MAGNESIUM ALLOY AND MANUFACTURING METHOD FOR SAME

摘要

Provided is a magnesium alloy which is thick and exhibits excellent press working characteristics, and a production method for the same. A magnesium (Mg) alloy (typically a magnesium alloy plate) having a plate-shaped section having a thickness of at least 1.5mm, wherein, if the region as far as 1/4 of the thickness, in the thickness direction, from the surface of the plate-shaped section is the surface region, and the remaining section is the inner-section region, the ratio (OF/Oc) of the base surface peak ratio (OF) of the surface region to the base surface peak ratio (Oc) (orientation joint of the (002) surface) of the inner-section region satisfies 0.95=OF/Oc=1.05. The plate-shaped section is formed by means of a uniform aggregate structure across the entire region of the thickness direction thereof, and thus is both thick and has excellent press working characteristics, and press-working material exhibiting excellent dimensional accuracy can be obtained by using the alloy as a starting material. The press-working material obtained is also formed by means of a uniform structure. A plate-shaped Mg alloy can be obtained by rolling a twin-roll continuous cast material at least one pass at a rolling reduction of 25% or more, and at a rolling reduction of not more than 10% for each of the remaining passes.