Shigeo Muramachi and Shigenori Hori
In the previous fundamental experiments, one of the authors studied the phenomenon of the inverse segregation and the results can be summarized as shown in the schematic diagram (Fig. 1.). In the diagram we know the curve consists of two portions A B and C D, and they may be explained respectively by the Super-cooling Theory (AB) and by the Volums Contraction Theory (CD). In this experiments, the authors made a similar investigation of the inverse segregation occuring in industrial Al-Cu (4%) slab ingots, which were prepared by casting in tilting and Züblin moulds. The results show that the mechanism of the inverse segregation which appears in the industrial Al-Cu (4%) slab ingots can be readily explained also by means of diagram (Fig. 1). Furthermore, this diagram suggests that the continuous casting is a very good method for obtaining sound slab ingots.
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