Joint interface characteristics of TA1/Q235 clad plates manufactured by accumulative roll-bonding

A manufacturing process bas titanium ed on the accumulative roll-bonding (ARB) technology for TA1/Q235 clad plates was demonstrated. It is found that well-bonded clad plates can be obtained by this process. The bond strength improves as the accumulative deformation and the first pass deformation increase. The surface treatment methods, i.e. rotoblasting and grinding help get a clean, fresh and work-hardening interface, therefore improve the bond strength of TA1/Q235 clad plates. When the rolling temperature is lower than 800℃, the stripped microstructure of Q235 steel can be examined. However, when rolling temperature is higher than 850℃, this kind of stripped microstructure turns into equiaxed grains due to recrystallization. In addition, there are ferrite belts with regular and coarse grains along the joint interface, but the microstructure of TA1 titanium is mainly equiaxed α and Widmannstatten α structures in metallographic analysis. Considering the microstructures of Q235 steel and TA1 titanium and their bonding properties, the ARB temperature should be controlled in the range of 800 to 850℃.