US 12,215,409 B2
High-strength and high-corrosion-resistant ternary magnesium alloy and preparation method thereof
Yangxin Li, Shanghai (CN); Xiaoqin Zeng, Shanghai (CN); Qingchun Zhu, Shanghai (CN); and Tao Ying, Shanghai (CN)
Assigned to Shanghai Jiao Tong University, Shanghai (CN)
Appl. No. 17/793,044
Filed by Shanghai Jiao Tong University, Shanghai (CN)
PCT Filed Mar. 15, 2021, PCT No. PCT/CN2021/080828
§ 371(c)(1), (2) Date Jul. 15, 2022,
PCT Pub. No. WO2021/185209, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 202010198047.9 (CN), filed on Mar. 19, 2020.
Prior Publication US 2023/0069275 A1, Mar. 2, 2023
Int. Cl. C22C 1/03 (2006.01); C22C 23/06 (2006.01); C22F 1/00 (2006.01); C22F 1/06 (2006.01)
CPC C22C 1/03 (2013.01) [C22C 23/06 (2013.01); C22F 1/002 (2013.01); C22F 1/06 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A preparation method of a high-strength and high-corrosion-resistant ternary magnesium alloy, the method comprising the following steps:
(1) under a protective atmosphere, preparing a magnesium alloy melt from an Mg—Y master alloy, an aluminum ingot and a magnesium ingot;
(2) under the protective atmosphere, stirring the magnesium alloy melt, holding at 720-740° C. for 20-60 min, then performing refined degassing and deslagging at 730-750° C., holding again at 720-740° C., and performing heat preservation at 720-740° C. for 20-60 min to obtain a magnesium alloy liquid; and
(3) under the protective atmosphere, casting the magnesium alloy liquid into a mold to form an ingot, and finally obtaining the corrosion-resistant ternary magnesium alloy,
wherein the corrosion-resistant ternary magnesium alloy includes the following elements in percentage by weight: 8-12 wt % of Y, 0.6-3 wt % of Al, and the balance of Mg, and
wherein the corrosion-resistant ternary magnesium alloy includes a lath-shaped LPSO phase and Al2Y particles,
wherein the ingot is solution-treated to obtain the corrosion-resistant ternary magnesium alloy,
wherein a temperature of the solution treatment is 500-580° C., a time of the solution treatment is 8-24 h.