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Medium temperature aluminum alloy brazing solder and preparing method thereof

A technology for aluminum alloys and master alloys, applied in welding equipment, metal processing equipment, welding/cutting media/materials, etc., can solve problems such as high welding temperature and low percentage of magnesium, achieve low welding temperature, improve Good wettability and wetting effect

Inactive Publication Date: 2016-03-30
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two eutectic points of Al-Si-Mg alloy phase diagram are L→Al and L→Al+Si+Mg respectively 2 Si (eutectic temperature 557°C), the percentage of magnesium is very low at this time, but the welding temperature is still high

Method used

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  • Medium temperature aluminum alloy brazing solder and preparing method thereof
  • Medium temperature aluminum alloy brazing solder and preparing method thereof
  • Medium temperature aluminum alloy brazing solder and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Formula: Mg1.5g, Cu12g and Al-12Si master alloy 86.5g.

[0029] Preparation method: take raw materials, smelt, the smelting temperature is 700-800°C, preheat the mold to 390-410°C, pour, pour, and get ready.

Embodiment 2

[0031] Recipe: Mg3g, Cu25g and Al-12Si master alloy 95g.

[0032] Preparation method: take raw materials, smelt, the smelting temperature is 700-800°C, preheat the mold to 390-410°C, pour, pour, and get ready.

Embodiment 3

[0034] Formula: Mg2g, Cu18g, Al-12Si master alloy 93g.

[0035] Preparation method: take raw materials, smelt, the smelting temperature is 700-800°C, preheat the mold to 390-410°C, pour, pour, and get ready.

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Abstract

The invention discloses medium temperature aluminum alloy brazing solder and a preparing method thereof. The medium temperature aluminum alloy brazing solder comprises, by weight proportion, 0.5-3 parts of Mg, 3-25 parts of Cu, 1-2 parts of Al and 75-95 parts of a Si intermediate alloy. The preparing method comprises the steps of raw material taking, smelting and pouring. The solder has the beneficial effects of being low in melting point (lower than 550 DEG C), narrow in fusion zone and low in welding temperature; the good spreadability, the good gap filling performance, the good wettability and the good connector comprehensiveness are achieved; and the medium temperature aluminum alloy brazing solder is suitable for vacuum brazing.

Description

technical field [0001] The invention relates to an aluminum alloy brazing filler metal and a preparation method thereof, in particular to a medium-temperature aluminum alloy filler metal with low melting point and good spreading performance and a preparation method thereof. Background technique [0002] Modern industry has higher and higher requirements for product lightweight. Aluminum alloy itself has the advantages of corrosion resistance, light weight, and easy processing, replacing the traditional steel structure. With the research and development of aluminum alloy in my country, the production technology of aluminum alloy is becoming more and more mature, so it is widely used in aerospace, Ships, automobiles and other fields. [0003] Al-Si based solder is based on the Al-Si eutectic composition. The Al-Si eutectic temperature is 577°C, and the brazing temperature is mostly 600-605°C. It cannot be used for aluminum alloys with an overburning temperature lower than 610°...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40
CPCB23K35/286B23K35/40
Inventor 伍玉娇罗弦
Owner GUIZHOU INST OF TECH