| 简介 |
PROBLEM TO BE SOLVED : To provide a magnesium alloy having improved material strength and a method for manufacturing a magnesium alloy member having improved material strength.
SOLUTION : The magnesium alloy is a magnesium alloy containing Mg, Zn and Y and contains at least a granular intermetallic compound Mg3Y2Zn3 phase 3 and an Mg12ZnY phase 2 showing a long period structure, and further, the intermetallic compound Mg3Y2Zn3 phase 3 has a particle size ranging from 40 to 2, 500 nm. The method comprises : a step of obtaining a casting by casting a magnesium alloy containing Mg, Zn and a rare earth element; a step of obtaining an extruded material by heating the casting to a temperature ranging from 350 to 500°C and applying extrusion at an extruding ratio ranging from 1.5 to 12; and a step of obtaining a forging by heating the extruded material to a temperature ranging from 350 to 500°C and carrying out forging. The rare earth element is at least one element selected from the group consisting of Y, Dy, Ho, Er, Gd, Tb and Tm.
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