Method for preparing thin-wall blank through laser metal deposition and follow-up rolling

The invention belongs to the technical field of laser additive manufacturing, and provides a method for preparing a thin-wall blank through laser metal deposition and follow-up rolling. The method comprises the following steps that the thin-wall blank is designed; laser metal deposition technology parameters are determined; a roller follow-up rolling technology scheme and technology parameters are determined; laser printing is conducted on the nth layer, and follow-up rolling is completed; the step 2 to the step 4 are repeated; and post-treatment is performed on the thin-wall blank. According to the method, the problems that when the thin-wall blank is prepared through an existing laser metal deposition technology, the limiting width size of a molten pool under high power influences the forming wall thickness of the blank, so that the blank with the wall thickness smaller than 2 mm is difficult to prepare, and the blank is poor in surface quality and low in precision due to convex-concave peaks caused by inte