磁参数法用于评估NiCr基合金热喷涂层结合强度的研究

Study on the Evaluation of Bonding Strength of Thermal Sprayed NiCr-based Alloy coatings by Magnetic Method

本文提出了一种基于饱和磁滞回线特征参数的热喷涂层与基材结合强度的无损测试方法。采用MA-WF-05型磁滞多参数评估系统,对在#45碳钢基材上制备的系列NiCr基合金涂层进行了测试,同时对上述样品采用拉伸试验方法测试了结合强度。并通过多元回归分析方法建立了涂层结合强度的预测方程。结果表明预测值与拉伸试验测试值的平均偏差为3.25%,该方法有望推广应用于其他热喷涂层样品。

In this paper,a non-destructive testing method of bonding strength between thermal spraying coatings and substrate based on the characteristic parameters of saturation hysteresis loop is proposed.A series of NiCrbased alloy coatings on#45 carbon steel substrates were tested by MA-WF-05 hysteresis multi-parameter evaluation system,and the bonding strength of the above samples was tested by tensile test method.The prediction equation of coating bonding strength was established by multiple regression analysis.The results show that the average deviation between the predicted values and the tensile test values is 3.25%.This method is expected to be applied to other samples of thermal spraying coatings.