Method for manufacturing extruded magnesium alloy and extruded magnesium alloy manufactured thereby

Abstract

Provided are a method of preparing a magnesium alloy extrudate and a magnesium alloy extrudate prepared thereby. Specifically, the present invention is related to a method of preparing a magnesium alloy extrudate including melting a magnesium alloy raw material (step 1), casting the magnesium alloy raw material melted in step 1 to prepare a magnesium alloy billet (step 2), homogenizing the magnesium alloy billet prepared in step 2 (step 3), applying 3% to 20% of compressive deformation to the homogenized magnesium alloy billet of step 3 (step 4), and extruding the compressive deformed magnesium alloy billet of step 4 (step 5), and a magnesium alloy extrudate prepared thereby.

What is claimed is: 
     
         1 . A method of preparing a magnesium alloy extrudate, the method comprising:
 melting a magnesium alloy raw material;   casting the melted magnesium alloy raw material melted in step 1 in a temperature range of 650° C. to 750° C. to prepare a magnesium alloy billet;   homogenizing the magnesium alloy billet prepared in by heat treating in a temperature range of 400° C. to 550° C. for 0.5 hours to 96 hours and cooling;   applying 3% to 20% of compressive deformation to the homogenized magnesium alloy billet; and   extruding the compressive deformed magnesium alloy billet.   
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . The method as set forth in  claim 1 , wherein the homogenizing is performed after preheating in a temperature range of 250° C. to 350° C. 
     
     
         5 . The method as set forth in  claim 1 , wherein the compressive deformation is performed in a longitudinal direction of the magnesium alloy billet. 
     
     
         6 . The method as set forth in  claim 1 , wherein the compressive deformation is performed in a temperature range of room temperature to 250° C. 
     
     
         7 . The method as set forth in  claim 1 , wherein the extrusion is performed after preheating in a temperature range of 200° C. to 450° C. 
     
     
         8 . The method as set forth in  claim 1 , further comprising performing an aging treatment after the extrusion. 
     
     
         9 . The method as set forth in  claim 8 , wherein the aging treatment is performed in a temperature range of 150° C. to 250° C. for 1 hour to 360 hours. 
     
     
         10 . A magnesium alloy extrudate prepared by the method of  claim 1 . 
     
     
         11 . A part for transportation equipment manufactured using the magnesium alloy extrudate of  claim 8 .