研究了板材的多层喷射沉积制备工艺过程中出现的热应力及其对材料成形的影响规律．提出界面热应力、层间热应力和不均匀沉积热应力均为主要的热应力，进而对相关的板材成形实验现象作出了合理的解释．在综合考虑工艺参数、热应力和板材成形三者关系的基础上，优化工艺参数，制备出５００ｍｍ３００ｍｍ２０ｍｍ的耐热铝合金ＦＶＳ０８１２板材 The thermal stress occurred in the process of multilayer spray deposition and its influence on the material forming were studied. It is put forward that the interface thermal stress, interlaminar thermal stress and inhomogeneous thermal stress are the main thermal stresses, and then the related sheet forming experiments are reasonably explained. On the basis of comprehensively considering the relationship between process parameters, thermal stress and sheet metal forming, the process parameters were optimized to prepare a 500mm  300mm  20mm sheet of heat-resistant aluminum alloy FVS0812