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Yellow brass brazing filler metal alloy

A brass brazing filler metal and alloy technology, applied in metal processing equipment, welding/cutting media/materials, welding media, etc., can solve the problems of copper annealing, strength index reduction, excessive grain growth, etc., to reduce costs, Low cost, high activity effect

Inactive Publication Date: 2017-05-10
ANHUI HUAZHONG WELDING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inherent brittleness and microcracks of Fe-Si and Fe-P intermetallic compounds, the reliability of the brazing joint service process (such as: air tightness, electrical conductivity and mechanical properties) will be reduced.
Secondly, due to the high melting point of the existing brass solder, when brazing similar steel / copper joints, the annealing of copper is severe, causing excessive growth of grains, resulting in a decrease in strength indicators

Method used

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  • Yellow brass brazing filler metal alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A brass solder alloy, calculated by weight percentage, is made of the following raw materials:

[0026] Copper 53%, tin 0.3%, bismuth 3%, titanium 0.5%, germanium 0.05%, and the balance is zinc.

[0027] Preparation:

[0028] 1) Prepare a total of 5000 grams of each material according to the above formula;

[0029] 2) Put Cu into an induction furnace and heat it to above 1100°C and melt it;

[0030] 3) Add Zn and stir fully, while rapidly reducing the temperature of the molten metal to 920°C;

[0031] 4) After the molten metal is uniform, add Bi and stir thoroughly;

[0032] 5) Add Sn, Ti and Ge and stir evenly, then cast;

[0033] 6) The brazing alloy is obtained by extruding and wire drawing according to the conventional brazing filler metal processing method.

Embodiment 2

[0035] A brass solder alloy, calculated by weight percentage, is made of the following raw materials:

[0036] 50% copper, 0.4% tin, 5% bismuth, 1% titanium, 0.06% germanium, and the balance is zinc.

[0037] The preparation method of the brass solder alloy in this embodiment is consistent with the method described in embodiment 1, the only difference is that the weight percentages of the components of the brass solder alloy are weighed according to the proportions in this embodiment.

Embodiment 3

[0039] A brass solder alloy, calculated by weight percentage, is made of the following raw materials:

[0040] Copper 55%, tin 0.2%, bismuth 2%, titanium 0.1%, germanium 0.02%, and the balance is zinc.

[0041] The preparation method of the brass solder alloy in this embodiment is consistent with the method described in embodiment 1, the only difference is that the weight percentages of the components of the brass solder alloy are weighed according to the proportions in this embodiment.

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Abstract

The invention provides a yellow brass brazing filler metal alloy. The alloy is prepared from, by weight, 50-55% of copper, 0.2-0.4% of tin, 2-5% of bismuth, 0.1-1% of titanium and 0.02-0.06% of germanium, and the balance being zinc. The yellow brass brazing filler metal alloy does not contain silver and cadmium, but is capable of lowering the melting point of traditional yellow brass brazing filler metal, and has the advantages of high reactivity and low cost.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a brass solder alloy. Background technique [0002] The materials used in the hardware tool industry mainly include hard alloys, diamonds, and iron bodies. The workpieces of these materials are mostly brass-type solders when welding. Due to the high melting point of brass, it is not conducive to the welding of workpieces. Since the addition of silver can effectively reduce the melting point of the brass solder and effectively improve the brazing fluidity of the brass solder, in the prior art, most brazing filler metals of the brass matrix contain silver. The addition of silver can reduce the melting point of brass solder, and the most commonly used silver content in silver brass solder is 2%, 5%, 10%, 15%, 20%, 30%, 35%, 40%, 45%, 50%, etc., but because silver is a precious metal, its price is higher, so adding silver to the brass solder increases the cost...

Claims

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Application Information

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IPC IPC(8): B23K35/30
CPCB23K35/302
Inventor 曹立兵
Owner ANHUI HUAZHONG WELDING MATERIAL CO LTD
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