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A kind of instant magnesium alloy and preparation method thereof

A magnesium alloy, instant technology, applied in the field of metal materials, can solve the problem of low corrosion rate, and achieve the effect of improving construction efficiency, high mechanical strength and good plasticity

Active Publication Date: 2021-03-12
重庆昱华新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the corrosion rate of existing magnesium alloy materials is not high, and it cannot meet the actual needs of oil and gas exploration tools. It is necessary to provide a magnesium alloy material with a higher corrosion rate to meet industrial needs

Method used

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  • A kind of instant magnesium alloy and preparation method thereof
  • A kind of instant magnesium alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Mg-3.5Cu-0.5Ni-1RE alloy

[0023] Weigh the required alloy raw materials in proportion, polish the alloy surface and clean and dry it. Add the alloys one by one into the crucible to melt, keep the temperature at 750°C for 10 minutes and then cool down to 710°C for casting. The casting mold is a water-cooled copper mold. Subsequently, the ingot was subjected to homogenization treatment, and the holding temperature was 500° C. for 15 hours. The homogenized ingot was processed into a cylinder for extrusion processing, the extrusion temperature was 450° C., the extrusion speed was 0.4 mm / s, and the extrusion ratio was 16. After extrusion, the rods are subjected to aging treatment at a temperature of 200°C for 12 hours.

[0024] The room temperature tensile strength of the Mg-3.5Cu-0.5Ni-1RE alloy obtained by the above steps is 280MPa, the yield strength is 190MPa, the elongation is as high as 11%, and the corrosion rate in 0.05% KCl solution is about 15mg / ...

Embodiment 2

[0025] Embodiment 2: Mg-3.5Cu-3Ni-1.5RE alloy

[0026] Weigh the required alloy raw materials in proportion, polish the alloy surface and clean and dry it. Add the alloys one by one into the crucible to melt, keep the temperature at 750°C for 10 minutes and then cool down to 730°C for casting. The casting mold is a water-cooled copper mold. Subsequently, the ingot was subjected to homogenization treatment, and the holding temperature was 500° C. for 15 hours. The homogenized ingot was processed into a cylinder for extrusion processing, the extrusion temperature was 450° C., the extrusion speed was 0.4 mm / s, and the extrusion ratio was 16. After extrusion, the rods are subjected to aging treatment at a temperature of 220°C for 15 hours.

[0027] The room temperature tensile strength of the Mg-3.5Cu-3Ni-1.5RE alloy obtained through the above steps is 320MPa, the yield strength is 240MPa, the elongation is 6%, and the corrosion rate in 0.05% KCl solution is about 55mg / cm 2 / ...

Embodiment 3

[0028] Embodiment 3: Mg-4.5Cu-3.5Ni-3.5RE alloy

[0029] Weigh the required alloy raw materials in proportion, polish the alloy surface and clean and dry it. Add the alloys one by one into the crucible to melt, keep the temperature at 760°C for 10 minutes and then cool down to 730°C for casting. The casting mold is a water-cooled copper mold. Subsequently, the ingot was subjected to homogenization treatment, and the holding temperature was 520° C. for 15 hours. The homogenized ingot was processed into a cylinder for extrusion processing, the extrusion temperature was 450° C., the extrusion speed was 0.4 mm / s, and the extrusion ratio was 16. After extrusion, the rods are subjected to aging treatment at a temperature of 225°C for 15 hours.

[0030] The room temperature tensile strength of the Mg-4.5Cu-3.5Ni-3.5RE alloy obtained by the above steps is 330 MPa, the yield strength is 270 MPa, the elongation is 5%, and the corrosion rate in 0.05% KCl solution at 40 ° C is about 75 ...

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Abstract

The invention discloses a rapidly-dissolved magnesium alloy and a preparation method thereof. The magnesium alloy is composed of Mg-Cu-Ni-Re, wherein the Cu element content is 0.5-6 wt.%, the Ni element content is 0.5-8 wt.%, and the Re element is one or the combination of multiple elements of the three elements of Gd, Y and Nd, and the content is 0.5-6 wt.%. The corresponding alloy is obtained after smelting casting, heat treatment, hot extrusion and aging treatment. Compared with the prior art, the magnesium alloy material prepared by using the components and the process of the preparation method has the high strength and the good plasticity, can be rapidly dissolved in a solution containing a trace of an electrolyte and is suitable for processing and preparing plugging tools used duringthe fracturing process of the oil and gas fields; and the downhole tools prepared by adopting the material can be dissolved automatically after the service is finished, the subsequent flow back, drilling and milling processes are omitted, the construction efficiency is greatly improved, the construction cost is saved, and the energy consumption is reduced.

Description

technical field [0001] The invention relates to the preparation of a magnesium alloy material in the field of metal materials, in particular to an instant magnesium alloy and a preparation method thereof. Background technique [0002] China is rich in low-permeability oil and gas resources, which have great potential for exploration and development. However, most of these oil and gas resources are distributed in formations of different depths. The development of these unconventional oil and gas resources must rely on reservoir stimulation technologies such as hydraulic fracturing. In the hydraulic fracturing technology, isolation tools (such as fracturing balls and bridge plugs) are used to separate different intervals and perform fracturing reconstruction layer by layer. After the construction of all intervals is completed, the isolation tools are discharged so that Open the well to realize the exploitation of oil and gas. [0003] At present, most commonly used isolation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/02C22F1/06
CPCC22C1/02C22C23/00C22F1/06
Inventor 李宏祥冉骁宵王晓华张济山马亮王健袁颖宏
Owner 重庆昱华新材料科技有限公司
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