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《Surface Technology》 2007-01
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Study on Geometry Character of Molten Droplet Atomizing during Titanium-aluminum Twin Wires Supersonic Arc Spraying

LI Ping1,2,QIAO Sheng-ru2,WANG Han-gong1(1.The Second Artillery Engineering Institute,Xian 710025,China;2.Material College of North-western Polytechnic University,Xi'an 710072,China)  
The influence of arc spraying parameters on the droplet size of titanium and aluminum was studied.The outlet velocity and mass flow ratio of gases and molten droplet mass flow ratio were determined firstly for supersonic wires arc spray(SWAS).On the basis of Nukiyama-Tanasawa's model about liquid droplet atomization average diameter,the analytic expressions of the molten droplet mean diameter between spray voltage and current in titanium and aluminum supersonic wires arc spray was derived,the correlation with arc spray parameters(voltage and current) droplet mean diameters were simulated by computer. The results show that the mean diameter of droplet increases with adding of spray current,and decreases with rising of spray voltage,but the extent of mean diameter changing is very finites at the certain gas pressure and spray nozzle structure.The particle size of spray droplet atomized determining by laser granularity analyzer,the relative error between calculation value and measure result is 9.52%.The shape of the majority of particles sprayed is sphericity by scanning electron microscopy observing.
【CateGory Index】: TG174.4
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