The 40 Cr/Q345 B bimetal was compressed and simulated by ABAQUS finite element software under different deformation temperature

strain rate and deformation. The changing law of equivalent strain

residual stress and temperature distributions in bimetal interface were analyzed

and the effects of deformation parameters on the composited interface were explored. The results indicate that the degree of interface recovery and recrystallization are increased at a higher temperature

which is beneficial to interface bonding

and the degree of interface bonding is enhanced with the deformation strain increasing. As the rate increases

the composited time is prolonged and interface reaction is sufficient

further strengthening the degree of interface bonding. By means of orthogonal tests

the optimum temperature of 1 150 ℃

strain rate of 0.1 s

-1

and strain of 65% are provided. The experimental results reveal that the element diffusion in bimetal interface is sufficient with a thickness of 22 μm

achieving desirable metallurgical bonding.