Preparation method for a high-strength extruded profile of Mg—Zn—Sn—Mn alloy

US11351585B2 · kind B2 · utility

Assignees

• Qilu University of Technology · CN
• ADVANCED MATERIALS INSTITUTE, SHANDONG ACADEMY OF SCIENCES · CN

Inventors

• Jixue Zhou · Jinan, CN
• Yunteng Liu · Jinan, CN
• Dongqing Zhao · Jinan, CN
• Baichang Ma · Jinan, CN
• Meifang Wang · Jinan, CN
• Peiliang LI · Lo Wu, CN
• Cong Liu · Lanzhou, CN
• Shouqiu Tang · Jinan, CN

Key dates

• Filing date: Feb 24, 2020
• Grant date: Jun 7, 2022
• Expiry date: May 27, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22F1/06
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for preparing a high-strength extruded profile of an Mg—Zn—Sn—Mn alloy is composed of a solid solution treatment at two stages to a billet, a high-temperature pre-aging to the billet, a low-temperature rapid extrusion and a low-temperature aging treatment to a profile. The Mg—Zn—Sn—Mn alloy includes the following elements in mass percent: 5.8-6.2% of Zn, 3.0-3.5% of Sn, 0.25-0.45% of Mn, unavoidable impurities of 0.05% or less, and the balance magnesium. The Mg—Zn—Sn—Mn magnesium alloy profile has a fine grain size of about 10-20 μm and a dispersed second phase, so a high strength and a good elongation can be obtained therein, and a tensile strength of 350 MPa or more, a yield strength of 280 MPa or more, and the elongation of 12% or more. In addition, the profile has a high extrusion production efficiency and a high yield, and a low extrusion cost.