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High-strength high-plasticity heat-resistant magnesium alloy component and preparation method thereof

A magnesium alloy and high plastic technology, applied in the field of magnesium alloy components, can solve problems such as poor performance of magnesium alloy components, and achieve the effects of being convenient for large-scale industrial production, less waste, and simple process operation

Active Publication Date: 2022-08-02
中国兵器装备集团西南技术工程研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology is essentially a solution developed for aluminum alloy extrusion materials, which is still an improvement on the material level, and the performance of magnesium alloy components produced by it is still not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-strength, high-plasticity and heat-resistant magnesium alloy component is composed of the following components in terms of mass percentage: Gd: 5.8%, Y: 2.8%, Zn: 0.2%, Zr: 0.5%, and the balance is Mg and non-ferrous metals. Avoid impurities.

[0028] The preparation method of the high-strength, high-plastic, heat-resistant magnesium alloy component (straw hat-shaped component) in this embodiment is carried out according to the following steps:

[0029] Step 1, alloy smelting: add preheated pure Mg and pure Zn into a low carbon steel crucible, and add Mg-Gd and Mg- after the pure Mg and pure Zn are completely melted and the temperature rises to 780 ℃ ~ 800 ℃ After the Y master alloy is completely melted, it is purified by blowing Ar gas for 15 minutes. After standing for 10 minutes, the components before the furnace are sampled. After the components are qualified, the crucible is closed and allowed to stand. When the temperature reaches 670 °C, casting is perfor...

Embodiment 2

[0037] A high-strength, high-plasticity and heat-resistant magnesium alloy component, in terms of mass percentage, is composed of the following components: Gd: 6.3%, Y: 2.8%, Zn: 0.4%, Zr: 0.6%, and the balance is Mg and non-ferrous metals. Avoid impurities.

[0038] The preparation method of the high-strength, high-plastic, heat-resistant magnesium alloy component (straw hat-shaped component) in this embodiment is carried out according to the following steps:

[0039] Step 1, alloy smelting: add preheated pure Mg and pure Zn into a low-carbon steel crucible, and add Mg-Gd and Mg-Y master alloys after pure Mg and pure Zn are completely melted and the temperature rises to 800°C , after complete melting, then blow Ar gas for 30min for purification treatment, and then stand for 10min to sample the components before the furnace. After the components are qualified, close the crucible and let it stand, and set the solution to be kept at 680 ℃, and wait for the temperature to drop to...

Embodiment 3

[0047] A high-strength, high-plastic, heat-resistant magnesium alloy component is composed of the following components in terms of mass percentage: Gd: 6.5%, Y: 3.3%, Zn: 0.4%, Zr: 0.6%, and the balance is Mg.

[0048] The preparation method of the high-strength, high-plastic, heat-resistant magnesium alloy component (straw hat-shaped component) in this embodiment is carried out according to the following steps:

[0049] Step 1, alloy smelting: add preheated pure Mg and pure Zn into a low-carbon steel crucible, and add Mg-Gd and Mg-Y master alloys after pure Mg and pure Zn are completely melted and the temperature rises to 790°C , after complete melting, then blow Ar gas for 20min for purification treatment, and then stand for 10min to sample the components before the furnace. After the components are qualified, close the crucible and let it stand, and set the solution to be kept at 678 ℃, and wait until the temperature drops to the above During the temperature range, casting ...

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Abstract

The invention provides a high-strength high-plasticity heat-resistant magnesium alloy component and a preparation method thereof, the high-strength high-plasticity heat-resistant magnesium alloy component comprises the following components: 5.0-9.0% of Gd, 2.0-6.0% of Y, 0.1-0.5% of Zn, 0.3-1.0% of Zr, and the balance of Mg and inevitable impurities, and the sum of the mass percent of rare earth elements Gd and Y in the component composition is 8-12%; the preparation method comprises the steps of alloy smelting, homogenization treatment, strong plastic deformation, hot forming and warm deformation, specifically, an obtained formed part is heated at the temperature of 200-250 DEG C, heat preservation is conducted for 2 h, then the formed part is put into a mold preheated at the temperature of 200 DEG C, the deformation amount is controlled to be 3-10%, and heat treatment is conducted. The prepared magnesium alloy component is fine in grain, the tensile strength at the room temperature is larger than or equal to 428 MPa, the percentage elongation after fracture is larger than or equal to 12%, the tensile strength at the temperature of 200 DEG C is larger than or equal to 358 MPa, the percentage elongation after fracture is larger than or equal to 13%, the magnesium alloy component can widely replace 2A12 and other medium-strength aluminum alloys, and the application range of the magnesium alloy can be further expanded.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy components, in particular to a high-strength, high-plastic, heat-resistant magnesium alloy component and a preparation method thereof. Background technique [0002] As a magnesium alloy with a close-packed structure, its plasticity is low, especially for rare-earth magnesium alloy components with a strength greater than 400MPa, the plasticity is lower, usually around 5%. Although it has obvious lightweight advantages, its application It is far behind the 400MPa-class deformed aluminum alloy. Therefore, the development of a high-strength and high-plastic magnesium alloy component to replace the widely used 2A12 and other deformed aluminum alloys is of great significance for expanding the application of magnesium alloys. [0003] In view of the shortcomings of conventional wrought magnesium alloys, as early as 2007, Li Jianping of Xi'an University of Technology developed a high-strength hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06B23P15/00
CPCC22C23/06C22C1/03C22F1/06B23P15/00
Inventor 夏祥生黄树海陈强詹红肖寒王艳彬彭菲菲
Owner 中国兵器装备集团西南技术工程研究所
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