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A plasticizing process for magnesium alloy components

A technology for magnesium alloys and components, which is applied in the field of plasticizing technology of magnesium alloy components, can solve the problems of reducing toughness/plasticity, affecting the application range of magnesium alloy components, etc., and achieves the effects of improved strength and plasticity, easy implementation, and simple process operation.

Active Publication Date: 2020-12-29
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, after heat treatment of magnesium alloy components, although the strength of the alloy will be greatly increased, its toughness / plasticity will also be greatly reduced, which will inevitably affect the application range of magnesium alloy components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0019] A plasticizing process for magnesium alloy components (Mg-9.3Al-0.6Zn-0.3Mn alloy components), the steps include: firstly, precision-formed Mg-9.3Al-0.6Zn-0.3Mn alloy components in an atmosphere of 420 ° C Heat preservation for 2 hours for solution treatment, and then heat it in an atmosphere of 130°C for 3 hours, and then place it in a mold at room temperature for cold pressing. The total deformation after cold pressing is 6%. Finally, after the cold pressing is completed, The components are placed in an atmosphere of 170 °C for 20 hours for aging treatment, and after the aging is completed, they are cooled by strong wind. After the completion of the mechanical performance test of the component, the tensile strength of the component is 428MPa, the elongation after fracture is 15%, and the surface roughness grade of the component is IT8.

Embodiment 3

[0021] A plasticizing process for magnesium alloy components (Mg-8.2Al-0.7Zn-0.2Mn alloy components), the steps include: firstly, precision-formed Mg-8.2Al-0.7Zn-0.2Mn alloy components in an atmosphere of 400 ° C Heat preservation for 1.5h for solution treatment, then heat it in an atmosphere of 110°C for 6h, and then place it in a mold at room temperature for cold pressing. The total deformation after cold pressing is 4%, and finally the cold pressing is completed. The final component is placed in an atmosphere at 200°C for 10 hours for aging treatment, and after the aging is completed, it is cooled by strong wind. After the completion, the mechanical performance test of the component was carried out. The tensile strength of the component was measured to be 415MPa, the elongation after fracture was 15.5%, and the surface roughness grade of the component was IT9.

Embodiment 4

[0023] A plasticizing process for a magnesium alloy component, the steps include: first, heat the precisely formed Mg-8.5Gd-4.5Y-1.0Zn-0.6Zr alloy component in an atmosphere of 500 ° C for 1 hour for solid solution treatment, and then place it Cold pressing in a mold at room temperature, the total deformation after cold pressing is controlled to 6%, and then two-stage aging treatment is performed on the components after cold pressing, and the temperature during the first-stage aging treatment is controlled at 110 °C, The time is controlled for 12 hours, the temperature during the secondary aging treatment is controlled at 190°C, the time is controlled for 30 hours, and strong wind cooling is performed after the aging is completed. After the completion, the mechanical performance test of the component was carried out. The tensile strength of the component was measured to be 512MPa, the elongation after fracture was 13%, and the surface roughness was IT8.

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Abstract

The invention provides a plastification process of a magnesium alloy member. The process comprises the steps that in the heat treatment process, twin crystal defects are introduced into the organization of the magnesium alloy member, and the magnesium alloy member is subjected to aging treatment. The twin crystal defects are introduced into the magnesium alloy member through cold pressing, the temperature in the cold pressing process is controlled to be 10-30 DEG C, and the total deformation amount after cold pressing is controlled to be 3-9%. According to the plastification process, by introducing the twin crystal defects in the organization of the magnesium alloy member and conducting aging treatment on the magnesium alloy member, the strength and plasticity of the magnesium alloy memberare synchronously improved, and the problem that the strength of the traditional heat treatment process is improved but the plasticity is lowered is solved. The tensile strength of the treated magnesium alloy member can reach 411-512 MPa, the elongation percentage after fracture can reach 14-17%, the surface roughness can reach the level IT8-IT10, and more possibilities are provided for extendedapplication of the magnesium alloy member. Besides, the process is easy to operate and implement, and suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to a magnesium alloy heat treatment process, in particular to a plasticizing process for magnesium alloy components. Background technique [0002] At present, relatively mature magnesium alloys mainly include Mg-Al, Mg-Zn and Mg-Re series, among which Mg-Al and Mg-Zn series are the most potential magnesium alloy series, which are widely used in rail vehicles, automobiles, Aerospace and weapons and other fields. Mg-Al series alloys are easy to cast, easy to process, high strength, high corrosion resistance, and low cost. They are currently the most widely used magnesium alloy series, and they can obtain excellent properties through solid solution and aging strengthening. Mechanical properties at room temperature. [0003] Magnesium alloy components are mostly obtained by deep processing (such as hot pressing process) on the basis of magnesium alloy profiles. Usually, the elongation rate of magnesium alloy profiles is relatively s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/06C22F1/02C22C23/02
CPCC22C23/02C22F1/02C22F1/06
Inventor 夏祥生陈强舒大禹黄树海林军康凤王艳彬
Owner NO 59 RES INST OF CHINA ORDNANCE IND