A kind of high elongation wrought magnesium alloy and preparation method thereof

A wrought magnesium alloy and high elongation technology, applied in the field of metal material processing, can solve the problems of inability to meet the needs of coordinated deformation, poor industrial application prospects, and high production costs, and achieve high elongation, refinement of grains, and reduction of dosage. Effect

Active Publication Date: 2021-01-19
FIVE STAR DOWNHOLE SERVICE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since magnesium alloy has a close-packed hexagonal crystal structure, there are few slip systems on the basal plane at room temperature, which cannot meet the five independent slip system criteria required by the mises theory for coordinated deformation, so deformation is difficult, and the general elongation is lower than 20%. Its plasticity is poorer than body-centered cubic and face-centered cubic metals
In the prior art, high-elongation magnesium alloys are generally obtained through high-alloying, low-temperature deformation or large plastic deformation. Due to the need to use a large amount of expensive other elements to form alloys, or through a more complicated production process, the production High cost, poor prospects for industrial application

Method used

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  • A kind of high elongation wrought magnesium alloy and preparation method thereof
  • A kind of high elongation wrought magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The high-elongation wrought magnesium alloy described in this embodiment is composed of the following elements in mass percentage: Gd2.20%, Zn0.25%, Zr0.30%, Sc0.05%, Ti0.20%, impurity elements are less than 0.10%, and the rest are Mg.

[0032] The preparation method of the high elongation wrought magnesium alloy described in this embodiment, the specific steps are as follows:

[0033] S1. Take pure magnesium ingots, pure zinc ingots, Mg-Gd master alloys, Mg-Zr master alloys, Mg-Sc master alloys, and Zn-Ti master alloys according to the selected mass percentage;

[0034] S2. Mix the raw materials in step S1, in CO 2 with SF 6Heating at 730°C in a protective atmosphere of a mixed gas with a volume ratio of 200:1, smelting for 60 minutes, stirring for 10 minutes, and refining for 20 minutes, after refining, the temperature was raised to 760°C, and stood for 40 minutes to obtain a melt;

[0035] S3. using the melt in step S2 to cast into a semi-continuous ingot at 700°C...

Embodiment 2

[0039] The high elongation wrought magnesium alloy described in this embodiment is composed of the following elements in mass percentage:

[0040] Gd 2.0%, Zn 0.20%, Zr 0.20%, Sc 0.01%, Ti 0.05%, impurity element is less than 0.10%, and the rest is Mg.

[0041] The preparation method of the high elongation wrought magnesium alloy described in this example is the same as that in Example 1.

Embodiment 3

[0043] The high elongation wrought magnesium alloy described in this embodiment is composed of the following elements in mass percentage:

[0044] Gd 2.20%, Zn 0.28%, Zr 0.50%, Sc 0.10%, Ti 0.20%, impurity elements are less than 0.10%, and the rest is Mg.

[0045] The preparation method of the high elongation wrought magnesium alloy described in this example is the same as that in Example 1.

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Abstract

The invention provides a high-elongation wrought magnesium alloy and a preparation method thereof. The high-elongation wrought magnesium alloy is composed of the following elements of, in percentage by mass, 1.80%-2.50% of Gd, 0.20%-0.30% of Zn, 0.10%-0.60% of Zr, 0.001%-0.20% of Sc, 0.01%-0.20% of Ti, and the balance Mg and impurity elements. The preparation method comprises the following steps of taking raw materials in percentage by mass; mixing the raw materials, smelting and refining to obtain a melt; casting by using the melt to obtain a cast ingot; carrying out homogenization treatmenton the cast ingot, and cutting the cast ingot into a blank; and carrying out thermal processing on the blank to obtain the high-elongation wrought magnesium alloy. According to the high-elongation-rate wrought magnesium alloy and the preparation method thereof, a magnesium alloy structure is refined by adding a small amount of precious elements such as rare earth in the magnesium alloy, the elongation rate of the material is greatly improved under the condition that the material cost is improved in a small range, and the wrought magnesium alloy is suitable for industrial application.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a high-elongation deformed magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy is the lightest metal structure material, which has the characteristics of high specific strength, specific stiffness, electromagnetic shielding and heat dissipation, and is easy to cut, process and recycle, so it has a good application prospect. At present, magnesium alloys have been widely used in the fields of electronics, transportation, aerospace, oil and gas exploration and so on. [0003] According to the forming process, magnesium alloys can be divided into cast magnesium alloys and wrought magnesium alloys, and there is a big gap between the two in terms of structure and performance. Compared with the cast magnesium alloy, the wrought magnesium alloy has a finer and denser structure, so its strength and elongation are a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06B21C23/08
CPCB21C23/08C22C1/03C22C23/06C22F1/06
Inventor 胡毅陈明慧骆晓楠
Owner FIVE STAR DOWNHOLE SERVICE INC
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