Proceedings of the 33rd International MATADOR Conference

Abstract

The fabrication of the clad strip needs many processes as shown below. The slab of the aluminum alloy is cast by the D.C. (Direct Chill) casting. The aluminium alloy strip is usually made from slab by scrapping, homogenization, hot rollings and cold rollings. The strips are connected after cleaning by hot rolling. Process saving is desired at the production of the clad strip for the energy saving. The twin roll caster can cast strip from molten metal directly. Therefore, the clad strip may be fabricated with low energy by the twin roll caster. If the clad strip is made directly from molten metal, the processes to make the thin strip and the process to connect the strips can be saved. This means that the process and energy can be saved drastically. However, there are few reports about the roll casting of the clad strip [1-3]. The twin roll caster to cast clad strip must be investigate to realize the fabrication of the clad strip from the molten metal directly. The conventional twin roll caster for the aluminum alloy is not suitable for casting of the clad strip, because two kinds of melts can not be poured in to the roll bite without the mixture [4-14]. Therefore, the vertical type twin roll caster was adopted in the present study to prevent the mixture of the melts [15-17]. The vertical type is easy to pour the two kinds of molten metal using the launders from the crucible to the roll bite. The two kinds of molten metal must be prevented from the mixture. This was realized original method.The scriber was used to prevent the mixture of the molten metals. The scriber was only the plate, that was made from the mild steel and very simple. In the previous twin roll caster to cast the clad strip, the scriber has not been used [1-3]. The clad strip with clear interface could be cast by the process of the present study, which was the vertical type twin roll caster equipped with the scriber. The two strips were connected strictly, and two strips were not peeled off by bending. The fundamental characters of the vertical type twin roll caster equipped with the scriber to cast clad strip are shown in this report [20]