阅读说明：本技术 可溶解铝合金材料、其制备方法及压裂球 (Dissoluble aluminum alloy material, preparation method thereof and fracturing ball ) 是由 赵虎 黄正华 周楠 夏鹏 于 2020-08-07 设计创作，主要内容包括：本发明公开了可溶解铝合金材料、其制备方法及压裂球,涉及金属功能材料技术领域。可溶解铝合金材料,以质量百分比计包括以下成分：Ga 0.01～6.0％、In 0.01～5.5％、Sn 0.01～6.0％、Zn 0.01～7.0％、Mg 0.01～5.0％、Cu 0.01～4.0％、Ce 0.01～3.5％、La 0.01～6.5％,其余为Al。可溶解铝合金材料的制备方法,按照上述成分比例调控原料,能显著提升材料的溶解速率,并使材料的强度满足工艺要求,非常适合于制备压裂球。(The invention discloses a dissolvable aluminum alloy material, a preparation method thereof and a fracturing ball, and relates to the technical field of metal functional materials. The dissolvable aluminum alloy material comprises the following components in percentage by mass: 0.01-6.0% of Ga, 0.01-5.5% of In, 0.01-6.0% of Sn, 0.01-7.0% of Zn, 0.01-5.0% of Mg, 0.01-4.0% of Cu, 0.01-3.5% of Ce, 0.01-6.5% of La and the balance of Al. The preparation method of the dissoluble aluminum alloy material can obviously improve the dissolution rate of the material by regulating and controlling the raw materials according to the component proportion, enables the strength of the material to meet the process requirement, and is very suitable for preparing fracturing balls.)

1. The dissolvable aluminum alloy material is characterized by comprising the following components in percentage by mass: 0.01-6.0% of Ga, 0.01-5.5% of In, 0.01-6.0% of Sn, 0.01-7.0% of Zn, 0.01-5.0% of Mg, 0.01-4.0% of Cu, 0.01-3.5% of Ce, 0.01-6.5% of La and the balance of Al.

2. The dissolvable aluminum alloy material of claim 1, comprising in mass percent: ga 0.1-5.0%, In 0.1-4.5%, Sn 0.1-5.0%, Zn 0.1-6.0%, Mg 0.2-4.5%, Cu 0.1-3.5%, Ce 0.1-3.0%, La 0.1-5.5%, and Al In balance.

3. The dissolvable aluminum alloy material of claim 2, comprising in mass percent: 0.25-4.0% of Ga, 0.3-3.5% of In, 0.25-4.0% of Sn, 0.35-4.5% of Zn, 0.4-4.0% of Mg, 0.15-3.0% of Cu0, 0.15-2.5% of Ce, 0.25-4.0% of La and the balance of Al.

4. The method of making a dissolvable aluminum alloy material according to any of claims 1-3, wherein the aluminum alloy material is prepared from proportioned raw materials.

5. The method of claim 4, comprising the steps of:

preparing a mixture of the raw materials in a molten state into a casting blank, and then carrying out heat treatment;

preferably, the aluminum ingot is melted and then added with other raw materials according to the proportion to prepare a casting blank, and then heat treatment is carried out;

preferably, the aluminum ingot is melted and heated to 700-810 ℃ and is kept warm for 10-60min, and then other raw materials are added.

6. The method according to claim 5, wherein Ga, In, Sn, Zn and Mg are added In the form of pure metals, and Cu, Ce and La are added In the form of aluminum alloys.

7. The method according to claim 5, wherein the preparation of the cast slab comprises: adding the raw materials into molten aluminum melt according to the proportion, heating the melt to 710-840 ℃, preserving the temperature for 20-60min, and then carrying out casting after refining and standing;

preferably, the casting temperature is 700-.

8. The method according to claim 5, wherein the heat treatment process comprises a two-stage solution treatment and a two-stage aging treatment, the two-stage solution treatment is a solution treatment performed at a first stage solution temperature and a second stage solution temperature in sequence, and the second stage solution temperature is greater than the first stage solution temperature; the two-stage aging treatment is sequentially carried out at a first stage aging temperature and a second stage aging temperature, wherein the second stage aging temperature is higher than the first stage aging temperature;

preferably, the first-stage solid solution temperature is 380-480 ℃, and the corresponding solid solution time is 1-5 h; the second-stage solid solution temperature is 400-520 ℃, and the corresponding solid solution time is 1-6 h.

