Magnesium alloy and method for making the same

Abstract

A magnesium alloy includes 8.7 to 11.8 wt % aluminum, 0.63 to 1.93 wt % zinc, 0.1 to 0.5 wt % manganese, 0.5 to 1.5 wt % rare earth elements, and a remainder of said magnesium alloy being composed of magnesium and unavoidable impurities.

1 . A magnesium alloy containing: 8.7 to 11.8 wt % aluminum, 0.63 to 1.93 wt % zinc, 0.1 to 0.5 wt % manganese, 0.5 to 1.5 wt % rare earth elements, and the rest being magnesium and unavoidable impurities. 
     
     
         2 . Amagnesium alloy containing: 8.8 to 10.8 wt % aluminum, 0.63 to 1.02 wt % zinc, 0.1 to 0.5 wt % manganese, 0.51 to 1.23 wt % rare earth elements, and the rest being magnesium and unavoidable impurities. 
     
     
         3 . A method for making a magnesium alloy, comprising:
 (1) melting raw materials including aluminum, zinc, manganese, rare earth elements, magnesium, to form a molten magnesium alloy containing: 8.7 to 11.8 wt % Al, 0.63 to 1.93 wt % Zn, 0.1 to 0.5 wt % Mn, 0.5 to 1.5 wt % RE, and the rest being magnesium and unavoidable impurities original alloy materials;   (2) casting the molten magnesium alloy to form a magnesium alloy component;   (3) reheating the magnesium alloy component to a temperature in the range of about 330 to about 420 Celsius degrees by a heating time in the range of about 30 to about 180 minutes;   (4) holding the magnesium alloy component for 0 to 60 minutes at the temperature in the range of about 330 to about 420 Celsius degrees; and   (5) cooling the magnesium alloy component to a room temperature.   
     
     
         4 . The method of  claim 3 , wherein in the step (2), the molten magnesium alloy is cast by a casting method selected from the group consisting of die-casting, thixo casting, sand casting, permanent and semi-permanent mold casting, plaster-mold casting, and investment casting. 
     
     
         5 . The method of  claim 3 , wherein in the step (3), the temperature is in the range of about 350 to about 400 Celsius degrees. 
     
     
         6 . The method of  claim 3 , wherein in the step (3), the heating time is in the range of about 60 to about 120 minutes. 
     
     
         7 . The method of  claim 3 , wherein in the step (4), the magnesium alloy component is held for 0 to 30 minutes at the temperature in the range of about 330 to about 420 Celsius degrees.