Abstract：In this paper, the effect of laser direct manufacturing (LDM) on the structure and mechanical properties of 17-4PH samples in different atmosphere was studied. The results show that the deposited and heat-treated samples have higher tensile strength and hardness due to the increase of oxygen and nitrogen content in the atmosphere. Under the condition of argon chamber, the temperature of heat accumulation of substrate is higher, the porosity of sample decreases significantly, and the formation of reversed austenite results in the decrease of sample strength.
王 瑜，王 德. 气氛条件对激光直接成形17-4PH不锈钢组织与性能的影响[J]. 粉末冶金工业, 2020, 30(01): 64-68.
WANG Yu, WANG De. The effect of atmospheric conditions on microstructure and properties of 17-4PH stainless steel by laser direct manufacturing. Powder Metallurgy Industry, 2020, 30(01): 64-68.
2020, Vol. 30 
