Trial Manufacturing of a Vertical Type Tandem Twin Roll Caster for Casting Clad Strip(<Special Issue>M & P 2009 The 9th Materials and Processing Conference)

The vertical type tandem twin roll caster can make the clad strip by one process. This roll caster is composed of two vertical type twin roll casters. Two vertical type twin roll casters are set at the vertical position. In this study, the casting of the three layers of clad strip was tried by the vertical type tandem twin roll caster. The base strip was cast by the first (upper) caster. The overlay strips were cast by the second (lower) caster. The material of the base strip was AA8079. The material of the overlay strips was AA6022. The roll speed was 30m/min. The melt temperature of the base strip was 700℃. The melt temperature of the overlay strips was 750℃. The three layers clad strip could be cast by the vertical type tandem twin roll caster. The joining condition of the clad strip was investigated by EPMA and bending test. The diffusion area between the strips was very narrow. The interface between the strips was clear and flat. The strips were bonded firmly.