METHOD FOR THE PRODUCTION OF ALLOYS FROM EUTECTIC ALLOY SYSTEMS

摘要

The present invention concerns procedures for producing an alloy from a eutectic alloy system, preferably an Al alloy, in order to form a workpiece such as a billet, ingot or slug for rolling or extrusion purposes by, for example, producing an Al-Mg-Si alloy, which can be precipitation-hardened, which alloy, after having been heated to a temperature above the solubility temperature of phases which can be precipitated, is kept at this temperature until the phases have dissolved and is cooled at a cooling rate which is rapid enough to avoid most of the precipitation of the said phases and slow enough to avoid most of the precipitation of dispersoid particles. At cooling rates within this interval, most coarse phases which have a reductive effect on the processing rate can be avoided and, at the same time, the number of small dispersoid particles which have a reductive effect on the mechanical properties after hardening is limited.