Effect of Surface Oxidation Treatment Before Rolling on Properties of Cold Rolled Al/Steel Composite Plate

Al/Steel composite plate has broad application prospects. In this paper, Al/Steel composite plates with high bonding strength were prepared by cold rolling through oxidation treatment of steel surface. The results show that the steel side oxidation treatment can effectively improve the bonding strength of Al/Steel composite plates. The shear strength of “wire brush grinding + steel side oxidation”(‘WSO’) and the process without oxidation are 89 MPa and 53 MPa, after annealling. The mechanism analysis shows that the brittle oxide on the steel plate surface forms cracks during rolling. When the fresh metal on the aluminum side is squeezed into the crack on the steel side, it contacts with the fresh metal on the steel side to form a high-strength bond and form an effective mechanical bite.