Casting of aluminium alloy clad strip using a vertical type tandem twin roll caster

Abstract

A roll caster to cast three layers clad strip was devised. In this process, two set of twin roll casters were set at the vertical tandem position. This vertical type tandem twin roll caster was assembled, and three layers clad strip was tried by this caster. The base strip was cast by the upper caster. The overlay strips were cast by the lower caster. The material of the base strip was AA8079. The material of the overlay strip was AA6022. The fabrication process of the three layers clad strip is as blow. The base strip was cast by the upper caster. This strip was drawn into the lower caster. When the base strip went through the roll-bite of the lower caster, the melt of the overlay strips was poured to the lower caster. Three layers clad strip could be cast by a vertical type tandem twin roll caster of the present study. The clad strip was made directly from the molten metals. From the result of the line analysis, the diffusion area between the base strip and the overlay strips was very narrow. The interfaces between the base strip and the overlay strips were clear and flat. It became clear that base and overlay strips were bonded firmly from the bending test.