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Method of preparing high strength magnesium sheet alloy

A magnesium alloy, high-strength technology, applied in the direction of metal rolling, temperature control, metal rolling, etc., can solve the problems of magnesium alloy sheet rolling processing difficulties, low product yield, etc., to improve the coordinated deformation ability of grain boundaries, The effect of high mechanical properties and wide application prospects

Inactive Publication Date: 2008-07-30
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method for high-strength magnesium alloy plates, which solves the problems of difficult rolling of magnesium alloy plates and low product yield, and the magnesium alloy plates prepared by this process have higher strength and Good plasticity and toughness, can be used in the preparation of various high-strength magnesium alloy sheets

Method used

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  • Method of preparing high strength magnesium sheet alloy
  • Method of preparing high strength magnesium sheet alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Manufacturing process of high-strength AZ91 magnesium alloy sheet: under argon protective atmosphere, AZ91 magnesium alloy is melted, atomized and deposited into an ingot in an atomization deposition device. Then use the gas atomization nozzle to slowly refill the atomization chamber with 0.01-0.03MPa oxygen to gradually oxidize the overspray powder. The overspray powder refers to the ultrafine powder produced during the atomization process, with a particle size below 20 microns 1-20 microns), the gas injection rate is 0.005l / min. The structure of the deposited body is fine and uniform, and the grain size is between 10 and 20 μm, such as figure 1 shown. The deposited billet is directly rolled, the temperature of the rolls must be heated to 100-200°C, the rolling temperature of the deposited billet is controlled at 330-360°C, the deformation of the rolling pass is between 10-20%, and the total deformation 80%. The rolled plate is subjected to aging treatment at 200° C...

Embodiment 2

[0021] High-strength Mg-10%Al-1.5%Zn-4%Ca-0.5%Nd (weight percent) magnesium alloy sheet manufacturing process: under argon protective atmosphere, Mg-10%Al-1.5%Zn-4%Ca The -0.5% Nd alloy prefabricated ingot is melted, atomized and deposited into an ingot in the atomization deposition device. Then use the gas atomization nozzle to slowly refill the atomization chamber with 0.01-0.03MPa oxygen to gradually oxidize the overspray powder, and the gas injection rate is 0.001l / min. The structure of the deposited body is fine and uniform, with an average grain size of 20 μm, such as figure 2 shown. The deposited billet is directly rolled, the temperature of the rolls must be heated to 100-200°C, the rolling temperature of the deposited billet is controlled at 300-350°C, the deformation of each rolling pass is between 10-20%, and the total deformation 80%. The rolled plate is subjected to aging treatment at 200° C., and the aging time is 6 hours. The room temperature tensile streng...

Embodiment 3

[0023] High-strength Mg-5%Al-3%Zn-2.5%Ca-2.0%Nd (weight percent) magnesium alloy sheet manufacturing process: under argon protective atmosphere, Mg-5%Al-3%Zn-2.5%Ca The -2.0% Nd alloy prefabricated ingot is melted, atomized and deposited into an ingot in the atomization deposition device. Then use the gas atomization nozzle to slowly refill the atomization chamber with 0.01-0.03MPa oxygen to gradually oxidize the overspray powder, and the gas injection rate is 0.003l / min. The deposited billet is directly rolled, the temperature of the rolls must be heated to 100-200°C, the rolling temperature of the deposited billet is controlled at 280-330°C, the deformation of each rolling pass is between 10-20%, and the total deformation 80%. The rolled plate is subjected to aging treatment at 180° C., and the aging time is 8 hours. The room temperature tensile strength of the plate after rolling is 360MPa, the yield strength is 340MPa, and the elongation is 7%; the room temperature tensi...

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Abstract

The invention relates to technique for processing magnesium alloy, in particular to a method for preparing magnesium alloy planks with high strength and solves the problems that the rolling of the magnesium alloy planks is relatively difficult; the yield of the planks is low, etc. The rolling techniques of spray forming and deposited blank-rolling are used for preparing the high-strength magnesium alloy planks; oxygen with 0.01-0.03MPa is slowly injected into an atomization chamber after the completion of the atomization; over-spray powder of the magnesium alloy is then treated with passivation; then, deposited magnesium alloy ingots are directly and hotly rolled so as to prepare the magnesium alloy crystal grains with small size, even texture and relatively high mechanical property; the mechanical property of the magnesium alloy crystal grains can be further improved by the alloy treatment followed by the alloy rolling. Compared with the traditional preparation technique of the magnesium alloy planks, the technique of the invention has simple process and relatively low temperature of the alloy rolling, and can be applied to preparation of diversified magnesium alloy planks with the high strength.

Description

technical field [0001] The invention relates to a magnesium alloy processing technology, in particular to a preparation method of a high-strength magnesium alloy plate. Background technique [0002] Deformed magnesium alloy materials can be obtained by rolling, extrusion, forging and other pressure processing methods to obtain products such as tubes, rods, shapes, plates, strips, forgings, etc. More than 70% of non-ferrous metal products are plates and strips, so obtaining high-quality wrought magnesium alloy sheets through rolling is the most important direction for developing wrought magnesium alloy materials. According to the main deformation diagram of metal deformation, rolling processing belongs to the deformation mode of two-way extension and one-way compression, so rolling is not conducive to fully exerting the plastic deformation ability of materials. And due to the close-packed hexagonal crystal structure of magnesium, the plastic deformation at room temperature i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/06B23P23/04B22F9/08B22F3/23B22F3/18B22F3/24B21B37/74B21B37/00C21D9/00C21D11/00C22F1/06
Inventor 赵九洲王晓峰何杰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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