回转体零件热喷涂涂层的结合强度

回转体失效零件利用热喷涂技术修复之后需要对其涂层抗拉结合强度进行测量。参考平面热喷涂涂层结合强度测量方法,提出了一种回转体零件涂层抗拉结合强度测量方法,并对该方法进行了理论分析,给出了具体操作要点和步骤。分析了回转体零件涂层结合强度与平面涂层结合强度测量结果之间产生差异的原因,并进行了试验验证。实际测量了相同工艺下基体半径为40mm的FeAlCrBSiNb回转体涂层和平面涂层的结合强度,测量结果分别为48.3MPa和51MPa,两者相差5.3%。结果表明,在试样基体半径尽可能大或涂层实际面积与投影面积相差尽可能小的条件下,利用该方法可以测得较为准确的回转体零件涂层结合强度。

Bond Strength of Revolution Body Thermal Spray Coating

The coating bond strength of repaired revolution body parts need to be measured after thermal spraying. Based on the method of measuring plane coating bond strength, this paper proposed a method to measure the bond strength of revolution body coating. The key operation steps and detailed process are described. The differences between the revolution body coating and plane coating are also analyzed. According to the method, the bond strength of FeAlCrBSiNb revolution body coating with a radial matrix of 40 mm is measured. Compared with the same coating in plane shape, the measured bond strength of FeAlCrBSiNb revolution body coating is slightly small, 48.3 MPa for revolution body and 51 MPa for plane shape, coinciding with that of theoretical analysis. Results show that when the radius of the matrix is as large as possible or the difference between the actual area and the projected area of the coating is as small as possible, this method can accurately measure the bond strength of revolution body parts coating.