Aluminum alloy, method for manufacturing same, and parts using same

Abstract

Discussed is an aluminum alloy for die casting, the aluminum alloy including a composition of approximately 2.0 to 6.0% by weight of calcium (Ca), approximately 1.0 to 3.0% by weight of manganese (Mn), approximately 0.1 to 1.0% by weight of silicon (Si), approximately 0.1 to 0.5% by weight of iron (Fe), the balance being aluminum (Al), and inevitable impurities. A size of grains of the aluminum alloy is in a range of approximately 10 to 50.

1 . An aluminum alloy for die casting, the aluminum alloy comprising:
 a composition of approximately 2.0 to 6.0% by weight of calcium (Ca), approximately 1.0 to 3.0% by weight of manganese (Mn), approximately 0.1 to 1.0% by weight of silicon (Si), approximately 0.1 to 0.5% by weight of iron (Fe), balance being aluminum (Al), and inevitable impurities,   wherein a size of grains of the aluminum alloy is in a range of approximately 10 to 50 μm.   
     
     
         2 . The aluminum alloy of  claim 1 , wherein the composition further contains approximately 1.0 to 1.5% by weight of zinc (Zn). 
     
     
         3 . The aluminum alloy of  claim 1 , wherein the composition further contains approximately 0.01 to 0.1% by weight of magnesium (Mg). 
     
     
         4 . The aluminum alloy of  claim 1 , wherein a content of the manganese (Mn) is in a range of approximately 0.8 to 1.5% by weight. 
     
     
         5 . The aluminum alloy of  claim 1 , wherein a content of the iron (Fe) is in a range of approximately 0.1 to 0.3% by weight. 
     
     
         6 . The aluminum alloy of  claim 1 , wherein the composition does not contain at least one of Ti, Zr, and Cr. 
     
     
         7 . The aluminum alloy of  claim 1 , wherein Ti, Zr, and Cr are materials used for grain refinement during the die casting. 
     
     
         8 . The aluminum alloy of  claim 1 , wherein a content of the silicon (Si) is in a range of approximately 0.1 to 0.2% by weight. 
     
     
         9 . A part manufactured via the die casting of the aluminum alloy of  claim 1 . 
     
     
         10 . The part of  claim 9 , wherein the part is included in a washing machine or a TV stand. 
     
     
         11 . The part of  claim 9 , wherein the part is at least one of a spider and a hub of a washing machine. 
     
     
         12 . The part of  claim 11 , wherein the aluminum alloy in the spider includes the composition of Al 92 Ca 4.8 Mn 1.0 Zn 1.5 Si 0.2 Fe 0.2 , and has a yield strength of approximately 170 MPa. 
     
     
         13 . The part of  claim 11 , wherein the aluminum alloy in the spider includes the composition of Al 91 Ca 4.8 Mn 1.0 Zn 1.5 Si 0.75 Fe 0.2 , and has a yield strength of approximately 190 MPa. 
     
     
         14 - 15 . (canceled) 
     
     
         16 . A method for producing an aluminum alloy using die casting, the method comprising:
 melting an ingot to obtain a molten alloy;   cleaning the molten alloy;   injecting the molten alloy into a mold;   applying a pressure to push the molten alloy into the mold; and   opening the mold and extruding a product containing the aluminum alloy after the molten alloy is solidified,   wherein the aluminum alloy has a composition of approximately 2.0 to 6.0% by weight of calcium (Ca), approximately 1.0 to 3.0% by weight of manganese (Mn), approximately 0.1 to 1.0% by weight of silicon (Si), approximately 0.1 to 0.5% by weight of iron (Fe), and balance being aluminum (Al), and inevitable impurities.   
     
     
         17 . The method of  claim 16 , wherein the pressure is in a range of approximately 125 to 130 kgf/cm 2 . 
     
     
         18 . The method of  claim 16 , wherein a size of grains of the aluminum alloy is in a range of approximately 10 to 50 μm. 
     
     
         19 . The method of  claim 16 , wherein a content of the silicon (Si) is in a range of approximately 0.1 to 0.2% by weight. 
     
     
         20 . The method of  claim 16 , wherein the composition does not contain at least one of Ti, Zr, and Cr. 
     
     
         21 . The aluminum alloy of  claim 1 , further comprising intermetallic compounds evenly distributed or dispersed across an entire surface in the aluminum alloy and away from grain boundaries of the grains. 
     
     
         22 . The aluminum alloy of  claim 21 , wherein the intermetallic compounds are at least one of Al 6 Mn and Al 13 Fe 4 .