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Nickel soldering paste for automatic brazing

A brazing and soldering paste technology, applied in the field of automatic brazing paste composition, can solve the problems of affecting the appearance, high temperature strength, poor corrosion resistance, unable to meet the use requirements of electric heating appliances, etc., so as to improve fluidity and increase surface bonding. force effect

Inactive Publication Date: 2008-12-17
GUANGZHOU RES INST OF NON FERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-temperature strength and corrosion resistance of the workpiece welded by red copper solder paste and silver solder paste are poor, which cannot meet the requirements of electric heating appliances. In addition, because the color of red copper is completely different from stainless steel, it affects the appearance, and silver solder paste is expensive. Therefore, the application of red copper solder paste and silver solder paste in the electric heating appliance industry is limited to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Brazing material: Cr 15%, P 10%, Fe 0.5%, Si 0.1%, C 0.08%, B 0.2%, the balance Ni. Paste (accounting for 6.5% of the total weight of the solder paste): polybutene with a molecular weight of 300, polyisobutylene with a molecular weight of 450 and 2400, 30% each, nonylphenol polyoxyethylene (10) ether 8.2%, tallow 1.8%.

Embodiment 2

[0023] Brazing filler metal: Cr 13%, P 10.5%, Fe 0.4%, Si 0.2%, C 0.08%, B 1.02%, the balance Ni. Paste (accounting for 7.35% of the total weight of the solder paste): polybutene with a molecular weight of 250 accounts for 20%, polyisobutylene with a molecular weight of 220 accounts for 20%, and polyisobutylene with a molecular weight of 7000 accounts for 38%. 8-9 Alkylphenol polyoxyethylene (8) ether accounts for 5%, sorbitan monopalmitate accounts for 6%, and palm oil accounts for 11%.

Embodiment 3

[0025] Brazing material: Cr 14%, B 3.5%, Si 4.5%, Fe 4.0%, C 0.06%, the balance Ni; forming paste (accounting for 7.5% of the total weight of the solder paste): polyvinyl acetate with a molecular weight of 20000 6.63%, 2.55% polyisobutylene with a molecular weight of 10,000, 1.02% polyvinylpyrrolidone with a molecular weight of 80,000, 73.2% kerosene, 1.9% sorbitan monolaurate, 2.0% sorbitan monooleate, 6.7% tallow, Olive oil 6.0%.

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Abstract

The invention relates to a nickel covered welding paste for automatic braze welding. It comprises following components with percent by weight: solder 91.50-96.5% and paste-forming material 3.50-8.50%, and solder concludes: Cr 5-20%, Fe 0.2-5%, C 0.01-0.1%, Si 0.1-5% and left is Ni. The paste-forming material comprises following components with percent by weight: mixture of polybutene and polyisobutene with molecular weight being 200-9000, 72-92%, or one or several objects among polyvinyl acetate, polyvinyl pyrrolidon, and polyisobutene, polypentene with molecular weight being 10000-100000 6.5-45%, organic solvent 50-80%, surface activator 1.0-12.0% and lubricant 1.0-18.0%. The said nickel covered welding paste is the solder paste that is characterized by good fire resistant and corrosion resistant property and used for stainless steel.

Description

technical field [0001] The invention relates to an automatic brazing material, in particular to a composition of automatic brazing paste. Background technique [0002] A cream brazing material—solder paste, which is characterized in that it can be quantitatively applied to the parts to be welded by pneumatic extrusion, which meets the requirements for fast and accurate feeding in the automatic brazing production process, thereby Realize the brazing of multiple parts at the same time. There are often more than 6 parts to be brazed on a workpiece, and the production efficiency of automatic brazing is dozens of times higher than that of manual operation, which can greatly improve production efficiency and stabilize product quality. In addition, the realization of brazing production automation greatly reduces the impact of exhaust gas on the health of operators during the brazing process, making production more environmentally friendly and hygienic. [0003] Copper solder past...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/365
Inventor 杨凯珍曾燕陈志祥刘宏江刘凤美陈平蔡志红蔡沛沛刘福平周美霞黄云帅钟文晨黄健敏张碧波黄永达
Owner GUANGZHOU RES INST OF NON FERROUS METALS
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