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Strong-plasticity magnesium alloy and preparation method thereof

A magnesium alloy and plasticity technology, applied in the field of strong plasticity magnesium alloy and its preparation, can solve the problems of plasticity decline, unsatisfactory strength, and inability to further strengthen, and achieve the effect of excellent strong plasticity and delaying the sharp decline of plasticity

Inactive Publication Date: 2020-12-08
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these processes can improve the strength and plasticity of the material to a certain extent, when the grain size of the material is less than 1 μm, the plasticity will drop sharply so that it cannot be further strengthened, resulting in an unsatisfactory final strength.

Method used

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  • Strong-plasticity magnesium alloy and preparation method thereof
  • Strong-plasticity magnesium alloy and preparation method thereof
  • Strong-plasticity magnesium alloy and preparation method thereof

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Experimental program
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preparation example Construction

[0029] The invention provides a method for preparing a strong plastic magnesium alloy, comprising the following steps:

[0030] (1) Rolling the solid solution magnesium alloy to obtain a rolled magnesium alloy;

[0031] (2) Ultrasonic surface rolling processing is performed on the rolled magnesium alloy obtained in the step (1) to obtain a strong plastic magnesium alloy.

[0032] The preparation method of the strong plastic magnesium alloy provided by the invention is suitable for deformed magnesium alloy, preferably AZ31 magnesium alloy or ZK60 magnesium alloy.

[0033] In the invention, the solid solution magnesium alloy is rolled to obtain the rolled magnesium alloy. In the present invention, there is no special limitation on the source of the solid solution magnesium alloy, and the magnesium alloy obtained by solution treatment well known to those skilled in the art can be used. In the present invention, the rolling is preferably cooling hot rolling; the rolling temperat...

Embodiment 1

[0043] (1) The ZK60 magnesium alloy is processed into a size of Bar, and put the bar sample into the RX3 series medium temperature furnace for solid solution treatment, the solid solution parameter is 400 ° C × 24h, after the heating is completed, the sample is taken out and water quenched to obtain a solid solution magnesium alloy;

[0044] (2) The solid solution magnesium alloy is carried out cooling rolling and heat preservation treatment on a three-phase asynchronous rolling mill, and the specific rolling process and heat preservation parameters are as shown in table 1; after each heat preservation is completed, the bar is polished with a grinder On the surface, remove the barbs left after the material is rolled, and when the last grinding is completed, the rolled magnesium alloy is obtained;

[0045]Table 1 Rolling process and heat preservation parameters

[0046]

[0047] (3) Put the rolled magnesium alloy into a medium-temperature furnace for annealing treatment, t...

Embodiment 2

[0055] (1) The AZ31 magnesium alloy is processed into a size of Bar, and put the bar-shaped sample into the RX3 series medium temperature furnace for solution treatment, the solution parameter is 400 ° C / 24h, after the heating is completed, the sample is taken out and water-quenched to obtain a solid-solution magnesium alloy;

[0056] (2) The solid solution magnesium alloy is carried out cooling rolling and heat preservation treatment on a three-phase asynchronous rolling mill, and the specific rolling process and heat preservation parameters are as shown in table 2; after each heat preservation is completed, the bar is polished with a grinder On the surface, remove the barbs left after the material is rolled, and when the last grinding is completed, the rolled magnesium alloy is obtained;

[0057] Table 2 Rolling process and heat preservation parameters

[0058]

[0059]

[0060] (3) Put the rolled magnesium alloy into a medium-temperature furnace for annealing trea...

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Abstract

The invention provides a preparation method of a strong-plasticity magnesium alloy. The method comprises the following steps of rolling a solid solution magnesium alloy to obtain a rolled magnesium alloy; and carrying out ultrasonic surface rolling processing on the rolled magnesium alloy to obtain the strong-plasticity magnesium alloy. According to the method, material grains are refined by rolling the solid solution magnesium alloy, so that the magnesium alloy reaches a good state in the mechanical property, then the rolled magnesium alloy is further subjected to surface modification throughultrasonic surface rolling processing (USRP), and a gradient nanostructure is prepared in the alloy; and rapid reduction of plasticity of the material when the strength is improved is delayed, so that the magnesium alloy has excellent strength and plasticity. Experimental results show that the product of strength and elongation of the prepared ZK60 magnesium alloy is increased from 4106.7 MPa.% to 5313.2 MPa.%; and the product of strength and elongation of the prepared AZ31 magnesium alloy is increased to 1854 MPa.% from 1408 MPa.%.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a strong plastic magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloys are favored by industries such as automobile manufacturing and aircraft manufacturing due to their small weight and high specific strength, but their low strength and low plasticity largely limit the application and development of magnesium alloys. [0003] At present, the improvement of the strong plasticity of magnesium alloys is mainly to refine the grains through single plastic deformation, and use the principle of fine grain strengthening to improve the mechanical properties of magnesium alloys, such as equal radial extrusion, differential rolling, high Strain rate hot rolling or heat treatment can improve the strength of magnesium alloys through precipitation strengthening. Although these processes can improve the strength and plas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/06
CPCC22F1/06
Inventor 梁益龙徐玉友彭贵贵李伟
Owner GUIZHOU UNIV
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