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Silver-free brass soldering flux

A technology of brass solder, raw material, applied in welding/cutting medium/material, welding medium, welding equipment, etc., can solve problems such as micro-cracks

Inactive Publication Date: 2017-08-18
ANHUI HUAZHONG WELDING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a silver-free brass solder, which can not only reduce the melting point of traditional brass solder, but also solve the problem of microcracks caused by adding Si

Method used

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  • Silver-free brass soldering flux
  • Silver-free brass soldering flux

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A silver-free brass solder, calculated by weight percentage, comprising the following raw materials:

[0029] Copper 55%, tin 1%, bismuth 1.2%, silicon 0.28%, indium 0.12%, and germanium 0.04%, the balance is zinc.

[0030] Preparation:

[0031] 1) Prepare a total of 5000 grams of each material according to the above formula;

[0032] 2) Put Si into an induction furnace and heat it to above 1500°C and melt it;

[0033] 3) Then cool down to 1100°C and add Cu;

[0034] 4) Add Zn and stir fully, while rapidly reducing the temperature of the molten metal to 960°C;

[0035] 5) After the molten metal is uniform, add In and Ge and stir thoroughly;

[0036] 6) Add Sn and stir evenly, then cast;

[0037] 7) The brazing alloy is obtained by extruding and wire drawing according to the conventional brazing filler metal processing method.

Embodiment 2

[0039] A silver-free brass solder, calculated by weight percentage, comprising the following raw materials:

[0040] Copper 58%, tin 0.8%, bismuth 0.6%, silicon 0.16%, indium 0.02%, and germanium 0.02%, the balance is zinc.

[0041] The preparation method of the silver-free brass solder 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 silver-free brass solder are weighed according to the proportions in this embodiment.

Embodiment 3

[0043] A silver-free brass solder, calculated by weight percentage, comprising the following raw materials:

[0044] Copper 52%, tin 1%, bismuth 1.2%, silicon 0.15%, manganese 0.08%, and germanium 0.06%, the balance is zinc.

[0045] The preparation method of the silver-free brass solder 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 silver-free brass solder are weighed according to the proportions in this embodiment.

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Abstract

The invention proposes a silver-free brass solder, which is made of the following raw materials according to weight percentage: 52-58% copper, 0.8-1.2% tin, 0.6-1.8% bismuth, 0.16-0.36% silicon, 0.02-0.02% indium 0.2%, and germanium 0.02-0.06%, the balance is zinc. The silver-free brass solder can not only reduce the melting point of traditional brass solder, but also solve the problem of microcracks caused by adding Si.

Description

technical field [0001] The invention belongs to the technical field of soldering materials, and in particular relates to a silver-free brass solder. 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 silver-free brass solder and effectively improve the brazing fluidity of the brass solder, in the prior art, most brazing filler metals for brass substrates 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 sold...

Claims

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Application Information

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IPC IPC(8): B23K35/28
CPCB23K35/282
Inventor 曹立兵
Owner ANHUI HUAZHONG WELDING MATERIAL CO LTD
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