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A kind of magnesium alloy solder used for rare earth magnesium alloy brazing and preparation method

A technology of magnesium alloy and rare earth magnesium, which is applied in the field of magnesium alloy solder and preparation, can solve the problems of less element burning loss and poor control of temperature changes, and achieve good composition control, no composition pollution, and easy process control Effect

Active Publication Date: 2018-01-12
平邑仁安中医药产业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that it cannot control the temperature change well, especially for low melting point volatile elements, which can effectively reduce the burning loss of elements.

Method used

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  • A kind of magnesium alloy solder used for rare earth magnesium alloy brazing and preparation method

Examples

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Comparison scheme
Effect test

example 1

[0021] Mg-Nd-Cu-Ni-Zn magnesium alloy solder, the solder alloy contains the following components (by weight): 2.3% Nd, 67.4% Mg, 22% Cu, 6.3% Ni, 2% Zn.

[0022] (1) According to the alloy composition 2.3% Nd, 67.4% Mg, 22% Cu, 6.3% Ni, 2% Zn to prepare raw materials, the raw materials used are Cu, Ni and Zn with a purity of more than 99.9% and 95.9% Mg and 3.22% Rare earth magnesium alloys with Nd and trace amounts of other alloying elements;

[0023] (2) Put the prepared raw materials into a graphite crucible, heat and smelt them in a resistance furnace, and use a mixture of potassium chloride and lithium chloride with a mass ratio of 3:1 as a protective agent to cover the raw materials in the smelting process;

[0024] (3) Put the crucible into a resistance furnace, set the temperature to 800°C, and heat it. When the temperature rises to 800°C, stir evenly with a graphite rod and keep warm for 10 minutes. Then the temperature was lowered to 600°C for 10 minutes. Take out...

example 2

[0027] Mg-Nd-Cu-Ni-Zn magnesium alloy solder, the solder alloy contains the following components (by weight): 3% Nd, 61.8% Mg, 28% Cu, 5.5% Ni, 1.7% Zn.

[0028] (1) According to the alloy composition 3% Nd, 61.8% Mg, 28% Cu, 5.5% Ni, 1.7% Zn to prepare raw materials, the raw materials used are Cu, Ni and Zn with a purity of more than 99.9% and 95.9% Mg and 3.22% Rare earth magnesium alloy with Nd and trace amounts of other alloying elements.

[0029] (2) Put the prepared raw materials into a graphite crucible and heat and melt them in a resistance furnace. During the melting process, a mixture of potassium chloride and lithium chloride with a mass ratio of 4:1 is used as a protective agent to cover the raw materials.

[0030] (3) Put the crucible into a resistance furnace, set the temperature to 860°C, and heat it. When the temperature rises to 860°C, stir evenly with a graphite rod and keep warm for 5 minutes. Then lower the temperature to 550°C and keep it warm for 5 minu...

example 3

[0033] Mg-Nd-Cu-Ni-Zn magnesium alloy solder, the solder alloy contains the following components (by weight): 2.5% Nd, 64.7% Mg, 25% Cu, 6% Ni, 1.8% Zn.

[0034] (1) Prepare raw materials according to the alloy composition of 2.5% Nd, 64.7% Mg, 25% Cu, 6% Ni, 1.8% Zn, the raw materials used are Cu, Ni and Zn with a purity of more than 99.9% and 95.9% Mg and 3.22% Rare earth magnesium alloy with Nd and trace amounts of other alloying elements.

[0035] (2) Put the prepared raw materials into a graphite crucible and heat and melt them in a resistance furnace. During the melting process, a mixture of potassium chloride and lithium chloride with a mass ratio of 3.5:1 is used as a protective agent to cover the raw materials.

[0036] (3) Put the crucible into a resistance furnace, set the temperature to 830° C., and heat it. When the temperature rises to 830°C, stir evenly with a graphite rod and keep warm for 8 minutes. Then cool down to 580°C for 8 minutes. Take out the crucib...

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Abstract

The invention discloses magnesium alloy solder used for rare earth magnesium alloy brazing and a preparation method. The magnesium alloy solder comprises, by weight, 2.3%-3% of Nd, 22%-28% of Cu, 5.5%-6.3% of Ni, 1.7%-2% of Zn and the balance Mg. The melting temperature range of the magnesium alloy solder is 465 DEG C-490 DEG C. According to the magnesium alloy solder used for rare earth magnesium alloy brazing, the melting temperature range of the magnesium alloy solder is 465 DEG C-490 DEG C, the brazing temperature range is 525 DEG C-550 DEG C, and the magnesium alloy solder is suitable for rare earth magnesium alloy brazing with the solidus temperature being 550 DEG C or higher. The provided solder is applied to brazing of Mg-1.74Mn-0.264Ce rare earth magnesium alloy and AZ31B magnesium alloy. The room-temperature tensile strength of an overlap joint brazed through the magnesium alloy solder is 136 MPa-145 MPa. According to the preparation method of the magnesium alloy solder used for rare earth magnesium alloy brazing, the technology is simple, the process is easy to control, component control is good, component pollution is avoided, and the method is suitable for producing high-quality solder.

Description

technical field [0001] The invention relates to a magnesium alloy solder used for brazing rare earth magnesium alloys and a preparation method, belonging to the field of magnesium alloy solder. Background technique [0002] Magnesium and its alloys have the advantages of low density, high specific strength, high specific stiffness, excellent damping and shock absorption, thermal conductivity, machinability and recyclability, and are known as "green" engineering materials in the 21st century. Therefore, magnesium and its alloys have important application value in aviation, aerospace, military, transportation, electronics and other industries. At present, the role of rare earth elements in magnesium alloys has attracted widespread attention. The addition of rare earth elements makes magnesium alloys have higher strength and better heat resistance than ordinary magnesium alloys. However, the properties of joints welded by magnesium alloy brazing filler metals are all relative...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28C22C23/00
CPCB23K35/284C22C23/00
Inventor 许祥平庞显锋夏春智邹家生
Owner 平邑仁安中医药产业发展有限公司
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