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High-strength soluble aluminum alloy and preparation method and application thereof

An aluminum alloy, high-strength technology, applied in the field of powder metallurgy, can solve the problems of uneven material dissolution process, complex preparation process, coarse grains of cast aluminum alloy, etc., and achieve the effect of stable and reliable preparation method and easy availability of raw materials

Inactive Publication Date: 2019-11-29
青岛大地新能源技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, degradable resins have application defects that cannot withstand high temperature, high pressure and other fracturing environments, and must be used under special conditions such as light, which are demanding on fracturing environments.
Soluble magnesium alloys do not dissolve or slowly dissolve in pure water or low salinity, and cannot meet the needs of fracturing
[0005] At present, most of the research on degradable downhole temporary plugging tools is to prepare soluble aluminum alloy by melting casting method. However, cast aluminum alloy has the disadvantages of coarse grain and serious phase segregation, which leads to uneven dissolution process of the material and poor mechanical properties. Difficult to improve
For example, Chinese patent 201710217290.9 discloses a method for preparing high-strength degradable aluminum alloys by powder metallurgy, using pre-synthesized metal powders as raw materials, and then pressing and sintering in an argon protective atmosphere. Coarse grains lead to cracks and brittle fractures in the material, resulting in low compressive strength of aluminum alloy materials that cannot meet the requirements of use
[0006] Aiming at the cast aluminum alloy existing in the soluble aluminum alloy material of the downhole temporary plugging tool in the prior art, the crystal grains are coarse and the phase segregation is serious, which leads to the uneven dissolution process of the material, and it is difficult to improve the mechanical properties; the cost is high, the preparation process is complicated and The problem of inefficiency

Method used

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  • High-strength soluble aluminum alloy and preparation method and application thereof
  • High-strength soluble aluminum alloy and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0032] A high-strength soluble aluminum alloy, prepared by powder metallurgy from the following raw materials in mass percentage: Al92.5%, Ga1.5%, In0.5%, Sn0.5%, Cu0.8%, Mg4%, Ti0.2% . The particle size of each of the metal powders is 45 μm, and the Ga is solid.

[0033] A method for preparing a high-strength soluble aluminum alloy, comprising the following steps:

[0034] 1) Weigh the metal powder with a particle size of 45 μm according to the above-mentioned component distribution ratio, wherein the metal Ga is heated and melted, weighed 1% liquid paraffin and 0.6% polyethylene glycol, and fully mixed for 6 hours.

[0035] 2) Weigh a certain amount of uniformly mixed metal powder and put it into a rigid mold for compression molding with a pressure of 300 MPa.

[0036] 3) Put the pressed sample into a nitrogen atmosphere protection furnace for sintering, the heating rate is 2°C / min to the sintering temperature of 600°C, the holding time is 2h, and it is cooled with the fur...

Embodiment 2

[0038] A high-strength soluble aluminum alloy, prepared by powder metallurgy from the following raw materials in mass percentage: Al90.2%, Ga1.75%, In0.75%, Sn0.8%, Cu1%, Mg5%, Ti0.5% . The particle size of each of the metal powders is 150 μm, and the Ga is solid.

[0039]A method for preparing a high-strength soluble aluminum alloy, comprising the following steps:

[0040] 1) Weigh the metal powder with a particle size of 150 μm according to the above-mentioned component distribution ratio, wherein the metal Ga is heated and melted, and 0.5% polyethylene glycol and 0.75% ethylene bisstearamide are weighed and fully mixed for 4 hours.

[0041] 2) Weigh a certain amount of powder and put it into a rigid mold for compression molding with a pressure of 250 MPa.

[0042] 3) Put the pressed sample into a nitrogen atmosphere protection furnace for sintering, the heating rate is 4°C / min to the sintering temperature of 550°C, the holding time is 1h, and it is cooled with the furnace...

Embodiment 3

[0044] A high-strength soluble aluminum alloy is prepared by powder metallurgy from the following raw materials in mass percentage: Al75%, Ga3.8%, In1.5%, Sn0.7%, Cu0.5%, Mg7%. The particle size of each of the metal powders is 90 μm, and the Ga is solid.

[0045] A method for preparing a high-strength soluble aluminum alloy, comprising the following steps:

[0046] 1) The metal powder with a particle size of 90 μm is weighed according to the above-mentioned component distribution ratio, wherein the metal Ga is heated and melted, 1.5% liquid paraffin and 0.6% polyethylene glycol are weighed, and the mixture is fully mixed for 2 hours.

[0047] 2) Weigh a certain amount of uniformly mixed metal powder and put it into a rigid mold for compression molding with a pressure of 500 MPa.

[0048] 3) Put the pressed sample into a nitrogen atmosphere protective furnace for sintering, the heating rate is 6°C / min to the sintering temperature of 590°C, the holding time is 2h, and it is coo...

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Abstract

The invention relates to a high-strength soluble aluminum alloy and a preparation method and application thereof, and belongs to the technical field of powder metallurgy. According to the high-strength soluble aluminum alloy, low-melting-point metal and strengthening elements are added in aluminum-based powder, and a soluble aluminum alloy material is prepared through a powder metallurgy method. Low-melting-point metal elements Ga, In, Sn, Zn, Bi and Pb are added into an aluminum matrix, low-melting-point Al-Ga-In-Sn alloy eutectoid can be formed, and the situation that the aluminum surface isdamaged to form an oxide film is avoided. The ratio and contents of the low-melting-point metal and strengthening metal in the alloy are adjusted, and therefore the solution rate of the soluble aluminum alloy material in a Cl- salt solution can be adjusted. Meanwhile, strengthening elements Cu, Mg, Ti, Si, Fe, Re, Mo and Mn are added, and the functions of solution strengthening and dissolution rate adjusting are achieved. In the prepared high-strength soluble aluminum alloy, compressive strength ranges from 130 MPa to 800 MPa, yield strength ranges from 70 Mpa to 350 Mpa, solubleness is controllable, and the high-strength soluble aluminum alloy can be applied to a petroleum downhole fracture tool. Raw materials can be obtained easily, the preparation method is stable and reliable, and thehigh-strength soluble aluminum alloy is suitable for large-scale production.

Description

technical field [0001] The invention relates to a high-strength soluble aluminum alloy and its preparation method and application, in particular to a high-strength soluble aluminum alloy applicable to oil exploitation, its preparation method and application, and belongs to the technical field of powder metallurgy. Background technique [0002] my country's oil and gas reserves are very rich, but most of them belong to unconventional oil and gas fields with low abundance and low permeability. Geological survey results show that the undeveloped oil and gas fields in my country account for 70% of the total. In the future, as the proportion of low-permeability unconventional oil and gas resources increases in China's oil and gas production, its importance to the steady growth of my country's oil and gas production capacity will increase significantly. Increasing efforts to develop low-permeability oil fields will be of great significance to alleviate my country's oil shortage pro...

Claims

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Application Information

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IPC IPC(8): C22C21/06C22C21/00C22C1/04C22F1/02C22F1/047B22F3/03B22F3/04B22F3/10B22F3/24
CPCB22F3/03B22F3/04B22F3/1007B22F3/24B22F2003/248C22C1/0416C22C21/00C22C21/06C22F1/02C22F1/047
Inventor 支玲玲张东晓温庆志李明宇
Owner 青岛大地新能源技术研究院
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