Effect of Solution Temperature on Microstructure and Mechanical Properties of Selective Laser Melting GH3625 Alloy

GH3625 alloy was formed by selective laser melting (SLM). The single factor method was used to study the effect of solution temperature on the microstructure and mechanical properties of GH3625 alloy formed by SLM were studied, and its mechanism was preliminarily discussed. The results show that with the increase of the solution temperature, the Laves phase is completely dissolved, A large amounts of the needle-like δ phase and carbides are dispersed and precipitated, and the microstructure tends to be uniform, the Vickers hardness and tensile strength of the GH3625 alloy show a trend of increasing first and then decreasing. At 900 ℃, the Vickers hardness and tensile strength reached the maximum, 324 HV and 990.82 MPa, respectively. The tensile elongation of the specimen remains above 34%, and the fracture surface with dimple, the alloy is plastic failure.