Aluminum alloy composition and heat treatment method of the aluminum alloy composition

Abstract

Disclosed herein is an aluminum alloy composition and a method of heat treating the aluminum alloy, to improve process control and strength of the aluminum alloy for a rear safety plate mounted on a truck, etc., complying with safety regulations wherein the aluminum alloy composition includes Silicon (Si) about 0.8 to 1.3% by weight, Iron (Fe) up to about 0.5% by weight, Copper (Cu) about 0.15 to 0.4% by weight, Manganese (Mn) up to about 0.15% by weight, Magnesium (Mg) about 0.8 to 1.2% by weight, Chromium (Cr) up to about 0.25% by weight, Zinc (Zn) up to about 0.2% by weight, Titanium (Ti) up to about 0.1% by weight and the remaining percent by weight of Aluminum (Al) of the entire composition.

1 - 3 . (canceled) 
     
     
         4 . A heat treatment method of an aluminum alloy composition, comprising:
 heat treating the aluminum alloy; and   after heat treating the aluminum alloy, age heat treating the aluminum alloy at about 205° C. to 215° C. for 4 to 5 hours.   
     
     
         5 . The heat treatment method of  claim 4 , wherein the aluminum alloy composition comprises Silicon (Si) about 0.8 to 1.3% by weight, Iron (Fe) up to about 0.5% by weight, Copper (Cu) about 0.15 to 0.4% by weight, Manganese (Mn) up to about 0.15% by weight, Magnesium (Mg) about 0.8 to 1.2% by weight, Chromium (Cr) up to about 0.25% by weight, Zinc (Zn) up to about 0.2% by weight, Titanium (Ti) up to about 0.1% by weight and the remaining percent by weight of Aluminum (Al) of the entire composition. 
     
     
         6 . The heat treatment method of  claim 5 , wherein the aluminum alloy composition further comprises Beryllium (Be) and Zirconium (Zr). 
     
     
         7 . The heat treatment method of  claim 6 , wherein the Beryllium (Be) is about 0.04 to 0.07% by weight and the Zirconium (Zr) is about 0.2 to 0.3% by weight of the entire composition. 
     
     
         8 . The heat treatment method of  claim 4 , further comprising: age heat treating the aluminum alloy at 210° C. for 5 hours. 
     
     
         9 . A heat treatment method of  claim 4 , further comprising: solution heat treating the aluminum alloy at about 520° C. to 560° C. for 1.5 to 2.5 hours. 
     
     
         10 . The heat treatment method of  claim 9 , further comprising: solution heat treating the aluminum alloy at 540° C. for 2 hours. 
     
     
         11 . (canceled)