Aluminum alloy product and method of manufacturing the same

Abstract

An aluminum alloy product includes additive elements of 3.0 to 4.2 wt % of silicon, 0.4 to 0.6 wt % of magnesium, 0.2 wt % or less of iron, and 0.5 wt % or less in total of zinc, manganese, nickel, tin and chromium. The additive element substantially excludes copper. The aluminum alloy product is formed by forging a casting of which shape is approximated to a shape of a final product.

1 . An aluminum alloy product formed by forging a casting of which shape is approximated to a shape of a final product comprising additive elements of: 
 3.0 to 4.2 wt % of silicon;    0.4 to 0.6 wt % of magnesium;    0.2 wt % or less of iron; and    0.5 wt % Or less in total of zinc, manganese, nickel, tin and chromium,    wherein the additive element substantially excludes copper.    
     
     
         2 . An aluminum alloy product according to  claim 1 , wherein the aluminum alloy product contains 0.02 wt % or less copper as an unavoidable impurity.  
     
     
         3 . An aluminum alloy product according to  claim 1 , wherein the aluminum alloy product contains 0.01 wt % or less copper as an unavoidable impurity.  
     
     
         4 . An aluminum alloy product according to  claim 1 , wherein the aluminum alloy product is manufactured by hot-forging a casting of which shape is approximated to a shape of a final product with a compression ratio ranged between 30 and 50%.  
     
     
         5 . An aluminum alloy product according to  claim 4 , wherein the aluminum alloy product is cooled down after a solution heat treatment, and is applied with an aging treatment at a temperature ranged between 155 and 165° C. for an aging time ranged between 6 and 8 hours.  
     
     
         6 . An aluminum alloy product according to  claim 1 , wherein the aluminum alloy product is used for a vehicle suspension part,  
     
     
         7 . An aluminum alloy product formed by forging a casting of which shape is approximated to a shape of a final product comprising: 
 3.0 to 4.2 wt % of silicon;    0.4 to 0.6 wt % of magnesium;    0.2 wt % or less of iron; and    0.5 wt % or less in total of zinc, manganese, nickel, tin and chromium,    wherein a balance of the aluminum alloy product is aluminum.    
     
     
         8 . An aluminum alloy product according to  claim 7 , wherein the aluminum alloy product contains 0.02 wt % or less copper as an unavoidable impurity.  
     
     
         9 . An aluminum alloy product according to  claim 7 , wherein the aluminum alloy product contains 0.01 wt % or less copper as an unavoidable impurity.  
     
     
         10 . An aluminum alloy product according to  claim 7 , wherein the aluminum alloy product is manufactured by hot-forging a casting of which shape is approximated to a shape of a final product with a compression ratio ranged between 30 and 50%.  
     
     
         11 . An aluminum alloy product according to  claim 10 , wherein the aluminum alloy product is cooled down after a solution heat treatment, and is applied with an aging treatment at a temperature ranged between 155 and 165° C. for an aging time ranged between 6 and 8 hours.  
     
     
         12 . An aluminum alloy product according to  claim 7 , 
 wherein the aluminum alloy product is used for a vehicle suspension part.    
     
     
         13 . A method of manufacturing an aluminum alloy product comprising the steps of: 
 casting an aluminum alloy material to obtain an aluminum alloy casting of which shape is approximated to a shape of a final product; and    hot-forging the casting with a compression ratio ranged between 30 and 50%, wherein the aluminum alloy material includes additive elements of 3.0 to 4.2 wt % of silicon, 0.4 to 0.6 wt % of magnesium, 0.2 wt % or less of iron, and 0.5 wt % or less in total of zinc, manganese, nickel, tin and chromium, the additive element substantially excludes copper.    
     
     
         14 . A method of manufacturing an aluminum alloy product according to  claim 13  further comprising; 
 cooling down the aluminum alloy product after a solution heat treatment, and    applying an aging treatment to the aluminum alloy product at a temperature ranged between 155 and 165° C. for an aging time ranged between 6 and 8 hours    
     
     
         15 . A method of manufacturing an aluminum alloy product according to  claim 13 , wherein the aluminum alloy product contains 0.02 wt % or less copper as an unavoidable impurity.  
     
     
         16 . A method of manufacturing an aluminum alloy product according to  claim 13 , wherein the aluminum alloy product contains 0.01 wt % or less copper as an unavoidable impurity.  
     
     
         17 . A method of manufacturing an aluminum alloy product according to  claim 13 , wherein the aluminum alloy product is used for a vehicle suspension part.