利用高效能超音速等离子喷涂(HEPS)、爆炸喷涂(DGS)和高速电弧喷涂(HVAS)三种热喷涂技术制备了不同厚度的Fe-Cr-B-Si和Fe-Cr-B-Si-Mo涂层,利用 X射线应力测定仪测定了涂层表面残余应力,并得出表面残余应力与涂层厚度的关系曲线,进一步采用电解剥层法+X射线应力测定法研究了涂层应力沿厚度方向的分布曲线,并采用纳米压痕仪和扫描电镜等分析了应力与涂层显微特征的对应关系。结果表明:涂层表层的残余应力主要受喷涂材料、喷涂方法和工艺参数等影响,与涂层的显微特性有对应关系,而与涂层本身的厚度没有对应关系。

The Fe-Cr-B-Si and Fe-Cr-B-Si-Mo coatings of various thickness were separately deposited by highefficiency plasma spraying technology(HEPS),detonation gas spray(DGS)and high velocity arc sprayingtechnology(HVAS).Surface residual stress of these coatings was measured by an X-ray stress tester,and therelation curves between residual stress and coating thickness were obtained.Further more,distributing wave forresidual stress along thickness direction was measured by the X-ray stress tester and electro-analysis method.Correlation between the residual stress and microstructure of the remanufacturing coatings was investigated by usingX-Ray diffraction,Nano-tester and SEM.Results demonstrated that surface residual stress of coatings was mainlyinfluenced by sprayed materials,methods and parameters,and had correlation with microscopic characteristics ofcoating and not with coating thickness.