METHOD OF THERMAL TREATMENT OF ALUMINIUM ALLOYS Russian patent published in 1994 - IPC

FIELD: metallurgy. SUBSTANCE: the method for thermal treatment of aluminium alloys comprises heating to homogenizing temperature, holding and hardening. In order to reduce the duration of the treatment process and to retain mechanical properties, the heating and holding operations are carried out in a medium consisting of a mixture of 40-50% metal oxides, such as Al₂O₃, Cr₂O₃ and Fe₂O₃ and 50-60% aluminium fluoride. The use of the claimed method reduces the treatment time by 4-6 hours to obtain the mechanical properties which are the same as those of alloys treated by the prior art method which is widely employed. EFFECT: improved properties of the alloys. 3 tbl