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Magnesium-based amorphous alloy solder used for magnesium alloy brazing and preparation method for magnesium-based amorphous alloy solder

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

Inactive Publication Date: 2015-11-18
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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  • Magnesium-based amorphous alloy solder used for magnesium alloy brazing and preparation method for magnesium-based amorphous alloy solder
  • Magnesium-based amorphous alloy solder used for magnesium alloy brazing and preparation method for magnesium-based amorphous alloy solder

Examples

Experimental program
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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 Prepare Mg, Cu, Ag, Zn, Dy, Gd and Nd raw materials according to the ratio; 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 amperes for the first 10 minutes, 500 amperes for the next 20 minutes, and 300 amperes for the last 20 minutes, thereby fully melting and homogenizing 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...

Embodiment 2

[0029] Example 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 Nd4.5 Prepare Mg, Cu, Ag, Zn, Dy, Gd and Nd raw materials according to the ratio; 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 materials of the first step into a graphite crucible and melt them 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 amperes for the first 10 minutes, 500 amperes for the next 20 minutes, and 300 amperes for the last 20 minutes, thereby fully melting and homogenizing 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 diame...

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 Prepare Mg, Cu, Ag, Zn, Dy, Gd and Nd raw materials according to the ratio; 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 materials of the first step into a graphite crucible and melt them 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 amperes for the first 10 minutes, 500 amperes for the next 20 minutes, and 300 amperes for the last 20 minutes, thereby fully melting and homogenizing 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...

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Abstract

The invention discloses magnesium-based amorphous alloy solder used for magnesium alloy brazing and a preparation method for the magnesium-based amorphous alloy solder. The structural formula of the amorphous alloy solder is Mg66Cu15Ag5Zn4Dy1GdxNd9-x. According to the preparation method, Mg, Cd, Nd, Ni and Zn are mixed in a graphite crucible according to the needed element composition proportion, melted under the protection of argon and poured into a copper die, and then the Mg-Cu-Ag-Zn-Dy-Nd amorphous alloy solder is obtained. The magnesium-based amorphous alloy solder is suitable for magnesium alloy brazing at the solidus temperature of more than 400 DEG C, and has the characteristics of being low in melting point and high in strength. When the heat-resistant magnesium alloy solder is used for Gw103K magnesium alloy brazing, the room temperature shear strength of a brazing overlap joint is 128-136 MPa. The preparation method is simple, easy to operate, good in component control, small in impurity content and 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, and machinery, as well as household goods and sports equipment. However, the performance of the joints welded by the current ma...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/40B23K103/08
CPCB23K35/284B23K35/40B23K2103/08
Inventor 尹健袁柯
Owner NANCHANG HANGKONG UNIVERSITY
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