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A kind of heat-resistant magnesium alloy solder used for rare earth magnesium alloy brazing and preparation method thereof

A magnesium alloy and brazing material technology, which is applied in welding equipment, metal processing equipment, welding/cutting media/materials, etc., can solve the problems of poor heat resistance and low strength, and achieve no component pollution, excellent strength and heat resistance Good effect of performance and composition control

Inactive Publication Date: 2017-03-29
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 kind of heat-resistant magnesium alloy solder suitable for rare earth magnesium alloy brazing and its preparation method, so that it can solve the problems of low strength and poor heat resistance of the existing magnesium alloy solder Problems, providing technical support for brazing of high-strength heat-resistant magnesium alloys

Method used

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  • A kind of heat-resistant magnesium alloy solder used for rare earth magnesium alloy brazing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Mg-Gd-Nd-Ni-Zn magnesium alloy solder, this solder alloy comprises following composition (by weight percentage): 15% Gd, 9% Nd, 5.5% Ni, 2% Zn, all the other are Mg.

[0020] The first step is to prepare raw materials according to the alloy composition, 15% Gd, 9% Nd, 5.5% Ni, 2% Zn and 68.5% Mg, and the purity of all raw materials used is above 99.9%.

[0021] In the second step, the raw materials of the first step are put into a graphite crucible and melted 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. 200 amps for the first 10 minutes, 300 amps for the next 20 minutes, and 500 amps for the final 30 minutes, thereby slowly heating the material until it melts. Then the alloy melt is naturally cooled in a graphite crucible to obtain magnesium alloy solder.

[0022] GW103K (Mg...

Embodiment 2

[0023] Embodiment 2: Mg-Gd-Nd-Ni-Zn magnesium alloy solder, this solder alloy comprises following composition (by weight percentage): 18% Gd, 12% Nd, 5.9% Ni, 1.9% Zn, all the other are Mg.

[0024] The first step is to prepare raw materials according to the alloy composition of 18% Gd, 12% Nd, 5.9% Ni, 1.9% Zn and 62.2% Mg, and the purity of all raw materials used is above 99.9%.

[0025] In the second step, the raw materials of the first step are put into a graphite crucible and melted 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. 200 amps for the first 10 minutes, 300 amps for the next 20 minutes, and 500 amps for the final 30 minutes, thereby slowly heating the material until it melts. Then the alloy melt is naturally cooled in a graphite crucible to obtain magnesium alloy solder.

[0026] GW...

Embodiment 3

[0027] Embodiment 3: Mg-Gd-Nd-Ni-Zn magnesium alloy solder, this solder alloy comprises following composition (by weight percentage): 21% Gd, 15% Nd, 6.3% Ni, 1.7% Zn, all the other are Mg.

[0028] The first step is to prepare raw materials according to the alloy composition of 21% Gd, 15% Nd, 6.3% Ni, 1.7% Zn and 56% Mg, and the purity of all raw materials used is above 99.9%.

[0029] In the second step, the raw materials of the first step are put into a graphite crucible and melted 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. 200 amps for the first 10 minutes, 300 amps for the next 20 minutes, and 500 amps for the final 30 minutes, thereby slowly heating the material until it melts. Then the alloy melt is naturally cooled in a graphite crucible to obtain magnesium alloy solder.

[0030]GW103...

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Abstract

The invention discloses a heat-resistant magnesium alloy brazing filler metal for rare earth magnesium alloy brazing and a preparation method thereof; the magnesium alloy brazing filler metal is composed of 15-21% Gd, 9-15% Nd, and 5.5-6.3% Ni , 2 to 1.7% Zn, and the rest is Mg. The magnesium alloy solder is prepared by mixing in a graphite crucible according to the required element ratio, melting under the protection of argon and cooling naturally to obtain Mg-Gd-Nd-Ni-Zn magnesium alloy solder. The magnesium alloy solder provided by the invention is suitable for brazing Mg-RE rare earth magnesium alloys with a solidus temperature above 545° C., and has high strength and high heat resistance. The preparation method of the magnesium alloy solder provided by the invention has simple process, easy control of the process, better component control, no component pollution, and is suitable for batch production of high-quality solder alloy.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy welding and connection, and relates to a heat-resistant magnesium alloy solder for rare earth magnesium alloy brazing and a preparation method thereof, in particular to a Mg-Gd-Nd-Ni-Zn alloy solder. 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. The main alloying elements of magnesium alloys are Al, Zn and RE. Therefo...

Claims

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Application Information

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