High-strength and corrosion-resistant magnesium alloy material and method for fabricating same

Abstract

A high strength and corrosion-resistant magnesium alloy material, comprising 0.01-1.2 wt % of Ge and 0.01-1.2 wt % of Zn. A high strength and corrosion-resistant magnesium alloy material, comprising the following chemical elements in percentage by weight: Ge: 0.01-1.2%; Zn: 0.01-1.2%; at least one of Mn, Ca, Zr, Sr, and Gd, with a total weight percentage of ≤3%, wherein the percentage by weight of a single element is ≤0.8%; and the balance of Mg and other inevitable impurities. A method for fabricating the above mentioned high strength and corrosion-resistant magnesium alloy material, comprising the steps of: smelting, solid solution heat treatment, and extrusion, wherein in the extrusion step, the extrusion temperature is 180-350° C., the extrusion rate is 0.1-10 mm/s, and the extrusion ratio is 10:1-30:1.

1 . A high strength and corrosion-resistant magnesium alloy material, comprising 0.01-1.2 wt % of Ge and 0.01-1.2 wt % of Zn. 
     
     
         2 . The high strength and corrosion-resistant magnesium alloy material of  claim 1 , wherein the magnesium alloy material has a microstructure including an α-Mg phase and a column-shaped Mg 2 Ge intermetallic compound phase. 
     
     
         3 . The high strength and corrosion-resistant magnesium alloy material of  claim 1 , wherein the magnesium alloy material has a yield strength of higher than 260 MPa, and a corrosion weight loss of less than 0.8 mg/(cm 2  day). 
     
     
         4 . A high strength and corrosion-resistant magnesium alloy material, comprising the following chemical elements in percentage by weight:
 Ge: 0.01˜1.2%;   Zn: 0.01˜1.2%;   at least one of Mn, Ca, Zr, Sr, and Gd with a total weight percentage of ≤3%, wherein the percentage by weight of a single element is ≤0.8%; and   the balance of Mg and other inevitable impurities.   
     
     
         5 . The high strength and corrosion-resistant magnesium alloy material of  claim 4 , further comprising at least one of Al, Cu, Si and Fe in a total weight percentage of ≤2%, wherein the percentage by weight of a single element is ≤0.5%. 
     
     
         6 . The high strength and corrosion-resistant magnesium alloy material of  claim 4 , wherein the total amount of the inevitable impurities is less than 100 ppm. 
     
     
         7 . The high strength and corrosion-resistant magnesium alloy material of  claim 4 , wherein the magnesium alloy material has a microstructure including an α-Mg phase and a column-shaped Mg 2 Ge intermetallic compound phase. 
     
     
         8 . The high strength and corrosion-resistant magnesium alloy material of  claim 4 , wherein the magnesium alloy material has a yield strength of higher than 260 MPa, and a corrosion weight loss of less than 0.8 mg/(cm 2  day). 
     
     
         9 . A method for fabricating the high strength and corrosion-resistant magnesium alloy material of  claim 1 , comprising the steps of: smelting, solid solution heat treatment and extrusion, wherein in the extrusion step, the extrusion temperature is 180-350° C., the extrusion rate is 0.1-10 mm/s, and the extrusion ratio is 10:1-30:1. 
     
     
         10 . The method for fabricating the high strength and corrosion-resistant magnesium alloy material of  claim 9 , wherein in the solid solution heat treatment step, the solid solution heat treatment temperature is 350-450° C., and the treatment time is 10-24 h. 
     
     
         11 . A method for fabricating the high strength and corrosion-resistant magnesium alloy material of  claim 4 , comprising the steps of: smelting, solid solution heat treatment and extrusion, wherein in the extrusion step, the extrusion temperature is 180-350° C., the extrusion rate is 0.1-10 mm/s, and the extrusion ratio is 10:1-30:1. 
     
     
         12 . The method for fabricating the high strength and corrosion-resistant magnesium alloy material of  claim 11 , wherein in the solid solution heat treatment step, the solid solution heat treatment temperature is 350-450° C., and the treatment time is 10-24 h.