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A low-cost high-plasticity soluble magnesium alloy material and its preparation method

A magnesium alloy, high plasticity technology, applied in the field of metal materials, can solve the problems of low corrosion rate, poor plasticity and high production cost, and achieve the effects of low cost, good plasticity and rapid dissolution

Active Publication Date: 2022-02-01
大同高镁科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing magnesium alloy materials have low corrosion rate and poor plasticity, which cannot meet the actual needs of oil and gas mining tools, and the production cost is high. It is necessary to provide a new type of magnesium alloy material with high plasticity, high strength and good corrosion rate. and low production costs to meet the needs of the oil and gas industry

Method used

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  • A low-cost high-plasticity soluble magnesium alloy material and its preparation method
  • A low-cost high-plasticity soluble magnesium alloy material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Mg-3Al-1Zn-0.5Mn-0.1Ca-0.3Ni-0.1Si-0.15Sn alloy

[0024] Weigh the required alloy raw materials in proportion, add pure magnesium into the crucible to melt at 750 ° C, and pass through gas protection, sprinkle refining agent, add other metal raw materials after the pure magnesium is completely melted, stir and remove slag, and perform drawing casting, drawing The casting speed was 20 cm / min. Subsequently, the ingot was subjected to homogenization treatment, and the holding temperature was 350° C. for 48 hours. The homogenized ingot is processed into a cylinder for extrusion processing, the extrusion temperature is 320°C, the extrusion speed is 5mm / s, and the extrusion ratio is 5. After extrusion, the rods are subjected to aging treatment at a temperature of 170°C for 48 hours.

[0025] The room temperature tensile strength of the Mg-3Al-1Zn-0.5Mn-0.1Ca-0.3Ni-0.1Si-0.15Sn alloy obtained by the above steps is 300MPa, the yield strength is 218MPa, and the elon...

Embodiment 2

[0026] Example 2: Mg-9Al-0.7Zn-0.3Mn-0.3Ca-0.2Ni-0.2Si alloy

[0027] Weigh the required alloy raw materials in proportion, add pure magnesium to the crucible to melt at 780 ° C, and pass through gas protection, sprinkle refining agent, add other metal raw materials after the pure magnesium is completely melted, stir and remove slag, and perform drawing casting, drawing The casting speed was 20 cm / min. Subsequently, the ingot was subjected to homogenization treatment, and the holding temperature was 400° C. for 40 hours. The homogenized ingot was processed into a cylinder for extrusion processing, the extrusion temperature was 340°C, the extrusion speed was 2mm / s, and the extrusion ratio was 5. After extrusion, the rods are subjected to aging treatment at a temperature of 150°C for 36 hours.

[0028] The room temperature tensile strength of the Mg-9Al-0.7Zn-0.3Mn-0.3Ca-0.2Ni-0.2Si alloy obtained by the above steps is 306 MPa, the yield strength is 217 MPa, and the elongation...

Embodiment 3

[0029] Example 3: Mg-5Al-0.8Zn-0.25Mn-0.5Ca-0.1Ni-0.6Sn alloy

[0030] Weigh the required alloy raw materials in proportion, add pure magnesium into the crucible to melt at 800 ° C, and pass through the gas protection, sprinkle refining agent, after the pure magnesium is completely melted, add other metal raw materials, stir and remove slag, and perform drawing casting, drawing The casting speed was 15 cm / min. Subsequently, the ingot was subjected to homogenization treatment, the holding temperature was 350° C., and the time was 30 h. The homogenized ingot is processed into a cylinder for extrusion processing, the extrusion temperature is 380°C, the extrusion speed is 1mm / s, and the extrusion ratio is 8. After extrusion, the rods are subjected to aging treatment at a temperature of 200°C for 30 hours.

[0031] The room temperature tensile strength of the Mg-5Al-0.8Zn-0.25Mn-0.5Ca-0.1Ni-0.6Sn alloy obtained by the above steps is 286 MPa, the yield strength is 184 MPa, and the...

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Abstract

The invention discloses a low-cost high-plasticity soluble magnesium alloy material and a preparation method thereof. The magnesium alloy is composed of Mg a Al b Zn c mn d Ca e Ni f Si g sn h , where a, b, c, d, e, f, g, h represent the mass fraction of each element respectively, the range of b is 3‑9%, the range of c is 0.7‑1%, and the range of d is 0.25‑0.5 %, the range of e is 0.01‑0.5%, the range of f is 0.01‑0.3%, the range of g is 0.1‑0.2%, the range of h is 0.15‑0.6%, a+b+c+d+e+f+ g+h=100%. After smelting, casting, heat treatment, hot extrusion and aging treatment, the desired alloy material is obtained. Compared with the prior art, the magnesium alloy material prepared by adopting the composition and process of the present invention has low cost, convenient production, and the finished product has good strength and high plasticity, and can be quickly dissolved in a solution containing a trace amount of electrolyte , suitable for processing and preparing soluble downhole tools used in the fracturing process of oil and gas fields. The downhole tools made of this material can be dissolved by themselves after the end of service, eliminating the need for subsequent flowback, drilling and milling, etc., which greatly improves the Improve construction efficiency, save construction cost and reduce energy consumption.

Description

technical field [0001] The present invention relates to the preparation of a magnesium alloy material in the field of metal materials, in particular to a low-cost high-plasticity soluble magnesium alloy material and a preparation method thereof. Background technique [0002] Most of China's low-permeability oil and gas resources are distributed in formations of different depths, and 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 tools are made of steel, aluminum alloy, polymer materials, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C23/02C22C23/04C22C1/03C22F1/06
CPCC22C23/00C22C23/02C22C23/04C22C1/03C22F1/06
Inventor 仝仲盛白玉凤仝仲强李宏祥张济山
Owner 大同高镁科技有限公司
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