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中文摘要：
阐述了热喷涂涂层中残余应力的产生原因,并利用XRD残余应力测试仪、纳米压痕仪、扫描电镜和X射线衍射仪研究了不同厚度和热处理温度下电弧喷涂7Cr13涂层的残余应力、弹性模量及涂层微观结构。结果表明,涂层的残余应力与厚度成正比关系。适当的热处理工艺能够释放涂层的残余拉应力,当热处理的温度在200~300℃之间时,涂层由拉应力转变为压应力,并随着温度的升高,压应力逐渐增大;涂层的弹性模量和热处理温度之间成正比关系。通过对涂层残余应力分布的研究,为喷涂成形较厚涂层提供了一定的理论依据和方法。
英文摘要：
The residual stresses in different thickness and different annealing temperatures of electric arc sprayed 7Cr13 coatings were investigated.The microstructure,elastic modulus and residual stress of the coatings were characterized by SEM,XRD,nano-indentation tester and XRD residual stress tester.The results show that the residual stress in the coating is increasing with increasing of the coating thickness.Annealing treatment can release the residual tensile stress of the coatings.When the annealing temperatur...
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