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A kind of magnesium-based amorphous alloy solder for magnesium alloy brazing and preparation method thereof

A technology of amorphous alloys and magnesium alloys, applied in welding equipment, metal processing equipment, welding/cutting media/materials, etc., can solve the problems of high melting point and low strength, and achieve the effect of less impurity content and good composition control

Inactive Publication Date: 2017-05-10
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the existing research, to provide a magnesium-based amorphous alloy solder for magnesium alloy brazing and its preparation method, so that it can solve the problem of low strength of the existing magnesium alloy solder and the existing magnesium-based amorphous alloy solder. Solve the problem of high melting point of amorphous alloys, and further improve the performance of brazing filler metals, providing technical support for brazing of high-performance magnesium alloys

Method used

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  • A kind of magnesium-based amorphous alloy solder for magnesium alloy brazing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, Mg 66 Cu 15 Ag 5 Zn 4 Dy 1 Gd 3 Nd 6 Amorphous Alloy Solder

[0025] The first step, according to Mg 66 Cu 15 Ag 5 Zn 4 Dy 1 Gd 3 Nd 6 Raw materials of Mg, Cu, Ag, Zn, Dy, Gd and Nd are prepared in proportions; the purity of the above-mentioned Mg, Cu, Ag, Zn, Dy, Gd and Nd raw materials are all above 99.9%.

[0026] The second step is to put the raw material of the first step into a graphite crucible and melt it in a high-frequency induction heating furnace. The whole melting is carried out in a sealed chamber with a pure argon atmosphere. The purity of the atmosphere is greater than 99.99%, and the atmosphere pressure is 1 atmosphere. The current is 150 amps for the first 10 minutes, 500 amps for the next 20 minutes, and 300 amps for the last 20 minutes, so as to fully melt and homogenize the raw materials.

[0027] The third step is to pour the alloy melt obtained in the second step into a copper mold with an inner diameter of 8 mm and a ...

Embodiment 2

[0029] Embodiment 2, Mg 66 Cu 15 Ag 5 Zn 4 Dy 1 Gd 4.5 Nd 4.5 Amorphous Alloy Solder

[0030] The first step, according to Mg 66 Cu 15 Ag 5 Zn 4 Dy 1 Gd 4.5 Nd 4.5 Raw materials of Mg, Cu, Ag, Zn, Dy, Gd and Nd are prepared in proportions; the purity of the above-mentioned Mg, Cu, Ag, Zn, Dy, Gd and Nd raw materials are all above 99.9%.

[0031] The second step is to put the raw material of the first step into a graphite crucible and melt it in a high-frequency induction heating furnace. The whole melting is carried out in a sealed chamber with a pure argon atmosphere. The purity of the atmosphere is greater than 99.99%, and the atmosphere pressure is 1 atmosphere. The current is 150 amps for the first 10 minutes, 500 amps for the next 20 minutes, and 300 amps for the last 20 minutes, so as to fully melt and homogenize the raw materials.

[0032] The third step is to pour the alloy melt obtained in the second step into a copper mold with an inner diameter of 8 mm ...

Embodiment 3

[0034] Embodiment 3, Mg 66 Cu 15 Ag 5 Zn 4 Dy 1 Gd 6 Nd 3 Amorphous Alloy Solder

[0035] The first step, according to Mg 66 Cu 15 Ag 5 Zn 4 Dy 1 Gd 6 Nd 3 Raw materials of Mg, Cu, Ag, Zn, Dy, Gd and Nd are prepared in proportions; the purity of the above-mentioned Mg, Cu, Ag, Zn, Dy, Gd and Nd raw materials are all above 99.9%.

[0036] The second step is to put the raw material of the first step into a graphite crucible and melt it in a high-frequency induction heating furnace. The whole melting is carried out in a sealed chamber with a pure argon atmosphere. The purity of the atmosphere is greater than 99.99%, and the atmosphere pressure is 1 atmosphere. The current is 150 amps for the first 10 minutes, 500 amps for the next 20 minutes, and 300 amps for the last 20 minutes, so as to fully melt and homogenize the raw materials.

[0037] The third step is to pour the alloy melt obtained in the second step into a copper mold with an inner diameter of 8 mm and a ...

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Abstract

The invention discloses a magnesium-based amorphous alloy solder used for brazing magnesium alloys and a preparation method thereof. The structural formula of the amorphous alloy solder is Mg66Cu15Ag5Zn4Dy1GdxNd9-x, and its preparation is to mix Mg, Cu, Ag, Zn, Dy, Gd and Nd in a graphite crucible according to the required element composition ratio, and melt under the protection of argon , poured in a copper mold to obtain Mg-Cu-Ag-Zn-Dy-Gd-Nd amorphous alloy solder. The magnesium-based amorphous alloy solder provided by the invention is suitable for brazing magnesium alloys with a solidus temperature above 400 DEG C, and has the characteristics of low melting point and high strength. The provided heat-resistant magnesium alloy solder is used for brazing the GW103K magnesium alloy, and the shear strength of the brazed lap joint at room temperature is between 128 and 136 MPa. The preparation method of the present invention is simple and easy to operate, has better component control and less impurity content, and is suitable for preparing high-quality magnesium-based amorphous alloy solder.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy welding and connection, and relates to a magnesium-based amorphous alloy solder for magnesium alloy brazing and a preparation method thereof, in particular to a Mg-Cu-Ag-Zn-Gd-Nd amorphous alloy solder material. Background technique [0002] Magnesium alloy is currently the lightest metal structural material in practical engineering applications. It has the characteristics of low density, high specific strength and specific stiffness, excellent casting, shock absorption, machinability and good dimensional stability, making it ideal for lightweight, It plays a significant role in reducing energy consumption and reducing environmental pollution, and is being increasingly widely used in industrial fields such as automobiles, national defense, aerospace, electronics, machinery, etc., as well as household goods and sports equipment. However, the performance of the joints welded by the current ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28B23K35/40B23K103/08
CPCB23K35/284B23K35/40B23K2103/08
Inventor 尹健袁柯
Owner NANCHANG HANGKONG UNIVERSITY
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