Process of Preparing Aluminum Alloy

摘要

The present invention provides a process of preparing an aluminum alloy, comprising the following steps: a first step of adding a ZL101 aluminum ingot and covering the melt after complete melting said alloy; a second step of adding one of modifiers Te and Sb and then performing heat preservation; and a third step of adding one or more of rare earth elements La, Ce, Y and Hf and then performing heat preservation. The ZL101 alloy melt after the treatment can be casted into an ingot or a part after refining, and a high-toughness ZL101 Al—Si alloy can be obtained after cooling. By adopting the combined effect of the rare earth elements and the long-acting modifiers, the present invention realizes controllable morphology of α-Al and eutectic Si, and inhibits the formation of α-Al dendrites and the generation of the long strip shape eutectic Si in a solidification process, thus the high-toughness ZL101 Al—Si alloy is prepared.

主权项

1. A process of preparing an aluminum alloy, comprising the following steps:
a first step of adding a ZL101 Al—Si alloy and covering the melt after complete melting said alloy; a second step of adding one of modifiers Te and Sb and then performing heat preservation; and a third step of adding one or more of rare earth elements La, Ce, Y and Hf and then performing heat preservation; in the second step, the adding temperature is in the range of 680° C.-740° C., the total adding amount is 0.1-0.5% of the mass of the melt of the Al—Si alloy and the heat preservation time is 15-60 min; and in the third step, the adding temperature is in the range of 700° C.-730° C., the total adding amount is 0.1-1% of the mass of the melt of the Al—Si alloy and the heat preservation time is 5-15 min.