| 摘要 |
PROBLEM TO BE SOLVED: To provide a thin plate material and a foil material of a magnesium alloy having an addition amount of solute elements reduced and excellent in strength and attenuation characteristics, the magnesium alloy being suitable for a member of acoustic devices such as a speaker and a headphone.SOLUTION: A magnesium alloy of the present invention is a Mg-X alloy, wherein the additive element X is one or a plurality of kinds among Ag, Al, Li, Sn, and Zn. The content of the X element meets the expression: 0.001≤Xmol%<0.3, and the balance of the chemical composition is magnesium and inevitable impurities. The additive element is uniformly solid-soluble in a Mg host phase without forming a deposit. The average crystal grain size of a magnesium alloy ranges from 10 μm to 500 μm. A magnesium alloy of an average crystal grain size of 50 μm or less is rolled to 1 mm or less at a temperature between 200 and 400°C and a rolling reduction of 10 to 20% per one roll to manufacture a thin plate material and a foil material of the magnesium alloy. |
