Effects of gas-atomized pressure on morphology and properties of TC4 powder prepared by electrode-induced gas atomization
JIN Ying1,2, LIU Ping1,2, SHI Jinguang1,2, WENG Ziqing1,2, GU Xiaolong1,2
1. Zhejiang Asia General Soldering & Brazing Material Co., Ltd, Hangzhou 310030, China;
2. Zhejiang provincial key laboratory of soldering & brazing materials and technology, Hangzhou 310030, China
Abstract TC4 powder was fabricated by electrode-induced melting gas atomization. The properties of TC4 powder were characterized by laser particle size analyzer, scanning electron microscopy (SEM), powder comprehensive-performance analyzer and true density analyzer. The effects of atomization pressure on the yield of powders with particle size <53 μm, mean size, morphology, hollow powder, apparent density and fluidity were studied. The results show that the mean size of TC4 powder and the fine-powder yield increases with increasing gas-atomized pressure (3.5-6.0 MPa). The powder with more spherical and less satellite-ball, mean size of 69.4 μm, fine particle yield of 23.0%, the relative density of 99.1%, the apparent density of 2.40 g/cm3, the flow ability of 22.4 s/50 g can be obtained when the gas-atomized pressure is 3.5 MPa. When the gas-atomized pressure is 6.0 MPa, the mean size of TC4 powder is 48.6 μm and the yield of powder ranging from 0 to 53 μm is 40.8%. With further increasing the gas-atomized pressure, the mean size of the powder increases, the yield of fine powder decreases, the number of satellite-ball powder increases, the degree of sphericity becomes worse. The apparent density and fluidity decrease with increasing gas-atomized pressure.
JIN Ying,LIU Ping,SHI Jinguang, et al. Effects of gas-atomized pressure on morphology and properties of TC4 powder prepared by electrode-induced gas atomization[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(3): 312-317.
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2018, Vol. 23 