9. The method as claimed in claim 8, wherein the first stage aging temperature is 100-200 ℃, and the corresponding aging time is 5-12 h; the secondary aging temperature is 150-250 ℃, and the corresponding aging time is 6-24 h.

10. A fracturing ball produced from the soluble aluminum alloy material according to any one of claims 1 to 3 or the soluble aluminum alloy material produced by the production method according to any one of claims 4 to 9.

Technical Field

The invention relates to the technical field of metal functional materials, in particular to a dissolvable aluminum alloy material, a preparation method thereof and a fracturing ball.

Background

The fracturing technology is an oil and gas exploitation technology for forming cracks on oil and gas layers by utilizing the hydraulic action, is one of the oil and gas exploitation technologies with the highest use frequency, a fracturing ball is the key for implementing the fracturing technology, and plastic balls or steel balls are mostly used as the fracturing ball in the fracturing operation process in domestic oil fields. However, the specific gravity of the steel ball is high, so that the ball seat of the ball-throwing sliding sleeve is difficult to quickly seat and seal in a horizontal stratum section, and the flow passage of fracturing fluid and oil gas is influenced; the plastic ball is easy to block other pressed cracks in the process of returning to the wellhead, and the output of oil gas is not improved.

In order to adapt to the development of horizontal well fracturing, other materials with light specific gravity are required to be selected to manufacture the fracturing ball. In general, the frac ball needs to meet the following requirements: (1) the density is low; (2) the device can bear the underground working pressure; (3) the processing performance is good; (4) the fracturing fluid is easy to flow back after fracturing or has dissolvability; (5) the rate of dissolution is related to the temperature at which it is used. Based on the requirements, the soluble aluminum alloy is an ideal material for preparing the fracturing ball, but the higher the dissolution rate is, the lower the strength is, and the technological requirements cannot be met.

Disclosure of Invention

The invention aims to provide a dissolvable aluminum alloy material, aiming at improving the dissolution rate of the alloy and keeping the strength of the alloy at a higher level.

Another object of the present invention is to provide a method for preparing a dissolvable aluminum alloy material, which can improve the alloy composition to obtain an aluminum alloy material with a fast dissolution rate.

A third object of the present invention is to provide a fracturing ball having a high dissolution rate and a desirable strength.

The technical problem to be solved by the invention is realized by adopting the following technical scheme.

The invention provides a dissolvable aluminum alloy material which comprises the following components in percentage by mass: 0.01-6.0% of Ga, 0.01-5.5% of In, 0.01-6.0% of Sn, 0.01-7.0% of Zn, 0.01-5.0% of Mg, 0.01-4.0% of Cu, 0.01-3.5% of Ce, 0.01-6.5% of La and the balance of Al.

The invention also provides a preparation method of the dissolvable aluminum alloy material, which is characterized in that the raw materials prepared in proportion are smelted.

The invention also provides a fracturing ball which is prepared from the dissoluble aluminum alloy material or the dissoluble aluminum alloy material prepared by the preparation method.

The embodiment of the invention provides a dissolvable aluminum alloy material, which has the beneficial effects that: ga, In, Sn, Zn, Mg, Cu, Ce and La are introduced into the aluminum alloy, and the solubility of the alloy is regulated and controlled through the Ga, In, Sn and Zn; the strength of the material is improved through Mg and Cu strengthening precipitation; the Ce and the La are used for fine grain strengthening, so that the strength of the material is improved. The inventor achieves the purpose of obviously improving the solubility of the material by regulating and controlling the using amount of the components, and simultaneously can keep the strength of the material at a better level.

The embodiment of the invention also provides a preparation method of the dissolvable aluminum alloy material, the raw materials are regulated and controlled according to the component proportion, the dissolving rate of the material can be obviously improved, the strength of the material meets the process requirement, and the preparation method is very suitable for preparing fracturing balls.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The following describes the soluble aluminum alloy material, the preparation method thereof and the fracturing ball provided by the embodiment of the invention.

The embodiment of the invention provides a dissolvable aluminum alloy material which comprises the following components in percentage by mass: 0.01-6.0% of Ga0.01-5.5% of In, 0.01-6.0% of Sn, 0.01-7.0% of Zn, 0.01-5.0% of Mg, 0.01-4.0% of Cu0.01-3.5% of Ce, 0.01-6.5% of La and the balance of Al.

