Patent ID: 9334554
Filing Date: 2016-05-10
CPC Classification: C22C,C22F

Claim Text:
1. A magnesium alloy structural member produced by press-forming a magnesium alloy sheet, wherein the press-forming is conducted at a temperature in a range from 200° C. to 280° C., a heat treatment or an anti-corrosion treatment is conducted after the press-forming, and the magnesium alloy is in a temperature range of 150° C. to 250° C. for 60 minutes or less, including the heat treatment, the magnesium alloy sheet comprising: a magnesium alloy containing Al and Mn, wherein: when a region from a surface of the alloy sheet to 30% of the thickness of the alloy sheet in a thickness direction of the magnesium alloy sheet is defined as a surface region and when a 200 μm when a 50 μm in the grains of the crystallized phases, the mass ratio Al/Mn of Al to Mn is 2 to 5, the magnesium alloy contains 5% by mass to 12% by mass of Al and 0.1% by mass to 2.0% by mass of Mn, the magnesium alloy contains at least one element selected from the group consisting of Zn, Si, Ca, Sr, Y, Cu, Ag, Ce, Zr, and rare earth elements, excluding Y and Ce, and the magnesium alloy includes precipitates consisting of Mg