ZK60 magnesium alloy and preparation method thereof

Abstract

The invention discloses ZK60 magnesium alloy, characterized by comprising, by mass, 2.5-3% of Al, 0.8-1.2% of Zn, 0.15-0.2% of Mn, 0.06% of Si, 0.03% of Cu, 0.02% of Ni, 0.01% of Fe, and the balance of Mg. A preparation method of the ZK60 magnesium alloy includes the steps of (1) selecting each material according to a mass ratio, preheating the selected materials, mixing pure magnesium, magnesium-silicon intermediate alloy and magnesium-calcium intermediate alloy, heating to allow melting in a protective atmosphere to form a melt at 760-850 DEG C, and holding the temperature to obtain alloy liquid; (2) lowering the temperature of the alloy liquid introducing high-purity argon to carry out refining, holding the temperature, and allowing standing to obtain refined alloy liquid, pouring the refined alloy liquid into a mold, and cooling and condensing to obtain finished magnesium alloy. The finished magnesium alloy is prepared by extruding with a magnesium alloy channel corner hot extrusion mold.

Description

technical field [0001] The invention relates to a magnesium alloy hot extrusion forming technology, in particular to a ZK60 magnesium alloy and an equal-channel corner hot extrusion forming die, which are used in the field of magnesium alloy hot extrusion processing. Background technique [0002] Magnesium is one of the most abundant light metal elements on the earth, with high specific strength and specific stiffness; good thermal conductivity and electrical conductivity; good damping, shock absorption, machinability and electromagnetic shielding performance; low processing cost, Easy to recycle, known as the most promising green engineering material in the 21st century. Magnesium and its alloys are widely used in aerospace and other transportation fields due to their good shock absorption and thermal conductivity. However, because magnesium has a hexagonal close-packed (HCP) crystal structure and less slip systems, compared with other structural materials such as aluminum...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: aiming at the deficiencies in the structure of the existing equal-channel angular extrusion die and the die heating method, the purpose of the present invention is to optimize the die structure, solve the problems existing in the traditional die heating method, and solve the problems caused by the mold heating method. The problem of uneven plastic deformation caused by the structure improves the life and safety performance of the mold and solves the problems existing in the traditional mold heating method

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