Rolling method of magnesium alloy ultra-thin sheet

Abstract

The invention discloses a rolling method of a magnesium alloy ultra-thin sheet. The rolling method of the magnesium alloy ultra-thin sheet is characterized by comprising the following steps: A, clamping two ends of a magnesium alloy sheet to be rolled and making the magnesium alloy sheet generate tension; B, heating the magnesium alloy sheet; C, carrying out first pass rolling on the magnesium alloy sheet by a rolling roll; and D, repeating the step B and the step C, till the magnesium alloy sheet is rolled to reach a preset thickness. With adoption of the rolling method of the magnesium alloy ultra-thin sheet having the steps, on-line heating and rolling are carried out on the magnesium alloy sheet and finally the magnesium alloy sheet is rolled into an ultra-thin sheet of 0.8 mm, and the rolling temperature, rolling speed, percentage pass reduction and applied tension of each pass are all constantly changed. The magnesium alloy ultra-thin sheet has higher mechanical property.

Description

technical field [0001] The invention relates to a method for rolling an ultra-thin magnesium alloy plate. Background technique [0002] Magnesium alloy plate has the characteristics of light weight, good shock absorption, high toughness, good heat dissipation, etc., and it also has functions such as electromagnetic wave shielding. It has been more and more used in the fields of aviation, communication, electronics and automobiles. [0003] Magnesium alloys are traditionally regarded as a metal that is difficult to plastically deform and has poor pressure processing performance. The research progress in the processing technology of deformed magnesium alloys is relatively slow. The main reason is that the plastic deformation ability of deformed magnesium alloys is poor, and it is difficult to fix it. At present, wrought magnesium alloys are mainly produced by plastic processing methods such as extrusion, rolling, forging, stamping, bending, and stretching. Among them, profile...

AI Technical Summary

Problems solved by technology

The rolling temperature needs to be controlled within a certain range. If the temperature is too high, 1. energy will be consumed in the actual industrial production process, resulting in unnecessary waste; 2. secondary recrystallization may occur, leading to grain growth, which will affect the properties of the rolled material ; 3 The surface oxidation of the plate seriously damages the surface quality; 4 For the rolling of the thin plate, it is prone to softening and fracture

However, if the rolling temperature is too low, 1. the magnesium plate cannot refine the grain through dynamic recrystallization, and there will be a large number of twins in the coarse grain structure; 2. the magnesium alloy plate material is easy to crack, and there is easy uneven deformation inside the material. Anisotropy is generated, which is very unfavorable to the subsequent processing of magnesium plates

[0005] Temperature control is very important for rolling magnesium plates. Magnesium plates rolled by traditional technology need to be annealed in the middle, which affects the rolling efficiency.

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