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Low-melting-point aluminum alloy brazing filler metal and manufacturing method thereof

An aluminum alloy, low melting point technology, applied in welding equipment, metal processing equipment, welding/cutting media/materials, etc., can solve the problems of low magnesium content and high welding temperature, and achieve improved wettability and welding The effect of low temperature and narrow melting range

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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  • Low-melting-point aluminum alloy brazing filler metal and manufacturing method thereof
  • Low-melting-point aluminum alloy brazing filler metal and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Formula: Mg1.5g, Cu12g, Y0.5g and Al-12Si master alloy 86.5g.

[0028] 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

[0030] Formula: Mg3g, Cu25g, Y1g and Al-12Si master alloy 95g.

[0031] 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

[0033] Formula: Mg2g, Cu18g, Y0.7g and Al-12Si master alloy 93g.

[0034] 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 low-melting-point aluminum alloy brazing filler metal and a manufacturing method thereof. The brazing filler metal is composed of, by weight percentage, 0.5 to 3 parts of Mg, 3 to 25 parts of Cu, 0.1 to 1 part of Y and 75 to 95 parts of Al-12Si intermediate alloy. Raw materials are taken, smelted and cast, so that the brazing filler metal is obtained. The brazing filler metal has the beneficial effects that the melting point is low and lower than 550 DEG C, the melting interval is narrow, the welding application temperature is low, the spreadability, the gap filling performance, the wettability and the joint comprehensive performance are good, and the brazing filler metal 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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IPC IPC(8): B23K35/24B23K35/40
CPCB23K35/24B23K35/40B23K2103/10
Inventor 伍玉娇罗弦
Owner GUIZHOU INST OF TECH