High-temperature soluble aluminum alloy, preparation method and application

A technology of aluminum alloy and aluminum alloy material, which is used in earth-moving drilling, wellbore/well components, sealing/packaging, etc. Soluble aluminum alloys have poor high temperature resistance and other problems, so as to ensure the stability of refinement and dissolution properties, improve mechanical properties, and reduce ingot segregation.

Active Publication Date: 2022-07-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the soluble aluminum alloy all-metal bridge plug expansion ring is used in a high temperature environment, due to the poor high temperature resistance of the ordinary soluble aluminum alloy, the mechanical properties such as tensile strength and hardness of the material are reduced. At the same time, due to the high temperature, the soluble The dissolution rate of aluminum alloy is accelerated, the controllability is poor, and the mechanical index requirements required for work and the effective time required to complete the work cannot be provided, which limits its scope of use.

Method used

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Effect test

preparation example Construction

[0025] The preparation method of the high temperature soluble aluminum alloy of the present invention comprises the following steps:

[0026] Step 1), each element is weighed according to the weight percentage ratio of each component of the above-mentioned soluble aluminum alloy, Mg is introduced with Al-Mg master alloy, Ga is introduced with Al-Ga master alloy, and In is introduced with Al-In master alloy , Sn is introduced by Al-Sn master alloy, and insufficient AL is introduced by pure aluminum ingot;

[0027] Step 2), under the protection of argon gas, first melt pure aluminum, and when the temperature of the molten metal reaches 715-735 ° C, add Al-Mg master alloy, Al-Ga master alloy, and Al-In master alloy to the aluminum liquid in turn. , Al-Sn master alloy is smelted; heated to 850-900 ℃ and kept for 1-2 hours, all melted and then refined, and the obtained aluminum alloy liquid was kept at 850-870 ℃ for 5-10 minutes and then 5- 8°C / s to rapidly cool down to 50-80°C, t...

Embodiment 1

[0035] High temperature soluble aluminum alloy, in weight percent, each element composition: Mg 1.5wt%, Ga 0.1wt%, In0.7wt%, Sn 0.6wt%, the balance is Al and inevitable impurity elements.

[0036] Its preparation method is as follows:

[0037] Step 1), weighing raw materials according to the above-mentioned proportions: weighing pure aluminum ingot, Al-Mg master alloy, Al-Ga master alloy, Al-In master alloy, and Al-Sn master alloy.

[0038] After weighing the raw material, sand the surface of the raw material to remove the surface oxide layer.

[0039] Step 2), smelting and casting: first place pure aluminum in a graphite crucible for heating and melting, and use argon gas protection during the melting process. After all the pure aluminum is melted, the temperature of the melt is raised to 715 ° C and each master alloy is added, and the temperature is continued to 850 ℃ and hold for 2 hours, confirm that all melting is carried out for refining treatment; after the aluminum al...

Embodiment 2

[0047] High temperature soluble aluminum alloy, in weight percent, each element composition: Mg 1.5wt%, Ga 0.1wt%, In0.7wt%, Sn 0.6wt%, the balance is Al and inevitable impurity elements.

[0048] Its preparation method is as follows:

[0049] Step 1), weigh the raw materials according to the above proportions: weigh out pure aluminum ingot, Al-Mg master alloy, Al-Ga master alloy, Al-In master alloy, and Al-Sn master alloy.

[0050] After weighing the raw material, sand the surface of the raw material to remove the surface oxide layer.

[0051] Step 2), smelting and casting: first place pure aluminum in a graphite crucible for heating and melting, and use argon gas protection during the melting process. After all the pure aluminum is melted, the temperature of the melt is raised to 735 ° C and each intermediate alloy is added, and the temperature is continued to rise to 900 ℃ and hold for 1 hour, confirm that all melting is carried out for refining; the aluminum alloy melt is...

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Abstract

The invention discloses a high-temperature soluble aluminum alloy, a preparation method and application, and the aluminum alloy comprises the following elements in percentage by weight: 1.5 wt% of Mg, 0.1 wt% of Ga, 0.7 wt% of In, 0.6 wt% of Sn and the balance of Al and inevitable impurity elements. The soluble aluminum alloy is obtained through smelting and ingot casting of all the components and then heat treatment and aging treatment. The soluble aluminum alloy material can be used as a material of a fracturing tool for shale oil and gas exploitation. The soluble aluminum alloy prepared through the method is controllable in dissolution in a high-temperature environment and good in mechanical property and dissolution rate.

Description

technical field [0001] The invention belongs to the technical field of alloy preparation, in particular to a high-temperature soluble aluminum alloy, a preparation method and an application. Background technique [0002] In the oil and gas exploration in recent years, my country has abundant unconventional oil and gas resources, among which the reserves of shale gas and shale oil rank among the top in the world. Relying on hydraulic fracturing and other technologies, the development of bridge plugs is one of the most important technologies in multi-layer and multi-stage fracturing technology. Tools made of soluble materials can dissolve in the underground environment by themselves after completing the operation, eliminating the need for manual drilling, grinding and recycling processes, reducing engineering risks and improving construction efficiency. [0003] The expansion ring is a component that can fix objects by expanding and contracting. Because the expansion ring has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06C22C1/03C22C1/06C22F1/047C21D8/06B22D7/00E21B33/134
CPCC22C21/06C22C1/026C22C1/03C22C1/06C22F1/047C21D8/06B22D7/005E21B33/134E21B2200/08Y02P10/20
Inventor 郭恒鹏马宁朱建锋常柯冀时雨张科秦毅
Owner SHAANXI UNIV OF SCI & TECH
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