等离子喷涂薄壁零件涂层中的残余应力

以等离子喷涂零件为研究对象,提出了薄壁零件与厚壁零件的概念,并建立了一种基于叠加原理的残余应力计算模型.计算结果表明:在涂层中既可能产生拉应力,也可能产生压应力;喷涂零件残余应力极限值位于基体与涂层的结合区域;增层模型和应力叠加方法可有效估算残余应力的松弛;估算值与测量值吻合得较好;热膨胀系数、基体预热温度、涂层厚度对残余应力的影响较大.研究结果对等离子喷涂涂层的设计具有一定的参考价值.

Residual Stresses of Plasma-Spraying Coating of Thin-Walled Part

A concept of thin-walled and thick-walled parts was proposed for plasma-spraying coating parts,and a mathematical model based on superposition principle established to calculate residual stresses.The results showed that both tensile stress and compressive stress may arise in the coating.The limit value of residual stress appears in the combination zone of substrate and coating.The relaxation of residual stress was effectively estimated with layer model and stress superposition method.The experimental result...