Effect of Solution Temperature on the Microstructure and Properties of 17-4PH High-Strength Steel Samples Formed by Selective Laser Melting

Samples of 17-4PH high-strength steel were processed by selective laser melting (SLM) and solution-processed. The effects the solution temperature on microstructure mechanical properties samples studied. is primarily composed martensite, with a small number austenite phases, contains many dislocations. After treatment, grain size gradually increased, yielding typical martensite. subjected to an aging treatment after treatment. Precipitates formed in samples, conducive improving their strength hardness. Vickers hardening wear first increased then decreased increasing temperature. at 1040 °C for 2 h 480 4 h, 392 HV0.5, friction coefficient was approximately 0.6. These values were, respectively, 7% 5% higher than those untreated samples.