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High volume fraction grain enhanced aluminum-base compound material brazing filler metal and preparation method thereof

A particle-reinforced aluminum, high volume fraction technology, used in welding equipment, welding/cutting media/materials, welding media, etc., can solve problems such as poor corrosion resistance and poor brazing, and achieve improved bonding quality, strength and plasticity. , the effect of reducing surface tension

Active Publication Date: 2010-06-09
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor brazing performance of high volume fraction particle reinforced aluminum matrix composite materials and poor high temperature resistance and poor corrosion resistance of the brazing seam obtained under the existing welding process, and provide a high volume fraction particle reinforced aluminum matrix composite material hard Brazing self-brazing filler metal and preparation method thereof

Method used

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  • High volume fraction grain enhanced aluminum-base compound material brazing filler metal and preparation method thereof

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specific Embodiment approach

[0011] Specific embodiments: In this embodiment, the high volume fraction particle reinforced aluminum matrix composite material brazing self-brazing filler metal is characterized in that the high volume fraction particle reinforced aluminum matrix composite material brazing self-brazing filler metal is foil-shaped, and its composition is as follows The mass percentage is made of 15%-26% Cu, 4%-10% Si, 0.5%-2% Mg, 0.05%-0.1% Bi, 0.01%-0.03% La, 0.5%-1.0% Li and the balance of Al become.

[0012] The use of this brazing material to braze high volume percentage particle-reinforced aluminum matrix composite materials needs to be carried out in a vacuum state, and the surface of the composite material before welding must be as smooth and flat as possible, after grinding and polishing, the brazing temperature 550~570℃, the vacuum degree is 10×10 -3 Pa, apply a certain pressure.

[0013] The invention is suitable for the brazing of the silicon carbide particle reinforced aluminum ...

specific Embodiment approach 2

[0014] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the composition of high volume fraction particle reinforced aluminum matrix composite brazing self-brazing filler metal is from 18% to 22% Cu, 5% to 8% by mass percentage %Si, 1.0%~1.8%Mg, 0.06%~0.08%Bi, 0.015%~0.025%La, 0.6%~0.8%Li and the balance Al.

specific Embodiment approach 3

[0015] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the composition of high volume fraction particle reinforced aluminum matrix composite material brazing self-brazing filler metal is composed of 20% Cu, 6% Si, 1.5% Mg by mass percentage , 0.07% Bi, 0.02% La, 0.7% Li and 71.71% Al.

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Abstract

The invention discloses a high volume fraction grain enhanced aluminum-base compound material brazing filler metal and a preparation method thereof, relating to a grain enhanced aluminum-base compound material brazing filler metal and the preparation method thereof. The invention solves the problems of inferior solderability of high volume fraction grain enhanced aluminum-base compound material, inferior temperature resistance and corrosion resistance of brazing seam acquired by using the prior welding technique. The brazing filler metal of the invention is foil-shaped, made of Cu, Si, Mg, Bi, La, Li and Al. The method of the invention comprises the steps of: weighting raw materials, making the materials into an alloy pole, making quenched foil-shaped fiber material, and annealing. The brazing filler metal prepared by the invention has the advantages of excellent solderability and the brazing seam has temperature resistance and corrosion resistance.

Description

technical field [0001] The invention relates to a particle-reinforced aluminum-based composite material brazing self-brazing filler material and a preparation method thereof. Background technique [0002] High volume fraction particle reinforced aluminum matrix composites have important application prospects in the manufacture of precision components of aerospace photoelectric control systems and microelectronic packaging devices due to their excellent properties such as low thermal expansion coefficient, high thermal conductivity and low density. However, due to the large volume percentage of the ceramic reinforcement phase (generally greater than 50%), the wettability of the material is very poor, making the brazing of this material very difficult. [0003] At present, the brazing of common low volume fraction (generally less than 20%) particle reinforced aluminum matrix composites basically follows the brazing of aluminum alloys or the surface of which is metallized befor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40
Inventor 牛济泰罗相尉卢广玺关绍康郭永良张杰孟庆昌线恒泽于杰
Owner HARBIN INST OF TECH
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