| 摘要 |
A magnesium alloy sheet processing method wherein a magnesium alloy sheet is rolled at a speed of 180 m/min or more. Particularly, a magnesium alloy sheet processing method, wherein the magnesium alloy sheet is rolled at a speed of 450 m/min or more. A magnesium alloy sheet processing method, wherein a rolling tool which is not heated is used. A magnesium alloy sheet processing method, wherein the temperature of the magnesium alloy sheet immediately before the rolling is in the range of 0° C. to 400° C. A magnesium alloy sheet, wherein the sheet has an average crystal grain of 4 mum or less, and does not internally include any unbonded interface in parallel with a direction of rolling. A magnesium alloy sheet, wherein the sheet has an average grain size of 4 mum or less, and has an internal grain boundary formed by a clean grain boundary.
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