METHOD OF MANUFACTURING MAGNESIUM ALLOY SHEET, AND MAGNESIUM ALLOY SHEET

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing an Mg alloy sheet, capable of productively manufacturing an Mg alloy sheet with superior surface properties and formability.SOLUTION: A method of manufacturing an Mg alloy sheet is a method of manufacturing an Mg alloy sheet by reciprocating a material sheet made of Mg alloy and wound in a coil shape and applying rolling of plural passes to the material sheet. The method includes a feeding step of feeding a material sheet 1 wound in a coil shape, a rolling step of applying rolling to the fed-out material sheet by a rolling roll 3, and a winding step of winding the rolled material sheet 1 in a coil shape, and at least the rolling process is applied to the heated material sheet. After the winding process, the wound material sheet 1 is fed again to the rolling roll 3. At least one pass of the plural passes is carried out at high speed in which a running speed of the material sheet 1 is 40 m/min or more. The method includes a cooling step of cooling the material sheet 1 during the high speed running, and a temperature of the material sheet 1 throughout all the passes is lowered to 280°C or less by the cooling process.