超音速等离子喷涂参数对粒子速度温度的影响  

The Influence of Supersonic Plasma Spray Parameters on Flying Particles Velocity and Temperature

作　　者：陆欢[1] 王海军[1] 郭永明[1] 刘明[1] 傅耀宇 

机构地区：[1]装备再制造技术国防科技重点实验室,北京100072 [2]定远汽车试验场,安徽滁州233000

出　　处：《中国表面工程》2008年第1期19-23,共5页China Surface Engineering

基　　金：国家自然科学基金资助项目(编号:90305023)

摘　　要：采用高效能超音速等离子喷涂系统,选用纯Al2O3粉末,研究了电功率、电流、电压、气体流量、送粉量对飞行粒子速度和温度的影响。研究结果表明:Al2O3粒子的温度、速度随功率的增大分别呈持续上升与先增大后下降的趋势;在相同功率时,电流对粒子速度、温度的影响大于电压的影响;加大主气流量,粒子速度和温度均先增大后减小;增大送粉量,粒子速度先增大后减小,而粒子温度则一直减小。最后结合涂层的形貌、孔隙率、显微硬度,优化出最佳的喷涂参数。Using the high efficiency supersonic plasma spray system and Al2O3 powder, the influence of power, current, voltage, gas flux and powder feeding quantity on flying particles velocity and temperature were studied. The results showed that Al2O3 particles temperature increased continuously with the increase of power, while the velocity increased firstly and then decreased. At the same power, the influence of current on particles temperature and velocity was more obvious than that of voltage. The particles velocity and temperature increased firstly and then decreased with the increase of the Ar flux. The particles velocity also initially increased and then decreased with the increase of the powder feeding quantity, while the particles temperature decreased all along. Based on the micro-morphology, porosity and micro-hardness of coatings, the optimal technical process was obtained.

关 键 词：超音速等离子喷涂 喷涂参数 粒子速度、温度 

分 类 号：TG174.442[金属学及工艺—金属表面处理]