The dissolving performance of the alloy is regulated and controlled by Ga, In, Sn and Zn; the strength of the material is improved through Mg and Cu strengthening precipitation; the Ce and the La are used for fine grain strengthening, so that the strength of the material is improved. The inventor obviously improves the dissolution rate of the prepared aluminum alloy material by improving the composition and the dosage proportion of the aluminum alloy material, simultaneously maintains the strength at a moderate level, and is suitable for being used as a material for preparing fracturing balls. If the dosage of each component exceeds the above range, the solubility of the material is affected, or the strength of the material is reduced to some extent, especially the dosage of Cu, Ce and La is more significantly affected, Cu can form an Al2Cu phase with Al to play a role in strengthening a precipitated phase, and Ce and La can synergistically refine the grain structure of the aluminum alloy to play a role in strengthening fine grains.

In order to further improve the dissolution rate of the material on the premise of ensuring the strength of the material, the inventor further optimizes the dosage of each component. The composite material comprises the following components in percentage by mass: ga 0.1-5.0%, In 0.1-4.5%, Sn0.1-5.0%, Zn 0.1-6.0%, Mg 0.2-4.5%, Cu 0.1-3.5%, Ce 0.1-3.0%, La 0.1-5.5%, and Al In balance; more preferably, the following ingredients are included: ga 0.25-4.0%, In 0.3-3.5%, Sn 0.25-4.0%, Zn0.35-4.5%, Mg 0.4-4.0%, Cu 0.15-3.0%, Ce 0.15-2.5%, La 0.25-4.0%, and the balance of Al.

The embodiment of the invention also provides a preparation method of the dissoluble aluminum alloy material, which is characterized in that the raw materials prepared according to the proportion are smelted, and the method specifically comprises the following steps:

s1 preparation of casting blank

Melting the aluminum ingot, and adding other raw materials (including raw materials corresponding to Ga, In, Sn, Zn, Mg, Cu, Ce and L) according to a ratio to prepare a casting blank. In some embodiments, the aluminum ingot is melted and heated to 700-810 ℃ and is kept warm for 10-60min, and then other raw materials are added to uniformly mix the components.

In some embodiments, Ga, In, Sn, Zn and Mg are all added as pure metals, and Cu, Ce and La are all added as aluminum alloys, i.e., as Al-Cu, Al-Ce and Al-La master alloys. The addition form of each component is suitable for the problems of easy obtainment of raw materials and cost in consideration.

Specifically, the preparation process of the casting blank comprises the following steps: after the raw materials are added according to the proportion, the melt is heated to 710-840 ℃ and is kept warm for 20-60min, and then the melt is cast after being refined and kept stand; the pouring temperature is 700-820 ℃. Refining and standing are conventional steps and are not described in detail herein. The inventor regulates and controls the casting temperature to ensure that the casting blank has better forming effect and is beneficial to obtaining an alloy material with more uniform texture.

S2, heat treatment

The high-strength aluminum alloy material can be obtained after the casting blank is subjected to heat treatment, in some embodiments, the heat treatment process comprises two-stage solid solution treatment and two-stage aging treatment, wherein the two-stage solid solution treatment is to perform solid solution at a first-stage solid solution temperature and a second-stage solid solution temperature in sequence, and the second-stage solid solution temperature is higher than the first-stage solid solution temperature; the two-stage aging treatment is to perform treatment at a first stage aging temperature and a second stage aging temperature in sequence, wherein the second stage aging temperature is higher than the first stage aging temperature. The inventor creatively adopts a two-stage solid solution and two-stage aging heat treatment process system, and the strength of the material is further improved compared with that of the aluminum alloy heat treatment process.

Specifically, the first-stage solid solution temperature is 380-480 ℃, and the corresponding solid solution time is 1-5 h; the second-stage solid solution temperature is 400-520 ℃, and the corresponding solid solution time is 1-6 h. The first-stage aging temperature is 100-; the secondary aging temperature is 150-250 ℃, and the corresponding aging time is 6-24 h. The specific parameters of the two-stage solid solution and two-stage aging heat treatment are controlled within the range, so that the aim of obviously improving the strength of the material can be fulfilled, and if the treatment temperature and the treatment time exceed the range, the improvement of the strength of the material is not facilitated.

The embodiment of the invention also provides the fracturing ball which is prepared from the dissoluble aluminum alloy material or the dissoluble aluminum alloy material prepared by the preparation method, and the fracturing ball has good dissolubility and ideal strength.

The features and properties of the present invention are described in further detail below with reference to examples.