MAGNESIUM ALLOY COIL MATERIAL AND PRODUCTION METHOD OF MAGNESIUM ALLOY COIL MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide magnesium alloy coil material capable of forming a plastic working member excellent in morphological stability, and a production method of the magnesium alloy coil material.SOLUTION: Magnesium alloy coil material is formed by spirally winding plate material composed of magnesium alloy. Over the entire length of the plate material, variation in residual stress is within 20 MPa. A production method of the magnesium alloy coil material comprises the steps of: preparing material coil formed by spirally winding material plate which is composed of magnesium alloy and has been subjected to rolling; unwinding the material coil, traveling the material plate, and continuously performing heat treatment at 150°C or more and 300°C or less in a state where tensile stress of more than 5 MPa and 25 MPa or less is applied to the material plate; and spirally winding the plate material which is composed of magnesium alloy and has been subjected to the heat treatment.