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High-strength and high-ductility magnesium alloy capable of being dissolved rapidly and preparation method thereof

A high-elongation, high-strength technology, applied in the direction of earthwork drilling, mining fluid, wellbore/well components, etc., can solve the problems of low reaction rate between magnesium alloy and medium, inability to meet industrial applications, and decrease in alloy elongation. Achieve the effect of improving alloy strength, increasing speed and high elongation

Active Publication Date: 2019-08-30
FIVE STAR DOWNHOLE SERVICE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low reaction rate of conventional magnesium alloys with media in a certain temperature range and insensitivity to temperature changes, it cannot meet the needs of industrial applications.
In order to increase the dissolution rate of magnesium alloys, some elements are usually added to the alloy to reduce the continuity of the product magnesium hydroxide and increase the reaction rate. However, the addition of alloying elements will cause solid solution strengthening and second-phase dispersion strengthening of the alloy. The increase of phases will also lead to the decrease of alloy elongation to varying degrees, sacrificing the mechanical strength properties of alloy materials, and the reliability will deteriorate after it is applied in related fields

Method used

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  • High-strength and high-ductility magnesium alloy capable of being dissolved rapidly and preparation method thereof
  • High-strength and high-ductility magnesium alloy capable of being dissolved rapidly and preparation method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0033] The rapidly dissolving high-strength and high-elongation magnesium alloy described in this embodiment is composed of the following elements in mass percentage: Gd 2.5%, Y 1.0%, Al 1.0%, Zn 0.5%, Zr 0.4%, Sc 0.01%, Cu 1.5%, Li 0.25%, Ni 0.25%, Ga 0.25%, In 0.25%, and the rest is Mg.

[0034] The preparation method of the fast-dissolving high-strength and high-elongation magnesium alloy described in this embodiment, the specific steps are as follows:

[0035] S1. Weigh pure Mg, pure Al, pure Zn, pure Ga, pure In, Mg-Gd master alloy, Mg-Y master alloy, Mg-Zr master alloy, Mg-Sc master alloy, Mg- Cu master alloy, Mg-Li master alloy, Mg-Ni master alloy;

[0036] S2. Preheating the raw materials except pure Ga in step S1 at 150° C. for 2 hours;

[0037] S3. Mix all the raw materials, heat the mixed raw materials to 720°C in a crucible resistance furnace, melt for 30 minutes, add the first refining agent, refine for 30 minutes, remove the inclusions in the melt, and then use...

Embodiment 2

[0044] The fast-dissolving high-strength and high-elongation magnesium alloy described in this embodiment is composed of the following elements in mass percentage: Gd 1.5%, Y 0.5%, Al 0.1%, Zn 0.1%, Zr 0.2%, Sc 0.001%, Cu 0.1%, Li 0.01%, Ni 0.01%, Ga 0.01%, In 0.01%, and the rest is Mg.

[0045] The preparation method of the fast-dissolving high-strength and high-elongation magnesium alloy described in this example is the same as that in Example 1.

Embodiment 3

[0047] The fast-dissolving high-strength and high-elongation magnesium alloy described in this embodiment is composed of the following elements in mass percentage: Gd 14.5%, Y 2.0%, Al 2.0%, Zn 1.0%, Zr 0.5%, Sc 0.02%, Cu 2.0%, Li 0.5%, Ni 0.5%, Ga 0.5%, In 0.5%, and the rest is Mg.

[0048] The preparation method of the fast-dissolving high-strength and high-elongation magnesium alloy described in this example is the same as that in Example 1.

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Abstract

The invention provides a high-strength and high-ductility magnesium alloy capable of being dissolved rapidly and a preparation method thereof. The high-strength and high-ductility magnesium alloy capable of being dissolved rapidly comprises, by mass, 1.0%-22.0% of Gd, 0.001%-5.0% of Y, 0.001%-10% of Al, 0.001%-5.0% of Zn, 0.01%-1.0% of Zr, 0.0001%-1.0% of Sc, 0.01%-10.0% of Cu, 0.01%-3.0% of Li, 0.01%-3.0% of Ni, 0.01%-3.0% of Ga, 0.01%-3.0% of In, and the balance Mg and impurities, wherein the total content of Li, Ga and In is 0.1%-6.0%. The high-strength and high-ductility magnesium alloy capable of being dissolved rapidly can react with a water-soluble medium rapidly so as to be dissolved, has the mechanical strength properties of high strength and high ductility, and can meet the application requirements in various industrial fields.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a fast-dissolving high-strength and high-elongation magnesium alloy and a preparation method thereof. Background technique [0002] In some special construction fields, such as oil and natural gas exploration, a large number of downhole mining tools, such as fracturing balls and bridge plugs, are required. These tools need to have mechanical properties that meet their application functions. Secondly, in order to improve engineering progress It also requires that these tools can be dissolved quickly after failure, without recycling, and at the same time, it can avoid the waste of resources when recycling tools. [0003] Magnesium alloy is an alloy composed of magnesium and other elements. It is characterized by low density, high specific strength, good heat dissipation, good shock absorption, easy machining, good corrosion resistance of organic matter...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/03C22F1/06E21B33/134E21B43/26
CPCC22C1/03C22C23/06C22F1/06E21B33/134E21B43/26
Inventor 胡毅唐廷基骆晓楠
Owner FIVE STAR DOWNHOLE SERVICE INC
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