Method for improving age hardening effect of magnesium alloy

An age-hardening, magnesium alloy technology, applied in metal rolling, furnace types, furnaces, etc., can solve the problems of complicated severe plastic deformation process and long aging treatment time, which is conducive to large-scale industrial production, shortening peak aging time, The effect of improving time efficiency

Pending Publication Date: 2022-01-11
HARBIN ENG UNIV
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  • Abstract
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Problems solved by technology

[0004] The present invention aims to solve the problems of the existing Mg-RE-Ag-Zn-Zr alloys such as long aging treatment time and complex severe plastic deformation process, and provides a method of regulating the type and distribution of precipitated phases of magnesium alloys through pre-rolling, introducing high Density dislocations, improving the age hardening properties of Mg-RE-Ag-Zn-Zr alloys, and shortening the age hardening time

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  • Method for improving age hardening effect of magnesium alloy
  • Method for improving age hardening effect of magnesium alloy
  • Method for improving age hardening effect of magnesium alloy

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specific Embodiment approach 1

[0021] Specific Embodiment 1: The method for improving the age hardening effect of magnesium alloys in this embodiment is implemented according to the following steps:

[0022] 1. Solid solution treating the Mg-RE-Ag-Zn-Zr as-cast alloy at 500-520°C, and quenching the as-cast alloy in water after the solution treatment to obtain the quenched as-cast alloy;

[0023] 2. Carry out single pass rolling to the as-cast alloy after quenching, obtain the as-cast alloy after rolling;

[0024] 3. Carry out aging treatment to the cast alloy after rolling at a temperature of 180°C-200°C to complete the method for improving the age hardening effect of the magnesium alloy;

[0025] Wherein step 2 controls single-pass reduction: 2-3%, rolling speed: 0.4-0.6m / s, total reduction: 12%-15%.

[0026] In this embodiment, after the as-cast Mg-RE-Ag-Zn-Zr alloy is subjected to solution aging, β′ and β″ precipitates, or β′ and γ″ precipitates are produced in the alloy; after pre-rolling, the Regulat...

specific Embodiment approach 2

[0028] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the mass percent content of each element of the Mg-RE-Ag-Zn-Zr cast alloy in step 1 is: RE: 7%-15%, Ag: 0-1.5%, Zn: 0.5-1%, Zr: 0.4-0.7%, and the balance is Mg.

specific Embodiment approach 3

[0029] Specific embodiment three: the difference between this embodiment and specific embodiment two is that RE elements include Gd, Y, Nd, Ho, Er and Dy, wherein each element accounts for 100% of the mass of Mg-RE-Ag-Zn-Zr cast alloy Min content: Gd: 2-10%, Y: 0-2%, Nd: 0-2%, Ho: 0-2%, Er: 0-1%, Dy: 0-5%.

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Abstract

The invention discloses a method for improving the age hardening effect of a magnesium alloy, belongs to the field of magnesium alloy machining, and aims to solve the problems of long aging treatment time, complex severe plastic deformation process and the like of an existing Mg-RE-Ag-Zn-Zr alloy. The method for improving the age hardening effect of the magnesium alloy comprises the steps that firstly, an Mg-RE-Ag-Zn-Zr cast alloy is subjected to solution treatment at the temperature of 500-520 DEG C, and after solution treatment, the cast alloy is put into water to be quenched; secondly, one-pass rolling is conducted on the quenched cast alloy to obtain a rolled cast alloy; and thirdly, the rolled cast alloy is subjected to aging treatment at the temperature of 180-200 DEG C. According to the method, high-density dislocation is introduced into the alloy through a pre-rolling means, atomic diffusion in the aging process is accelerated, nucleation particles are increased, the density of a precipitated phase is improved, the size and distribution of the precipitated phase are regulated and controlled, and the age hardening effect of the magnesium alloy is improved.

Description

technical field [0001] The invention belongs to the field of magnesium alloy processing, and specifically relates to a method for regulating the type and distribution of magnesium alloy precipitates through pre-cold rolling, improving the age hardening effect of the magnesium alloy, and shortening the age hardening time. Background technique [0002] Magnesium alloys have the advantages of high specific strength, good damping performance, and recyclability. Due to these attractive features, magnesium alloys have considerable application potential in aerospace, aircraft, weaponry, automobiles, electronic products and other fields, and are considered to be "green engineering materials in the 21st century". However, compared with traditional metal materials such as steel and aluminum alloys, ordinary magnesium alloys have problems such as low absolute engineering strength and low hardness, which undoubtedly limit the wide application of magnesium alloys in engineering fields. ...

Claims

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Application Information

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IPC IPC(8): C22F1/06C22C23/06C21D9/00B21B3/00
CPCC22F1/06C22F1/002C22C23/06C21D9/0081B21B3/00
Inventor 张景怀谢金书何玉莹张志巫瑞智
Owner HARBIN ENG UNIV
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