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| Research of parameters on the effect of CoCr alloys pherical powders produced
by RF plasma |
| LU Chao1，XIAO Mengzhi1，QU Yuebo1，2，WEI Xiaohong2，LIU Ruijun2，
ZHANG Ruihua1，2 |
| 1Central Iron and Steel Research Institute，Beijing 100081，China；2Hard-ware Knife Cut Industrial
Technology Research Institute of Yangjiang，Yangjiang 529533，China |
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Abstract In this paper，the plasma spheroidization technology was used for the surface-treatment of cobalt-chromium
alloy powders which were used in selective laser melting additive manufacturing process. The results show
that powders with good sphericity and surface morphology can be obtained under the optimized spheroidization
process parameters.There is little change of the microstructure before and after spheroidization，mainly cellular
crystal，and the dendritic structure increases with the increases of powder particle size. Laser particle size analyzer
shows that the particle size of cobalt-chromium alloy powder increases after plasma spheroidization，mainly due to
the evaporation of fine powders.This experiment is helpful to solve the recycling problem of selective laser melting
powder materials.
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Received: 11 April 2019
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Corresponding Authors:
张瑞华（1970—），男，博士，研究员，主要研究方向为先进激光加工、金属增材制造及高性能合金粉末的制备。
E-mail: 983220026@qq.com
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2020, Vol. 30 
