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Method for preparing magnesium alloy plate through hot-cold alternate rolling

A magnesium alloy, high-performance technology, applied in the field of alloys, can solve the problems of inability to meet industrial production and use, weaken the texture strength of magnesium alloy base surface, and fail to meet performance requirements, etc., to achieve the incompatibility of improving strength and plasticity, Promotes the generation of aging precipitates and improves the strength

Active Publication Date: 2022-01-11
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, excessively high rolling temperature will weaken the basal texture strength of the magnesium alloy, and will also cause the recrystallized grains to grow further during deformation, resulting in recovery softening behavior, thus failing to meet the ideal performance requirements.
The cold rolling process has few slip systems that can be activated at room temperature, and there are many dislocations accumulated in the magnesium alloy, which makes the material undergo strong work hardening during deformation and is not easy to deform, resulting in cracks, which cannot meet the requirements of industrial production and use

Method used

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  • Method for preparing magnesium alloy plate through hot-cold alternate rolling
  • Method for preparing magnesium alloy plate through hot-cold alternate rolling
  • Method for preparing magnesium alloy plate through hot-cold alternate rolling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 (comparative example, one cycle hot and cold rolling):

[0025] Select an ingot with the composition of Mg-10Gd-3Y-1Zn-0.5Zr, cut it into a rolled plate of 10×35×60mm, put it into a heat treatment furnace, keep it at 500°C for 24h, and then take it out for water cooling. Subsequently, hot-rolling is carried out after heat preservation at 420°C for 30 minutes in a muffle furnace, and each pass is down-rolled by 2.5-4%, and the rolling speed is the second gear of the rolling mill. After rolling down 40%, change it to hot rolling at 450°C. After rolling down 56% at this temperature, carry out cold rolling. The rolling reduction is 1%, and the total rolling reduction is 57%. The final rolled product is obtained, wherein each Before the hot rolling of each pass, it was kept in a muffle furnace at 450°C for 25 minutes. The plate is processed into a tensile sample, and then the above-mentioned tensile sample is subjected to a tensile test on a tensile testing mac...

Embodiment 2

[0027] The composition of the cast ingot is Mg-10Gd-3Y-1Zn-0.5Zr, which is cut and processed into a 10×35×60mm rolled plate, then put into a heat treatment furnace, kept at 500°C for 24 hours, and then taken out for water cooling. Subsequently, hot-rolling is carried out after heat preservation at 420°C for 30 minutes in a muffle furnace, and each pass is down-rolled by 2.5-4%, and the rolling speed is the second gear of the rolling mill. After rolling down 40%, it is changed to hot rolling at 450°C. After rolling down 56% at this temperature, cold rolling is carried out with a rolling reduction of 1%, and then hot rolling is carried out at 450°C again. The reduction is 1%, the total reduction is 60%, and the final rolled product is obtained, wherein each pass is kept in a muffle furnace at 450° C. for 25 minutes before hot rolling. The plate is processed into a tensile sample, and then the above-mentioned tensile sample is subjected to a tensile test on a tensile testing mach...

Embodiment 3

[0028] Embodiment 3 (comparative example, one cycle hot and cold rolling):

[0029]Select an ingot with the composition of Mg-10Gd-3Y-1Zn-0.5Zr-0.5Ag, cut it into a rolled plate of 10×35×60mm, put it into a heat treatment furnace, and keep it at 500°C for 24h Remove from water to cool. Subsequently, hot-rolling is carried out after heat preservation at 420°C for 30 minutes in a muffle furnace, and each pass is down-rolled by 2.5-4%, and the rolling speed is the second gear of the rolling mill. After rolling down 40%, change it to hot rolling at 450°C. After rolling down 56% at this temperature, carry out cold rolling. The rolling reduction is 1%, and the total rolling reduction is 57%. The final rolled product is obtained, wherein each Before the hot rolling of each pass, it was kept in a muffle furnace at 450°C for 25 minutes. The plate is processed into a tensile sample, and then the above-mentioned tensile sample is subjected to a tensile test on a tensile testing machine...

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Abstract

The invention discloses a method for preparing a magnesium alloy plate through hot-cold alternate rolling and belongs to the technical field of alloys. The method comprises the following steps that 1) solution treatment is performed; and 2) rolling deformation treatment is performed, specifically, hot-cold alternate rolling deformation treatment is performed on a sample subjected to solution treatment, that is, an initial rolling temperature is 420 DEG C, heat preservation is performed for 30 min before rolling, rolling is performed at 450 DEG C after rolling reduction is 40%, and hot-cold alternate rolling is started after the rolling reduction reaches 56%. According to the method, a rolling speed is 2 mm / s, after the rolling reduction reaches 40%, heat preservation is performed for 25 min at the temperature of 450 DEG C in a muffle boiler before each pass of hot rolling such that an alloy with the performance higher than that of a magnesium alloy plate prepared through a conventional rolling process can be obtained.

Description

Technical field: [0001] The invention relates to a method for efficiently preparing high-performance magnesium alloy plates, which belongs to the technical field of alloys. Background technique: [0002] With the increasingly severe energy and environmental problems, people have more urgent needs for the development and application of new materials. Magnesium alloy, as the lightest metal structural material in practical engineering applications at present, has high specific strength and specific stiffness, good casting performance, good electromagnetic shielding and damping performance, and high recovery rate. It is called "the green engineering material of the 21st century". It has gradually become one of the hot spots of research and development. With the progress of research and development, magnesium alloys have been developed and applied to a certain extent in industrial fields such as aerospace, automobiles and "3C" electronic products. However, it has poor plasticit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22F1/06B21B1/02B21B3/00C21D9/00
CPCC22C23/06C22F1/06B21B1/026B21B3/00C21D9/0081B21B2001/028
Inventor 杜文博许曦于子健杜保田石康刘轲李淑波
Owner BEIJING UNIV OF TECH