Method of manufacturing aluminum alloy

Abstract

The present disclosure relates to a method of manufacturing an aluminum alloy with excellent mechanical properties by controlling a heat treatment step and a cooling step in a process of manufacturing the aluminum alloy. In detail, there is provided a method of manufacturing an aluminum alloy, including: a heating step of heating an aluminum alloy made of an aluminum alloy composite up to 500 to 560° C.; a solution treatment step of maintaining the heated aluminum alloy for 5 to 7 hours; a cooling step of cooling the solution-treated aluminum alloy for 15 seconds to 1 minute; and an aging step of age-hardening the cooled aluminum alloy for 2.5 to 4 hours at 140 to 180° C.According to the method of manufacturing an aluminum alloy of the present disclosure and an aluminum alloy manufactured by the method, elongation is secured by reducing the solution treatment time and strength is increased by remaining heat by relatively increasing the drop speed of a pallet between a solution treatment furnace and a cooling container, the distance between the furnace and the container, and the cooling time, thereby being able to provide an aluminum alloy having excellent mechanical properties.

1 . A method of manufacturing an aluminum alloy, comprising:
 a heating step of heating an aluminum alloy made of an aluminum alloy composite up to 500 to 560° C.;   a solution treatment step of maintaining the heated aluminum alloy for 5 to 7 hours;   a cooling step of cooling the solution-treated aluminum alloy for 15 seconds to 1 minute; and   an aging step of age-hardening the cooled aluminum alloy for 2.5 to 4 hours at 140 to 180° C.   
     
     
         2 . The method of  claim 1 , wherein the aluminum alloy contains Sr. 
     
     
         3 . The method of  claim 1 , wherein the cooling is water cooling or air cooling. 
     
     
         4 . An aluminum alloy made by the method of manufacturing an aluminum alloy of  claim 1 .