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Method for rolling large-sized fine grain magnesium alloy plate

A magnesium alloy, large-scale technology, applied in the direction of metal rolling, metal rolling, rolling mill control devices, etc., can solve the problems of poor plastic deformation ability, poor comprehensive performance, and easy brittle cracking

Inactive Publication Date: 2012-12-12
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the magnesium alloy products on the market are mainly die-casting products, and there are few deformed magnesium alloy products, which are opposite to other commonly used metals in market share, while the comprehensive performance of die-casting products is worse than that of deformed magnesium alloys
One of the bottlenecks restricting the development and application of wrought magnesium alloys is poor plastic deformation ability at room temperature and easy brittle fracture.
Studies have shown that when the magnesium alloy grains are refined to less than 8 μm, the brittle-ductile transition will occur at room temperature, but the usually rolled magnesium alloy sheet has large grains, which is difficult to meet this requirement

Method used

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  • Method for rolling large-sized fine grain magnesium alloy plate
  • Method for rolling large-sized fine grain magnesium alloy plate
  • Method for rolling large-sized fine grain magnesium alloy plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The sample was prepared from a standard AZ31 magnesium alloy slab, with a grain diameter of about 26.7 μm, such as Figure 5 As shown, the geometric size is 10×30×25 (H×B×L). Firstly, the magnesium alloy slab is heated to 350°C and placed in figure 1 Between the two hammerheads shown, compression deformation occurs along the width direction of the slab, and the width decreases and the thickness increases. Each relative compression rate ε B =△B / B O =15%, true response e=ln(B 0 / B)=0.15. Such as Figure 6 shown.

[0037] In the second step, the magnesium alloy slab 3 after compression deformation is rotated horizontally by 90°, such as figure 2 As shown, rolling is carried out along its width direction, and the thickness of the slab returns to the original thickness after rolling.

[0038] The third step is to compress the slab along the length direction, rotate it horizontally by 90° and then roll it. The compression and rolling methods are the same as in the wi...

Embodiment 2

[0041] The sample was prepared from a standard AZ31 magnesium alloy slab, with a grain diameter of about 26.7 μm, such as Figure 5 As shown, the geometric size is 10×50×40 (H×B×L). Firstly, the magnesium alloy slab is heated to 350°C and placed in such as figure 1 Between the two hammerheads shown, compression deformation occurs along the width direction of the slab, and the width shrinks and the thickness increases. Each relative compression rate ε B =△B / B O =33%, true response e=ln(B 0 / B)=0.4.

[0042]In the second step, the magnesium alloy slab 3 after compression deformation is rotated horizontally by 90°, such as figure 2 As shown, the slab is rolled on a rolling mill along its width direction, and the thickness of the slab returns to its original thickness after rolling.

[0043] The third step is to compress the slab along the length direction, rotate it horizontally by 90° and then roll it. The method of compression and rolling, the amount of deformation is th...

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Abstract

The invention discloses a method for rolling a large-sized fine grain magnesium alloy plate. The method comprises the following steps of: firstly, performing wide-direction compressive deformation on a plate blank on a production line to enable the plate blank to be reduced in width but increased in thickness; then, horizontally rotating the plate blank for 90 degrees; delivering the plate blank into a rolling mill along the wide direction to perform rolling elongation to enable the plate blank to be reduced in thickness and recovered to the original size in width; then, compressing along the long direction of the plate blank; horizontally rotating for 90 degrees; and then performing the rolling elongation. According to the method disclosed by the invention, as the elongation direction and the compression direction are opposite, but dependent variables are equal, the plate blank is unchanged in geometrical shape. The process of compression and rolling is repeated, so that a required dependent variable is obtained by the plate blank; crystalline grains are refined; and finally, the plate with the required specification is formed by rolling.

Description

technical field [0001] The invention belongs to the field of material processing engineering, and in particular relates to a rolling method of a large-scale fine-grained magnesium alloy plate. Background technique [0002] Magnesium alloy has a series of excellent characteristics such as small specific gravity, low elastic modulus, high specific strength and specific stiffness, good electromagnetic shielding performance and easy recycling. It is an ideal material for realizing thin-walled and lightweight products. At present, the magnesium alloy products on the market are mainly die-casting products, and there are very few deformed magnesium alloy products, which are opposite to the market share of other commonly used metals, and the comprehensive performance of die-casting products is worse than that of deformed magnesium alloys. One of the bottlenecks restricting the development and application of wrought magnesium alloys is poor plastic deformation ability at room tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B3/00B21B37/00
Inventor 刘长瑞王快社陈建祥
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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