High-strength magnesium alloy which can rapidly react with a medium and a production process thereof

Abstract

The present invention provides a high-strength magnesium alloy which can react rapidly with a medium and production processes thereof. In one embodiment, the magnesium alloy comprises gadolinium, yttrium, aluminum, zinc, zirconium, rhenium, silicon, copper, iron, nickel, gallium, indium, beryllium, calcium and magnesium. In another embodiment, the magnesium alloy comprises gadolinium, yttrium, aluminum, zinc, zirconium, rhenium, silicon, copper, iron, nickel, lanthanum, cerium, manganese, gallium, indium, beryllium, calcium and magnesium.

What is claimed is: 
     
         1 . A high-strength magnesium alloy which can rapidly react with a medium, said magnesium alloy comprises gadolinium, yttrium, aluminum, zinc, zirconium, rhenium, silicon, copper, iron, nickel, gallium, indium, beryllium, calcium and magnesium. 
     
     
         2 . The magnesium alloy of  claim 1 , comprising by mass parts 1.0-8.0 parts of gadolinium, 1.0-3.0 parts of yttrium, 0.6-1.5 parts of aluminum, 0.5-6.5 parts of zinc, 0.1-0.5 part of zirconium, 0-2.0 parts of rhenium, a total of 0.05-2.0 parts of silicon, copper, iron, nickel, gallium and indium, 0.1-0.5 part of beryllium and calcium, and 83-97 parts of magnesium. 
     
     
         3 . The magnesium alloy of  claim 2 , comprising by mass parts 3.0-6.0 parts of gadolinium, 1.5-2.5 parts of yttrium, 0.8-1.2 parts of aluminum, 2.0-5.0 parts of zinc, 0.2-0.4 part of zirconium, 1.0-1.5 parts of rhenium, a total of 0.1-1.5 parts of silicon, copper, iron, nickel, gallium and indium, 0.2-0.4 part of beryllium and calcium, and 85-95 parts of magnesium. 
     
     
         4 . The magnesium alloy of  claim 1 , wherein said alloy has increased tensile strength and elongation as compared to those from control examples. 
     
     
         5 . A process for producing a high-strength magnesium alloy of  claim 1  which can rapidly react with a medium, the process comprises the steps of:
 weighing magnesium, aluminum, zinc, nickel, gallium, indium, magnesium-gadolinium intermediate alloy, magnesium-yttrium intermediate alloy, magnesium-zirconium intermediate alloy, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy, 
 preheating magnesium, aluminum, zinc, nickel, magnesium-gadolinium intermediate alloy, magnesium-yttrium intermediate alloy, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy; 
 mixing or co-mixing the above metal materials by smelting, covering treatment and refining treatment to obtain a mixture comprising gadolinium, yttrium, aluminum, zinc, zirconium, rhenium, silicon, copper, iron, nickel, gallium, indium, beryllium, calcium and magnesium; 
 casting an ingot and subjecting the ingot to a thermal insulation treatment; 
 subjecting the ingot to a thermal deformation processing to obtain a forged piece; and 
 subjecting the forged piece to a thermal insulation treatment to obtain the high-strength magnesium alloy which can rapidly react with a medium. 
 
     
     
         6 . The process of  claim 5 , wherein the preheating is carried out at 100-300° C. for 5-10 hours. 
     
     
         7 . The process of  claim 5 , wherein a covering agent is used for the covering treatment, a refining agent 1 or a refining agent 2 is used for the refining treatment, and the casting temperature is 670-750° C., wherein
 the covering agent comprises 35-41% MgCl 2 , 25-29% KCl, 24-28% NaCl, 6-10% CaCl 2 , insoluble matter≤1.5%, MgO≤1.5%, moisture content≤2%; 
 the refining agent 1 comprises 24-30% MgCl 2 , 20-26% KCl, 28-31% BaCl 2 , 13-15% CaF2, 1-7% NaCl, 1-7% CaCl 2 , insoluble matter≤1.5%, MgO≤1.5%, moisture content≤2%; 
 the refining agent 2 comprises 54-56% KCl, 14-16% BaCl 2 , 3-5% CaF 2 , 27-29% CaCl 2 , insoluble matter≤1.5%, MgO≤1.5%, moisture content≤1.5%. 
 
     
     
         8 . The process of  claim 5 , wherein the thermal insulation treatment on the ingot is at 450-540° C. for 8-48 hours; and the thermal deformation processing is carried out at 350-450° C. 
     
