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Magnesium-based brazing filler metal alloy and preparation method thereof

A brazing filler metal and alloy technology, applied in the field of magnesium alloy brazing filler metal and magnesium-based brazing filler metal alloy, can solve problems such as unstable brazing filler metal quality and performance, influence on brazing filler metal macrostructure, and lower working temperature, so as to improve spreadability, Low cost and improved shear strength

Inactive Publication Date: 2010-01-13
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The characteristic of this series of alloys is that the working temperature is reduced, but the overall spreading area is not as high as the above-mentioned Mg-Al-Zn-based solder alloys.
In addition, a large amount of covering agent is used in its preparation. First, the impurity elements in the covering agent can easily enter the alloy and affect the microstructure of the alloy. In addition, the inclusions in the covering agent are easily involved in the alloy when pouring into an ingot and affect the quality of the solder. The macrostructure will eventually lead to the instability of the quality and performance of the solder

Method used

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  • Magnesium-based brazing filler metal alloy and preparation method thereof

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Embodiment 1

[0023] Embodiment 1: Take 80g pure Al ingot, 5330g pure Mg ingot, 200g pure Sn bar, 0.15g pure Be block, 0.15g pure Te ingot, 260g pure Bi powder, 3927g pure Zn bar, 200g Mg-La intermediate alloy block (Wherein the mass percent composition of La is 15%) put in SF 6 Heat and melt in an electric furnace crucible in a protective atmosphere. When the temperature rises to 680-700°C, keep it warm for 5-10 minutes and then pour it into a steel ingot mold preheated to 200°C to cool to obtain a magnesium-based solder alloy.

Embodiment 2

[0024] Embodiment two: get 50g pure Al ingot, 4873g pure Mg ingot, 50g pure Sn bar, 0.3g pure Be block, 0.3g pure Te ingot, 800g pure Bi powder and 3959g pure Zn ingot, 267g Mg-La alloy block ( Wherein the mass percent content of La is 15%), put in the electric furnace crucible of SF6 protection atmosphere, heat and melt, when temperature rises to 680~700 ℃, pour into the steel ingot that preheats to 200 ℃ after keeping warm for 5~10 minutes After cooling in the mold, a magnesium-based solder alloy is obtained.

Embodiment 3

[0025] Embodiment three: according to 0.5%Al, 51%Mg, 0.5%Sn, 0.001%Be, 0.001%Te, 0.1%La, 2.6%Bi, all the other are Zn weight percent to carry out batching, prepare according to the method of embodiment one, obtain product1.

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Abstract

The invention provides a magnesium-based brazing filler metal alloy with low working temperature and favorable welding performance as well as a preparation method thereof. The alloy comprises the following components in percentage by weight: 0.5-1.1 percent of Al, 51-60 percent of Mg, 0.5-3 percent of Sn, 0.001-0.003 percent of Be, 0.001-0.003 percent of Te, 0.1-0.4 percent of La, 2.6-8 percent of Bi, and the balance of Zn. The preparation method of the magnesium-based brazing filler metal alloy comprises the following steps: dispensing all materials according to weight percentage; heating and melting the dispensed materials in an electric stove crucible under the SF6 protective atmosphere, wherein the weight percentage of La in the middle alloy from Mg to La is 15 percent; preserving the temperature for 5-10 minutes when the temperature rises to 680-700 DEG C; and casting in a steel ingot mould which is preheated to 200 DEG C and then cooling to obtain the magnesium-based brazing filler meta alloy.

Description

1. Technical field [0001] The invention relates to a magnesium alloy solder with convenient operation and good welding performance, in particular to a magnesium-based solder alloy and belongs to the technical field of material processing. 2. Background technology [0002] In recent years, with the improvement of the properties of magnesium alloy materials and the expansion of application fields, the welding technology of magnesium alloys has become a hot spot in the field of welding research worldwide. However, due to the uniqueness of magnesium alloys, magnesium alloys have a low melting point (≤650°C), have a strong interaction with oxygen, and are easy to oxidize and burn during welding and heating, so the connectivity of magnesium alloys has attracted people's attention. The existing magnesium alloy solder and its preparation have problems such as high cost, high melting point, poor process performance and the like. [0003] Solder refers to the filler added in the gap ...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/40
Inventor 王玲赵浩峰张帅孙磊
Owner NANJING UNIV OF INFORMATION SCI & TECH
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