Brazed joint structure and mechanical propertyof Ti(C, N)and 45 steel

The Cu foil and Ni foil with different thickness were used as the interlayer to ease the residual stress of the joint, and the brazing experiment was conducted in the case of brazing parameters which brazing temkeraure is 20℃ and holding time is 20 mins.The results show that the three-point bending strength increases smoothly when thickness of Cu fool or Ni fool is increased from 100 μm to 300 μm.Because Cu foil can be solved in the brazing process, which abates the chemistry consistency of brazing filler metal and Ti(C, N)based metal ceramic and reduces the cohesion of interface, the increase of the joint strength was confined.When Ni foil was used, the prominent characteristic is the higher interface strength compared to the joint brazed Cu foil, but its effect of easing the residual stress is not good, and stress concentration phenomenon is created easily on the side of Ti(C, N)based metal ceramic next to the brazing seam.