Effect of interlayer material on the spreading performance and microstructure of diffusion brazd IC10 superalloy

The diffusion brazd test of IC10 superalloy was carried out by using Russia solder M4 interlayer powder. The wetting quality of the high-temperature alloy was evaluated by the contact angle of wetting at various temperatures. The result shows that at the temperature of 1250°C, the contact angles of interlayer powder M4 alloy do not exceed 10°, it has high wettability and spreadability over the surface of the IC10 alloy. The structure of the joints has a smooth transition from the base metal to the soldered joint when the interlayer powder M4 was used. In the structure of the joint, the base metal contains a large number of Ɣ '- phases. The microstructure of the weld metal does not have continuous eutectic layers, but includes carbide carboride and other phases when the interlayer powder M4 was used.