论文部分内容阅读
W-Ta spherical powdered feedback for selective laser melting(SLM)were synthesized in two routes:(i) radio frequency(RF) plasma torch spheroidized pure tungsten powders mixing pure tantalum powders(ii)radio frequency(RF)plasma torch spheroidized high-energy milled W-Ta pre-alloyed powders.The mixing ratio was chosen depending on solid solution hardening theory in order to improve workability/processability of tungsten alloy in SLM process.The powders were characterized to figure out changes in phase composition and morphology after plasma spheroidization process.The plasma alloying densification and spheroidization procedure certainly improved the performance of tungsten alloy powders during SLM process.Evaporation phenomenon happened during process(i) caused squander of feedstock materials and the evaporation phenomenon cannot be exorcised by optimizing parameters of plasma spheroidization system.(i) and(ii) powders are selective laser melted to illuminate which method suit for preparation for SLM process.