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Zinc-magnesium based brazing alloy and preparation method thereof

A zinc-magnesium-based brazing and alloy technology, which is applied in the field of zinc-magnesium-based brazing filler metal and alloy brazing filler metals, can solve the problems of unstable filler metal quality and performance, affecting the macroscopic structure of filler metals, lowering working temperature, etc., so as to improve spreading performance, low production cost, and the effect of improving wettability

Active Publication Date: 2011-11-16
常熟紫金知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Zinc-magnesium based brazing alloy and preparation method thereof
  • Zinc-magnesium based brazing alloy and preparation method thereof

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Effect test

Embodiment 1

[0021] Get 130g pure Al ingot, 3417.5g pure Mg ingot, 500g pure Sn bar, 0.5g pure Be block, 150gBi powder, 5712.5g pure Zn ingot, 89.5gMg-Pr intermediate alloy block (wherein Pr mass percentage content is 8% ) for batching, first put Al ingots and Sn bars in the lower part of the crucible, then put in pure Be blocks, Mg-Pr intermediate alloy blocks and pure Bi powder, then put in Mg ingots, and finally place pure Zn ingots. When the temperature rises to 700-725 DEG C, heat it for 4-8 minutes and then pour it into a steel ingot mold preheated to 200 DEG C to cool to obtain the zinc-magnesium-based solder alloy.

Embodiment 2

[0023] 180g pure Al ingot, 3265.5g pure Mg ingot, 320g pure Sn bar, 0.35g pure Be block, 100g pure Bi powder, 6097g pure Zn ingot, 37.5gMg-Pr intermediate alloy block (wherein the mass percentage of Pr is 8%) For batching, first put Al ingots and Sn bars in the lower part of the crucible, then put in pure Be ingots, Mg-Pr intermediate alloy ingots and pure Bi powder, then put in Mg ingots, and finally put in pure Zn ingots. When the temperature rises to 700-725 DEG C, heat it for 4-8 minutes and then pour it into a steel ingot mold preheated to 200 DEG C to cool to obtain the zinc-magnesium-based solder alloy.

Embodiment 3

[0024] Embodiment three, according to 1.2%Al, 33%Mg, 3.1%Sn, 0.031%Be, 0.025%Pr, 0.5%Bi, all the other are the weight percent of Zn to carry out batching, preparation process is the same as embodiment 1, obtains product 1.

[0025] Embodiment four, 1.9%Al, 37%Mg, 6%Sn, 0.06%Be, 0.095%Pr, 2.5%Bi, all the other are the weight percent of Zn to carry out batching, preparation process is the same as embodiment 1, obtains product 2.

[0026] Embodiment five, 1.5% Al, 34% Mg, 4% Sn, 0.045% Be, 0.06% Pr, 1.5% Bi, all the other are the weight percent of Zn to carry out batching, preparation process is the same as embodiment 1, obtains product 3.

[0027] Embodiment six, 1.2% Al, 37% Mg, 6% Sn, 0.031% Be, 0.055% Pr, 2.5% Bi, all the other are the weight percent of Zn to carry out batching, preparation process is the same as embodiment 1, obtains product 4.

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Abstract

The invention provides a zinc-magnesium based brazing alloy with low working temperature and good welding performance and a preparation method thereof. The alloy comprises the following components in percentage by weight: 1.2-1.9 Al, 33-37 Mg, 3.1-6 Sn, 0.0031-0.006 Be, 0.025-0.095 Pr, 0.5-2.5 Bi and the balance of Zn. The preparation method comprises the following steps: heating and melting matched material in a N2 mixing protective atmosphere; firstly, putting Al ingots and Sn strips at the bottom of a crucible; then adding pure Be blocks, Mg-Pr intermediate alloy and pure Bi powder; subsequently adding Mg ingots; and finally adding Zn ingots; keeping the temperature for 4-8 minutes when reaching to 700-725 DEG C, and then casting into a steel ingot mold preheated to 200 DEG C, thereby obtaining the zinc-magnesium based brazing alloy, wherein the weight percent of Pr in the Mg-Pr intermediate alloy is 8 percent.

Description

1. Technical field [0001] The invention relates to a zinc-magnesium-based solder alloy with convenient operation and good welding performance, in particular to a magnesium-zinc-based alloy solder 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 due to their low melting point (≤650°C) and strong interaction with oxygen, they are easy to oxidize and burn during welding and heating, so the connectivity of magnesium alloys has attracted people's attention. The existing magnesium-zinc-based solder alloy and its preparation have problems such as high cost, high melting point, and poor process performance. [0003] Solder refers to the filler added in the g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28B23K35/40
Inventor 赵浩峰王玲孙磊张帅
Owner 常熟紫金知识产权服务有限公司
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