NON-HEAT-TREATED SELF-STRENGTHENING ALUMINUM-SILICON ALLOY AND PREPARATION PROCESS THEREOF

摘要

A preparation process of a non-heat-treated self-strengthening aluminum-silicon alloy comprises the following process steps: firstly adding a pure magnesium ingot and intermediate alloys AL-Si, AL-Mn, AL-Cu and AL-Ti into an aluminum solution having a temperature of 740-760ºC, fusing the above materials, and retaining the alloy solution for 30 minutes at 740ºC; heating the alloy solution to 780ºC, adding mixed rare earths into the alloy solution, removing surface scum after the fusion of the mixed rare earths, stirring the solution for 3-6 minutes, heating the alloy solution to 770-780ºC, and keeping the temperature and allowing the alloy solution to rest for 30 minutes; and cooling the alloy solution to 750ºC, refining for 15 minutes, removing slag and degassing, and finally completing a casting production.