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机构地区:[1]北京矿冶研究总院金属材料研究所,北京100044
出 处:《有色金属》2006年第2期22-25,共4页Nonferrous Metals
摘 要:采用国内新研制的超音速等离子喷涂(S-APS)设备制备WC-12Co涂层,探讨其影响因素。结果表明,喷涂距离和送粉量不变时,粒子平均温度和平均速度随功率增加而增加。功率和送粉量不变时,粒子平均温度和平均速度随喷涂距离的增加而降低。喷涂距离不变时,粒子速度随送粉量的增加呈先增后减的趋势,粒子温度随送粉量的增加而下降,电压对粒子的速度影响较大,粒子速度随电压的增大而增大,电流对粒子温度影响较大,粒子温度随电流的增大而增大。超音速等离子喷涂WC-12Co粉末的最佳工艺参数为:功率56kW(电压140V,电流400A),氩气流量3.8m3/h,氢气流量0.15m3/h,氮气流量0.60m3/h,喷涂距离100mm,送粉量50g/min。The WC-12Co coating is sprayed by supersonic plasma spraying (S-APS) developed recently in China, the influence factors are discussed. The results indicate that when the spray distance and powder feeding speed iS stationary, the average temperature and the average velocity of powder particle are increased with the increase of the power. When the power and powder feeding speed is stationary, the average temperature and the average velocity of powder particle are decreased with the increase of the spray distance. When the spray distance is stationary, the velocity of the powder particle is initially increased and decreased afterwards, the temperature of the particle is descended with the increase of the powder feeding speed. The particle velocity is strongly influenced by the operating voltage, is increased with the voltage increasing. The particle temperature is remarkably influ- enced by the working current, is increased with the current increasing. The optimal parameters of S-APS's for WC-12Co powder spray are as following: power, 56kW(voltage 140V, current 400A) ; Ar flow, 3.8m^3/h; H2 flow, 0.15m^3/h; N2 flow, 0.60m^3/h; spray distance, 100mm; powder feeding speed, 50g/min.
关 键 词:金属材料 WC-12CO涂层 超音速等离子喷涂(S-APS) SPRAY WATCH CCD
分 类 号:TG174.442[金属学及工艺—金属表面处理]
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