Non-corrosive solder for soldering stainless iron and aluminium
A technology of aluminum brazing and stainless iron, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problem of low qualified rate of brazing
Inactive Publication Date: 2002-02-27
GUANGZHOU RES INST OF NON FERROUS METALS
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- Abstract
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AI Technical Summary
Problems solved by technology
The qualified rate of brazing is very low, only about 60%, it is impossible to be used for industrial production in this industry
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0010] According to weight percentage, take 95.0% of potassium fluoroaluminate eutectic, 3.00% of zinc fluoride, 0.5% of copper fluoride, and 1.5% of tin fluoride, and then ball mill to 200 mesh in a ball mill after mixing. The measured ultimate tensile strength is 29N / mm 2 .
Embodiment 2
[0012] The same as in Example 1. Take 95.0% of potassium fluoroaluminate eutectic, 4.0% of zinc fluoride, 0.2% of copper fluoride, and 0.8% of tin fluoride. The measured ultimate tensile strength is 32N / mm 2 .
Embodiment 3
[0014] The same as in Example 1. Take 97.5% of potassium fluoroaluminate eutectic, 1.2% of zinc fluoride, 0.4% of copper fluoride, 0.6% of tin fluoride, and 0.3% of cadmium fluoride. The measured ultimate tensile strength is 48N / mm 2 .
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Abstract
Description
Technical field [0001] The invention relates to a flux for brazing of metals, in particular to a non-corrosive flux for brazing of different metals. Background technique [0002] The fluxes for stainless steel-aluminum brazing currently available on the market are potassium tetrafluoroaluminate + potassium hexafluoroaluminate (KAlF) 4+ K 3 AlF 6 ) Eutectic, successfully used for stainless steel-aluminum composite brazing, and the brazing qualification rate is greater than 99.9%. However, this flux is not suitable for stainless iron-aluminum welding. Taking potassium fluoroaluminate eutectic solder and silicon-aluminum eutectic solder as examples, the tensile strength of the stainless iron-aluminum welded is relatively low. The qualified rate of brazing is very low, only about 60%, and it is impossible to be used in industrial production in this industry. Summary of the invention [0003] The object of the present invention is to provide a non-corrosive flux for stainless iron-al...
Claims
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Inventor 陈志祥曾燕蔡志红蔡沛沛黄齐博
Owner GUANGZHOU RES INST OF NON FERROUS METALS