A new method for detecting heteromorphic workpiece brazing layer quality based on thermal probe

Traditional brazing quality inspection methods find it difficult to detect brazing layer defects on heteromorphic workpieces. Thus, a non-destructive testing technology based on a thermal probe is developed in this work. Scanning thermal resistance testing and analysis are carried out for two types of workpiece samples with different structures, and an evaluation calculation method is proposed to effectively characterize the brazing effect of the workpiece. By comparison with standard workpieces, qualified brazing layer products can be selected. In addition, the feasibility of this method is verified by ANSYS thermal simulations. In comparison with the x ray, it also has shown the superiority of this method. Experimental results show that this method can effectively evaluate the brazing layer quality of workpieces with heteromorphic and complex structures, and the reliability of the workpiece is further improved.