选择性激光熔化成形17–4PH不锈钢研究

选择性激光熔化技术具有一次成形、节省原材料、可成形任意复杂结构工件及性能优良等特点，是17–4PH不锈钢成形研究的新方向。本文综述了近几年选择性激光熔化制备17–4PH不锈钢研究现状，包括工艺参数对17–4PH不锈钢性能的影响，热处理和热等静压对17–4PH不锈钢力学性能的改善，不同成形方式和不同后处理17–4PH不锈钢的显微组织变化，以及在选择性激光熔化成形17–4PH不锈钢过程中出现的问题和发展趋势。

Research on 17–4PH stainless steels by selective laser melting

Selective laser melting technology (SLM) is a new direction in the forming research of the 17–4PH stainless steels because of the advantages of one-time forming, raw material saving, arbitrary complex structure workpiece forming, and excellent performance. The research status of the 17–4PH stainless steels prepared by SLM in recent years was reviewed in this paper, including the effect of process parameters on the properties of the 17–4PH stainless steels, the improvement on the mechanical properties of the 17–4PH stainless steels by heat treatment and hot isostatic pressing (HIP), the microstructure changes of the 17–4PH stainless steels treated by the different forming ways and the different post-treatments, and the problems and development trend of the 17–4PH stainless steels by SLM.