     
         9 . The process of  claim 5 , wherein the thermal insulation treatment on the forged piece is at room temperature to 250° C. for 20-600 hours. 
     
     
         10 . The magnesium alloy of  claim 1 , further comprising lanthanum, cerium, and manganese. 
     
     
         11 . The magnesium alloy of  claim 10 , comprising by mass parts 0.01-0.1 parts of gadolinium, 0.6-9 parts of aluminum, 0.5-5 parts of zinc, 0.2-4 parts of lanthanum and cerium, a total of 0.1-6.0 parts of silicon, copper, iron, nickel, manganese, gallium and indium, 0.1-0.5 part of beryllium and calcium, 77-98 parts of magnesium. 
     
     
         12 . The magnesium alloy of  claim 10 , comprising by mass parts 1.0-11.0 parts of gadolinium, 0.6-2 parts of aluminum, 0.5-5 parts of zinc, 0.2-4 parts of lanthanum and cerium, a total of 0.1-6.0 parts of silicon, copper, iron, nickel, manganese, gallium and indium, 0.1-0.5 part of beryllium and calcium, 71-97 parts of magnesium. 
     
     
         13 . The magnesium alloy of  claim 10 , wherein said alloy has increased tensile strength and elongation as compared to those from control examples. 
     
     
         14 . A process for producing a high-strength magnesium alloy of  claim 11  which can rapidly react with a medium, the process comprises the steps of:
 weighing magnesium, aluminum, zinc, nickel, gallium, indium, magnesium-gadolinium intermediate alloy, magnesium-yttrium intermediate alloy, magnesium-zirconium intermediate alloy, magnesium-lanthanum-cerium intermediate alloy, magnesium-manganese intermediate alloy, aluminum-silicon intermediate alloy, and aluminum-iron intermediate alloy; 
 preheating magnesium, aluminum, zinc, nickel, magnesium-gadolinium intermediate alloy, magnesium-yttrium intermediate alloy, aluminum-silicon intermediate alloy, and aluminum-iron intermediate alloy; 
 mixing or co-mixing the above metal materials by smelting, covering treatment and refining treatment to obtain a mixture comprising gadolinium, yttrium, aluminum, zinc, zirconium, rhenium, silicon, copper, iron, nickel, lanthanum, cerium, manganese, gallium, indium, beryllium, calcium and magnesium; 
 casting an ingot and subjecting the ingot to a thermal insulation treatment; 
 subjecting the ingot to a thermal deformation processing to obtain a forged piece; and 
 subjecting the forged piece to a thermal insulation treatment to obtain the high-strength magnesium alloy which can rapidly react with a medium. 
 
     
     
         15 . The process of  claim 14 , wherein the preheating is carried out at 100-300° C. for 5-12 hours. 
     
     
         16 . The process of  claim 14 , wherein a covering agent is used for the covering treatment, a refining agent 1 or a refining agent 2 is used for the refining treatment, and the casting temperature is 670-750° C., wherein
 the covering agent comprises 35-41% MgCl 2 , 25-29% KCl, 24-28% NaCl, 6-10% CaCl 2 , insoluble matter≤1.5%, MgO≤1.5%, moisture content≤2%, 
 the refining agent 1 comprises 24-30% MgCl 2 , 20-26% KCl, 28-31% BaCl 2 , 13-15% CaF 2 , 1-7% NaCl, 1-7% CaCl 2 , insoluble matter≤1.5%, MgO≤1.5%, moisture content≤2%, 
 the refining agent 2 comprises 54-56% KCl, 14-16% BaCl 2 , 3-5% CaF 2 , 27-29% CaCl 2 , insoluble matter≤1.5%, MgO≤1.5%, moisture content≤1.5%. 
 
     
     
         17 . The process of  claim 14 , wherein the thermal insulation treatment on the ingot is at 370-540° C. for 8-48 hours; and the thermal deformation processing is carried out at 330-450° C. 
     
     
         18 . The process of  claim 14 , wherein the thermal insulation treatment on the forged piece is at room temperature to 250° C. for 20-1500 hours. 
     
     
         19 . A method of making a high-strength magnesium alloy which can rapidly react with a medium, said method comprises the step of using a starting material comprising silicon, copper, iron, nickel, gallium and indium. 
     
     
         20 . The method of  claim 19 , wherein said starting material further comprises lanthanum, cerium, and manganese.