The Effect of Cold Reduction Ratio on Properties and Structure of Foil Used for Radiator Fin Stock

The radiator is an important component of the automobile heat exchanger.The performance of the radiator determines the automobile quality.In order to reduce the weight and enhance heat dissipation capability,Aluminum foil used for radiator fin stock needs to be ultrathin,with high strength and sag resistant.In this paper,a cold-reduction process of 0.065 mm Aluminum foil used for fin stock is researched.The research shows that Aluminum foil with the cold reduction ratio of 45% has good mechanical properties for fin stock formability at room temperature.After being brazed,such Aluminum foil gains big-size grains along the rolling direction.The big-size grains enhance the strength along the rolling direction and prevent the grain boundary from sliding,and therefore provide the foil with excellent sag resistance capability.