等离子喷涂涂层粒子冷凝过程应力分析
Analysis on Stress Filed of Plasma Spraying Particle During Solidification
马再敏, 姚 进
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作者单位：(四川大学 制造科学与工程学院, 四川 成都 610065)
中文关键字：等离子喷涂； 熔滴； 扁平粒子； 预热温度； 温度场； 残余应力
英文关键字：plasma spraying; melt droplet; compressed particle; preheating temperature; temperature field; residual stress
中文摘要：等离子热喷涂过程中，金属熔滴以一定的速度在基体表面沉积后，发生变形的同时与基体有热交换作用，最终凝固成圆片状固体颗粒；建立扁平粒子的几何模型，利用有限元软件分析了扁平粒子与基体的热交换过程中的温度场变化；接着再建立扁平粒子的ANSYS模型，采用间接耦合的方法，将分析得到的温度场作为载荷加载到模型，解得扁平粒子中的应力分布结果；最后根据扁平粒子中的应力分布，分析了其应力的变化情况，并讨论了基体预热温度对应力的影响。
英文摘要：The metal droplet was deposited on the surface of substrate in a certain speed during plasma spraying. The thermal deformation and heat exchange with the substrate occurs at the same time, eventually it is solidified into solid particles of a round sheet, flat particle's geometric model is created and temperature changing is analyzed during flat particle exchanging heat with the substrate using finite element software; then flat particle ANSYS model is created and the temperature field by analyzing is loaded into the model as the loads using indirect coupling method, the stress distribution results in the flat particle is resolved; finally, according to the stress distribution of the flat particles, the stress changing is analyzed and the impact of substrate's preheating temperature on the stress is discussed.