High-strength non-combustible magnesium alloy

Abstract

The high-strength non-combustible magnesium alloy is obtained by adding at least one supplementary additive selected from among carbon (C), molybdenum (Mo), niobium (Nb), silicon (Si), tungsten (W), alumina (Al 2 O 3 ), magnesium silicide (Mg 2 Si) and silicon carbide (SiC) to small chip-like blocks of a non-combustible magnesium alloy resulting from adding 0.5 to 5.0% by mass of calcium to a magnesium alloy to produce a crushed product, and subjecting the same to forming, sintering and plastic working. The high-strength non-combustible magnesium alloy exhibits excellent joining ability, and can therefore enhance weldability when used in a filler metal.

1 . A high-strength non-combustible magnesium alloy, obtained by adding at least one supplementary additive selected from among carbon (C), molybdenum (Mo), niobium (Nb), silicon (Si), tungsten (W), alumina (Al 2 O 3 ), magnesium silicide (Mg 2 Si) and silicon carbide (SiC) to a non-combustible magnesium alloy resulting from adding 0.5 to 5.0% by mass of calcium to a magnesium alloy. 
     
     
         2 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein the amount of carbon (C) of the supplementary additive is 0.1 to 0.3% by mass. 
     
     
         3 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein the amount of molybdenum (Mo) of the supplementary additive is 1.0 to 12.0% by mass. 
     
     
         4 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein the amount of niobium (Nb) of the supplementary additive is 0.5 to 5.0% by mass. 
     
     
         5 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein the amount of silicon (Si) of the supplementary additive is 0.5 to 6.0% by mass. 
     
     
         6 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein the amount of tungsten (W) of the supplementary additive is 5.0 to 40.0% by mass. 
     
     
         7 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein the amount of alumina (Al 2 O 3 ) of the supplementary additive is 1.0 to 5.0% by mass. 
     
     
         8 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein the amount of magnesium silicide (Mg 2 Si) of the supplementary additive is 2.0 to 6.0% by mass. 
     
     
         9 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein the amount of silicon carbide (SiC) of the supplementary additive is 0.7 to 20.0% by mass. 
     
     
         10 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein the magnesium alloy is a magnesium alloy comprising 0 to 12.0% by mass of aluminum, 0 to 5.0% by mass of zinc, and not more than 0.5% by mass of manganese. 
     
     
         11 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein the magnesium alloy is one magnesium alloy selected from among AZ31 alloy, AZ61 alloy, AZ80 alloy, AZ91 alloy, AZ92 alloy, AM50 alloy, AM60 alloy and AM100 alloy according to the American Society for Testing and Materials (ASTM). 
     
     
         12 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein the non-combustible magnesium alloy comprises a crushed product obtained from a base material of the non-combustible magnesium alloy. 
     
     
         13 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein the high-strength non-combustible magnesium alloy is an alloy manufactured by adding the supplementary additive, followed by plastic working in which permanent deformation is imparted through application of an external force. 
     
     
         14 . The high-strength non-combustible magnesium alloy according to  claim 12 , wherein the crushed product is cutting chips obtained by cutting, or a powder thereof. 
     
     
         15 . The high-strength non-combustible magnesium alloy according to  claim 13 , wherein the plastic working is one type of working from among extrusion, drawing, roll forging and rolling, or a combination of two or more of the foregoing. 
     
     
         16 . The high-strength non-combustible magnesium alloy according to  claim 1 , wherein an alloy formed by adding the supplementary additive is an alloy that makes up a filler metal. 
     
     
         17 . The high-strength non-combustible magnesium alloy according to  claim 16 , wherein the filler metal is a wire-shaped or rod-shaped welding material.