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A kind of ultra-high strength dissolvable magnesium alloy and its preparation method and application

An ultra-high-strength, magnesium alloy technology, applied in the direction of earthwork drilling, wellbore/well components, mining fluids, etc., can solve the problems that high-strength soluble magnesium alloys cannot meet, and achieve high tensile strength and high dissolution rate Effect

Active Publication Date: 2020-03-24
重庆昱华新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Although the strength of the existing soluble magnesium alloys is relatively high, the inventors have found in practical applications that when performing staged fracturing under complex geological conditions, higher strength soluble magnesium alloys are required, and the above-mentioned high strength can be Dissolved magnesium alloys cannot meet the needs of this working condition

Method used

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  • A kind of ultra-high strength dissolvable magnesium alloy and its preparation method and application
  • A kind of ultra-high strength dissolvable magnesium alloy and its preparation method and application
  • A kind of ultra-high strength dissolvable magnesium alloy and its preparation method and application

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Embodiment 1

[0052] The ultra-high-strength dissolvable magnesium alloy described in this embodiment is composed of the following elements in mass percentage: Sm8.0wt%, Sc 0.1wt%, Zn 1.0wt%, Ag 0.25wt%, Cu 1.0wt%, Ni 0.5wt% %, the mass percentage of impurity elements is 0%-0.1%, and the rest is Mg.

[0053] The preparation method of the ultra-high strength dissolvable magnesium alloy described in this embodiment is as follows:

[0054] 1. Weigh the raw materials according to the ratio of the above mass percentages. The above raw materials are pure magnesium ingots, pure zinc ingots, pure silver powder, pure copper, Mg-Sm master alloys, Mg-Sc master alloys, and Mg-Ni master alloys.

[0055] 2. Under the protection of argon, melt at 720°C, melt for 40 minutes, stir for 20 minutes, and refine for 30 minutes. After refining, heat up to 760°C, stand for 40 minutes, and cast at 660°C to form a semi-continuous ingot;

[0056] 3. Take the above ingot for homogenization treatment, at 480°C, hold f...

Embodiment 2

[0061] The ultra-high-strength dissolvable magnesium alloy described in this embodiment is composed of the following elements in mass percentage: Sm10.0wt%, Sc 0.2wt%, Zn 1.4wt%, Ag 0.5wt%, Cu 2.0wt%, Ni 1.2wt% %, the mass percentage of impurity elements is 0%-0.1%, and the rest is Mg.

[0062] The preparation method of the ultra-high strength dissolvable magnesium alloy described in this embodiment is as follows:

[0063] 1. Weigh the raw materials according to the ratio of the above mass percentages. The above raw materials are pure magnesium ingots, pure zinc ingots, pure silver powder, pure copper, Mg-Sm master alloys, Mg-Sc master alloys, and Mg-Ni master alloys.

[0064] 2. Under the protection of argon, melt at 740°C, melt for 60 minutes, stir for 20 minutes, and refine for 40 minutes. After refining, heat up to 760°C, stand for 40 minutes, and cast at 680°C to form a semi-continuous ingot;

[0065] 3. Take the above ingot for homogenization treatment, at 480°C, hold f...

Embodiment 3

[0070] The ultra-high-strength dissolvable magnesium alloy described in this embodiment is composed of the following elements in mass percentage: Sm7.0wt%, Sc 0.05wt%, Zn 0.2wt%, Ag 0.25wt%, Cu 0.5wt%, Ni 0.5wt% %, the mass percentage of impurity elements is 0%-0.1%, and the rest is Mg.

[0071] The preparation method of the ultra-high strength dissolvable magnesium alloy described in this embodiment is as follows:

[0072] 1. Weigh the raw materials according to the ratio of the above mass percentages. The above raw materials are pure magnesium ingots, pure zinc ingots, pure silver powder, pure copper, Mg-Sm master alloys, Mg-Sc master alloys, and Mg-Ni master alloys.

[0073] 2. Under the protection of argon, melt at 710°C, melt for 30 minutes, stir for 10 minutes, and refine for 30 minutes. After refining, heat up to 740°C, stand for 30 minutes, and cast at 650°C to form a semi-continuous ingot;

[0074] 3. Take the above ingot for homogenization treatment, at 400°C, hold ...

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Abstract

The invention relates to an ultrahigh-strength soluble magnesium alloy. The ultrahigh-strength soluble magnesium alloy comprises the following components of, in percentage by mass, 6.0-10.0wt% of Sm,0.05-0.2wt% of Sc, 0.2-1.4wt% of Zn, 0.2-0.5wt% of Ag, 0.5-2.0wt% of Cu, 0.5-1.2wt% of Ni, 0%-0.1% of impurity elements and the balance Mg. The preparation method comprises the following steps that the raw materials are mixed according to proportion, the mixture is smelted and refined to obtain melt, the melt is subjected to casting to obtain a cast ingot, the cast ingot is subjected to homogenization treatment on to obtain a blank, the blank is extruded to obtain a forming part, and the forming part is subjected to aging strengthening treatment to obtain the magnesium alloy. The tensile strength of the magnesium alloy is greater than or equal to 520 MPa, and the dissolution rate of the magnesium alloy in 3% KCl solution at 93 DEG C is 52-94 mg * cm <-2> h<-1>.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy material preparation, and in particular relates to an ultrahigh-strength dissolvable magnesium alloy and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Due to insufficient reservoir pressure in oil production, fracturing components in fracturing technology may be stuck in the pipe string and cannot be flowed back to the ground, which requires manual removal. This method is time-consuming and costly, and the rejects are prone to clogging. An effective solution to this problem is to use soluble magnesium alloys to process the corresponding parts, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06E21B43/26
CPCC22C1/03C22C23/06C22F1/06E21B43/26
Inventor 林涛刘运腾周吉学刘聪张琳琳王金伟
Owner 重庆昱华新材料科技有限公司
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