High-strength corrosion-resistant Mg-RE alloy and preparation method thereof

Abstract

The invention discloses a high-strength corrosion-resistant Mg-RE alloy and a preparation method thereof. Relates to the field of non-ferrous metal materials, processing technologies and heat treatment processes thereof, the magnesium alloy comprises, by mass, 7.9-8.2% of Gd, 3.8-3.91% of Y, 0-2.3% of Nd, 0.3-0.4% of Zr and the balance Mg and inevitable impurities, and the method specifically comprises the following steps of homogenization treatment, multi-pass rolling and aging treatment; based on Nd element regulation and control and heat treatment strategies, the strength and corrosion resistance of the magnesium alloy are improved at the same time; the tensile strength of the magnesium alloy is larger than or equal to 450 MPa, and the corrosion rate can reach 0.12 mm / y. According to the magnesium alloy, the two factors limiting wide application of the magnesium alloy, namely low strength and poor corrosion resistance are improved at the same time, and the potential commercial value of the magnesium alloy is improved through the progress.

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