Abstract：W and CLAM steel with Ti-Cu mixed powder interlayer was diffusion bonded successfully at 30MPa, 1h and 800~950℃. The appearance of W/Ti-Cu/CLAM steel joints were good. Ti2Cu or TiCu4 intermetallic compounds were found in the Ti-Cu mixed powder interlayer. The hardness of interlayer/CLAM steel interface is much higher than that of the base metal due to the formation of TiC, this brittle phase of TiC also results in the softened of steel. With the rising of joining temperature, the shear strength of the joint increased firstly and then decreased, and reached the maximum value of 274MPa at 850℃. All the specimens in shear test fractured at the interface of W/interlayer near the W substrate.
2021, Vol. 28 