| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnesium alloy having excellent plastic workability, and further comprising an Mg<SB>12</SB>ZnY phase showing a long period structure in anα-Mg phase, and to provide a method for producing the same. SOLUTION: The magnesium alloy is obtained by holding a continuously cast rod Ma obtained by continuously feeding a molten metal M obtained by melting Mg, Zn and Y into a mold 3, and cooling the same inside the mold 3 at an atmospheric temperature of 250 to 450°C for 30 min to 24 hr, and heat-treating the same, and includes the Mg<SB>12</SB>ZnY phase 12 indicating a long period structure precipitated in anα-Mg phase 11. In the method for producing the magnesium alloy, the molten metal M obtained by melting Mg, Zn and Y is continuously fed to the mold 3, and is cooled in the mold 3 to obtain a continuously cast bar Ma, and the continuously cast bar Ma is held at 30 min to 24 hr at an atmospheric temperature of 250 to 450°C, and is subjected to heat treatment. The continuously cast bar Ma subjected to the heat treatment is subjected to plastic working, and strain is introduced therein. The magnesium alloy includes Zr together with Zn and Y. COPYRIGHT: (C)2009,JPO&INPIT
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