PROCESS FOR PRODUCING ALUMINUM ALLOY PLATE AND ALUMINUM ALLOY PLATE

摘要

A process for aluminum alloy plate production which has excellent productivity and in which the control of surface state and flatness is easy and plate thickness precision is improved; and an aluminum alloy plate. The following steps are conducted in the following order: a melting step (S1) in which an aluminum alloy containing a given amount of Mn and further containing at least one of Si, Fe, Cu, Mg, Cr, Zn, and Ti in a given amount, the remainder being Al and unavoidable impurities, is melted; a hydrogen gas removal step (S2) in which hydrogen gas is removed from the aluminum alloy melted in the melting step (S1); a filtration step (S3) in which inclusions are removed from the aluminum alloy from which hydrogen gas has been removed; a casting step (S4) in which the aluminum alloy from which inclusions have been removed is cast to produce an ingot; and a slicing step (S6) in which the ingot is sliced into a given thickness.