Preparation method of Al-Si-Zn rapidly-cooled solder for aluminum alloy/stainless steel brazing

An al-si-zn, stainless steel technology, applied in welding equipment, metal processing equipment, welding/cutting media/materials, etc., can solve the problems of poor wetting of stainless steel by brazing filler metals, and achieve easy welding, improved efficiency, and reduced costs Effect

Inactive Publication Date: 2012-06-20
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by this invention is to provide a kind of preparation method of Al-Si-Zn quenching brazing filler metal suitable for welding between aluminum alloy and stainless steel, solve the problem that brazing filler metal wetting stainless steel is poor, to further improve the brazing filler metal's wetting Moisture, mechanical properties, reduce the melting point of solder

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0013] The embodiment of the present invention is specifically illustrated in conjunction with the examples: the preparation method of Al-Si-Zn quenching solder for aluminum alloy / stainless steel brazing, adopting zinc powder and composition to be aluminum, silicon, iron, copper and magnesium solder foil as Raw materials, the percentages of aluminum, silicon, iron, copper and magnesium in the total weight of the raw materials in the solder foil are: aluminum 78.8-87.7%, silicon 11-13%, iron 0.6-0.8%, copper 0.3-0.4%, magnesium 0.1- 0.2%, the percentage of zinc powder in the total weight of raw materials is: 0.1-7%; the preparation steps are:

[0014] (1) Add solder foil and zinc powder consisting of aluminum, silicon, iron, copper and magnesium into the vacuum non-consumable electric arc furnace according to the above ratio, and evacuate the furnace to a vacuum degree of 4×10 -2 Pa, and then rush into the furnace with argon with a pressure of 0.02MPa as a protective gas;

[0...

Embodiment 1

[0023] The preparation method of Al-Si-Zn quenching filler metal for aluminum alloy / stainless steel brazing uses zinc powder and the brazing filler metal foil that composition is aluminum, silicon, iron, copper and magnesium as raw material, and aluminum, silicon, iron in the brazing filler metal foil , the percentage of copper and magnesium accounting for the total weight of raw materials is: aluminum 78.8%, silicon 13%, iron 0.7%, copper 0.35%, magnesium 0.15%, the percentage of zinc powder accounting for the total weight of raw materials is: 7%; the preparation steps are:

[0024] (1) Add solder foil and zinc powder consisting of aluminum, silicon, iron, copper and magnesium into the vacuum non-consumable electric arc furnace according to the above ratio, and evacuate the furnace to a vacuum degree of 4×10 -2 Pa, and then rush into the furnace with argon with a pressure of 0.02MPa as a protective gas;

[0025] (2) Turn on the power of the electric arc furnace and inject an ...

Embodiment 2

[0030] The preparation method of Al-Si-Zn quenching filler metal for aluminum alloy / stainless steel brazing uses zinc powder and the brazing filler metal foil that composition is aluminum, silicon, iron, copper and magnesium as raw material, and aluminum, silicon, iron in the brazing filler metal foil , the percentage of copper and magnesium accounting for the gross weight of raw materials is: aluminum 84.8%, silicon 12%, iron 0.6%, copper 0.4%, magnesium 0.2%, the percentage of zinc powder accounting for the gross weight of raw materials is: 2%; the preparation steps are:

[0031] (1) Add solder foil and zinc powder consisting of aluminum, silicon, iron, copper and magnesium into the vacuum non-consumable electric arc furnace according to the above ratio, and evacuate the furnace to a vacuum degree of 4×10 -2 Pa, and then rush into the furnace with argon with a pressure of 0.02MPa as a protective gas;

[0032] (2) Turn on the power of the electric arc furnace and inject an arc ...

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Abstract

The invention relates to a preparation method of an Al-Si-Zn rapidly-cooled solder for aluminum alloy/stainless steel brazing. Zinc powder and solder foil containing aluminum, silicon, iron, copper and magnesium are used as raw materials and are added into a vacuum non-consumable arc furnace, and argon is filled after vacuum pumping; a power supply is turned on, the raw materials are heated to 1400-1500 DEG C at a rate of 28 DEG C per second, the power supply is turned off, and the materials are cooled for 15 minutes; the molten raw materials are taken out, turned and fed into the arc furnace again to be molten once to twice; the cooled alloy block is taken out and ground after melting; and the alloy block is placed into a single-roller melt rapid-quenching device and heated to be molten, the molten alloy is sprayed onto a roller, a solder foil band with the width of 15mm and the thickness of 120Mum can be formed via band spinning, and thus the Al-Si-Zn rapidly-cooled solder is prepared. The prepared solder has good wetting performance, the wetting time for stainless steel can be reduced, and the stainless steel and aluminum can be wetted simultaneously, so that solid joints can be formed between the stainless steel and the aluminum.

Description

technical field [0001] The invention relates to a solder used for brazing of different materials, in particular to a preparation method of Al-Si-Zn quenching solder for aluminum alloy / stainless steel brazing. Background technique [0002] In recent years, with the acceleration of the process of energy saving and environmental protection and the lightweight trend of various mechanical parts in the automotive and industrial fields, the technology of preparing composite parts with light weight, corrosion resistance, heat resistance and high strength has become increasingly important; [0003] Aluminum alloy is the preferred material for lightweight, but its heat resistance and strength are slightly lacking, and stainless steel can make up for this defect. Therefore, the development and research of aluminum alloy and stainless steel connection technology has become an urgent problem to be solved. As far as the connection method is concerned, the brazing method is a more suitabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/40B23K35/28
Inventor 刘树英张垒张鑫闫焉服曹聪聪鈴村暁男
Owner HENAN UNIV OF SCI & TECH
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