Abstract：Some refractory metals are widely used in the fields of weaponry, communication and medical fields due to their high melting point, low steam pressure and excellent high temperature strength. Using selective laser melting (SLM) technique to print pure tungsten can solve the problems of traditional powder metallurgy technology for some complicated shapes and ultra-fine grains. The effects of energy density of SLM on the density, hardness and microstructure of the pure tungsten were studied. The results show that the density and microhardness increase with the increase of volumetric energy density (VED). The maximum relative density can reach 75%, and the microhardness reaches 485 HV, far more than traditional powder metallurgy (260 HV). The microstructure after SLM is a fine equiaxed grain with the grain size less than 1μm.
牛朋达, 李瑞迪, 袁铁锤, 王敏卜. 能量密度对选区激光熔化纯钨致密度及组织性能的影响[J]. 粉末冶金材料科学与工程, 2019, 24(1): 15-20.
NIU Pengda, LI Ruidi, YUAN Tiechui, WANG Minbo. Effects of selective laser melting energy density on density and microstructure and properties of pure tungsten. Materials Science and Engineering of Powder Metallurgy, 2019, 24(1): 15-20.
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