welding seam is relieved, grains are refined, the
residual stress of the joint is reduced, and the strength of the lap
welding joint is improved.