Process capable of obviously improving room-temperature forming property of AZ31 magnesium alloy plate

Abstract

The invention discloses a process capable of obviously improving the room-temperature forming property of an AZ31 magnesium alloy plate. The process comprises the procedure of rolling, shearing and continuous bending deformation, the AZ31 magnesium alloy plate is subjected to hot rolling for deformation through a roller, and the power is provided by utilizing the friction force generated by rolling deformation, so that the plate is cut and is subjected to continuous multi-pass bending through a multi-step mold which has equal rolling channel height and continuous bending channel so as to realize composite deformation; the inner fillet radius r1 and the outer fillet radius R1 of a first corner of the multi-step mold are far smaller than the inner fillet radiuses r2, r3......rn and the outer fillet radiuses R2, R3.....Rn of a second corner, a third corner......an Nth corner, wherein r2=r3=......rn, R2=R3......Rn, usually, r1 is more than or equal to 2mm and is smaller than or equal to 4mm, and r2=r3=......=rn is more than or equal to 8mm. According to the process, the structure of the AZ31 magnesium alloy plate can be further improved, the room-temperature forming property of the AZ31 magnesium alloy plate can be obviously improved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the preparation technology of high-performance magnesium alloy plates. Background technique [0002] As the lightest metal structural material, magnesium alloy is known as "the most promising green engineering material in the 21st century", especially the deformed magnesium alloy sheet can be used as a notebook computer, mobile phone, household Parts such as shells of electrical appliances and automobile skins have huge market demand and application prospects. However, limited by the crystal structure of magnesium alloy itself, its poor room temperature plasticity and formability are still the bottleneck problems that limit its application. From the perspective of the microscopic scale, the root cause is that when the magnesium alloy sheet is conventionally rolled and deformed, the sliding surface turns to the direction perpendicular to the maximum compressive stress under the action of the applied stress, resulting in the for...

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Problems solved by technology

[0005] The present invention aims at the deficiencies of traditional ECAR and multi-pass bending deformation, and pays attention to their advantages, and proposes a process for continuously preparing large-scale high-performance deformed magnesium alloy plates and equipment for realizing the process, by controlling the texture of magnesium alloys , to achieve the purpose of significantly improving the room temperature formability of AZ31 magnesium alloy sheet

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