Preparation method of AZ31 magnesium alloy with high strength and ductility

• Main Authors: ZHU YIKUN, ZHAO FENG, LIU JIE, FU HUA, YU YAPING, XIA PING, XIE JINHONG
• Format: Patent
• Language: Chinese; English
• Published: 17.12.2021
• Subjects: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a preparation method of an AZ31 magnesium alloy with high strength and ductility, and belongs to the technical field of magnesium alloys. According to the preparation method of the AZ31 magnesium alloy with the high strength and ductility, the inner wall of a variable cross-section dynamic extrusion die is coated with a lubricant, the surface of a commercially available AZ31 magnesium alloy is coated with a lubricant, and then the AZ31 magnesium alloy is placed in the variable cross-section dynamic extrusion die; the AZ31 magnesium alloy is dynamically extruded out of the variable cross-section dynamic extrusion die through a light gas gun, so that the AZ31 magnesium alloy is subjected to high-strain-rate plastic deformation, and the AZ31 magnesium alloy containing deformation twin crystals is obtained; and the AZ31 magnesium alloy containing the deformation twin crystals is subjected to annealing treatment for 1-2 h at the temperature of 323-423 K, and the AZ31 magnesium alloy with t