Producing method of magnesium-base alloy wrought product

Abstract

The present invention provides a producing method of a magnesium-based alloy wrought product capable of producing a plastic processing wrought product made of magnesium-based alloy with excellent productivity. A drawn material made of magnesium-based alloy obtained by drawing processing is subjected to plastic processing into a wrought product at processing temperature of lower than 250° C. Since the alloy structure is finely divided by the drawing processing, plastic workability can be enhanced in the plastic processing even if the processing temperature is lower than 250° C. Examples of the plastic processing are forging processing, swaging processing and bending processing.

1 . A producing method of a magnesium-based alloy wrought product, wherein a drawn material made of magnesium-based alloy obtained by drawing processing is subjected to plastic processing into a wrought product at processing temperature of lower than 250° C.  
   
   
       2 . A producing method of a magnesium-based alloy wrought product, wherein a drawn material made of magnesium-based alloy obtained by drawing processing is subjected to forging processing into a wrought product at processing temperature T° C. that satisfies the following conditions: 
 when reduction in height is r 1 % and processing temperature is T° C.,    T is in a range of 3r 1 +150>T≧3r 1 +10, however    20%≦r 1 <80% and T<250° C.    
   
   
       3 . A producing method of a magnesium-based alloy wrought product wherein a drawn material made of magnesium-based alloy obtained by drawing processing is subjected to swaging processing into a wrought product at processing temperature T° C. that satisfies the following conditions: 
 when cross section reduction ratio is r 2 % and processing temperature is T° C.,    T is in a range of 3r 2 +150>T≧3r 2 −30, however    20%≦r 2 ≦80% and T<250° C.    
   
   
       4 . A producing method of a magnesium-based alloy wrought product wherein a drawn material made of magnesium-based alloy obtained by drawing processing is subjected to bending processing into a wrought product at processing temperature T° C. that satisfies the following conditions: 
 when the thickness of the drawn material when it is to be bent is t mm and bending radius is R mm and processing temperature is T° C.,    T is in a range of    250>T≧250-250R/t when 0.1≦R/t≦1.0,    500-250R/t≧T>0 when 1.0<R/t≦1.9, and    25≧T>0 when 1.9<R/t≦2.0.    
   
   
       5 . The producing method of a magnesium-based alloy wrought product according to  claim 1 , wherein the magnesium-based alloy contains 0.1 to 12% by weight Al.  
   
   
       6 . The producing method of a magnesium-based alloy wrought product according to  claim 5 , wherein the magnesium-based alloy contains at least one of 0.1 to 2.0% by weight Mn, 0.1 to 5.0% by weight Zn and 0.1 to 5.0% by weight Si.  
   
   
       7 . The producing method of a magnesium-based alloy wrought product according to  claim 1 , wherein the magnesium-based alloy contains 0.1 to 10% by weight Zn and 0.1 to 2.0% by weight Zr.  
   
   
       8 . The producing method of a magnesium-based alloy wrought product according to  claim 2 , wherein the magnesium-based alloy contains 0.1 to 12% by weight Al.  
   
   
       9 . The producing method of a magnesium-based alloy wrought product according to  claim 3 , wherein the magnesium-based alloy contains 0.1 to 12% by weight Al.  
   
   
       10 . The producing method of a magnesium-based alloy wrought product according to  claim 4 , wherein the magnesium-based alloy contains 0.1 to 12% by weight Al.  
   
   
       11 . The producing method of a magnesium-based alloy wrought product according to  claim 2 , wherein the magnesium-based alloy contains 0.1 to 10% by weight Zn and 0.1 to 2.0% by weight Zr.  
   
   
       12 . The producing method of a magnesium-based alloy wrought product according to  claim 3 , wherein the magnesium-based alloy contains 0.1 to 10% by weight Zn and 0.1 to 2.0% by weight Zr.  
   
   
       13 . The producing method of a magnesium-based alloy wrought product according to  claim 4 , wherein the magnesium-based alloy contains 0.1 to 10% by weight Zn and 0.1 to 2.0% by weight Zr.