Adhesive system for brazing flux, coating composition for brazing filler metal and flux coated brazing rod

A technology of composition and brazing flux, applied in the direction of welding/cutting media/materials, metal processing equipment, welding equipment, etc., can solve the problems of affecting the quality of brazing, peeling off of the coating, and many residues, etc., and achieve good moisture resistance and anti-shedding Effect, moisture-proof coating, and low organic matter content

Active Publication Date: 2017-01-04
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the brazing flux is adhered to the inner core of the brazing material through a binder, and the coating is easy to peel off due to moisture absorption; and the inorganic binder has a lot of residue after burning, which will cause adverse effects on the brazing process. Affect brazing quality

Method used

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  • Adhesive system for brazing flux, coating composition for brazing filler metal and flux coated brazing rod
  • Adhesive system for brazing flux, coating composition for brazing filler metal and flux coated brazing rod
  • Adhesive system for brazing flux, coating composition for brazing filler metal and flux coated brazing rod

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Embodiment 1

[0038] The solder bonding system of the present embodiment includes a main agent and a curing agent; the main agent is composed of the following components by weight: 20 parts of epoxy resin, 18 parts of polysulfide rubber, and 10 parts of dibutyl phthalate , 7 parts of diluent; curing agent is composed of the following components in mass percentage: 70% of diethylenetriamine, 30% of phthalic anhydride.

[0039] The coating composition for brazing filler metal of the present embodiment comprises coating main agent and curing agent; The coating main agent is made up of the component of following mass percentage: brazing flux 45%, epoxy resin 20%, polysulfide rubber 18%, Dibutyl phthalate 10%, diluent 7%; The diluent is acetone. The curing agent is composed of the following components in mass percentage: 70% of diethylenetriamine and 30% of phthalic anhydride. The brazing flux is composed of the following components in mass percentage: 45% of potassium fluoride, 22% of potassiu...

Embodiment 2

[0045] The bonding system for flux of the present embodiment includes a main agent and a curing agent; the main agent is composed of the following components by weight: 20 parts of epoxy resin, 20 parts of polysulfide rubber, and 7 parts of dibutyl phthalate , 3 parts of diluent; Said diluent is acetone. The curing agent is composed of the following components in mass percentage: 80% of diethylenetriamine and 20% of phthalic anhydride.

[0046] The coating composition for brazing filler metal of the present embodiment comprises coating main agent and curing agent; The coating main agent is made up of the component of following mass percentage: brazing flux 50%, epoxy resin 20%, polysulfide rubber 20%, Dibutyl phthalate 7%, Thinner 3%.

[0047] The curing agent is composed of the following components in mass percentage: 70% of diethylenetriamine and 30% of phthalic anhydride. The brazing flux is composed of the following components in mass percentage: 70% of boric anhydride, ...

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Abstract

The invention relates to an adhesive system for brazing flux, a coating composition for brazing filler metal and a flux coated brazing rod, and belongs to the field of flux coated brazing rods. The adhesive system for the brazing flux comprises a main agent and a curing agent; the main agent is composed of, by weight, 18-23 parts of epoxy resin, 15-20 parts of polysulfide rubber, 7-14 parts of dibutyl phthalate and 3-8 parts of diluent; the curing agent is composed of, by weight, 70%-80% of diethylenetriamine and 20%-30% of phthalic anhydride. The adhesive system for the brazing flux is composed of epoxy resin and polysulfide rubber and can be used on the brazing filler metal surface for preparing dampproof and anti-drop coating after adding and mixing brazing flux evenly. The coating can be adhered to the inner core of brazing filler metal well and good in dampproof and anti-drop effect; the flux coated brazing rod cured and prepared by the coating composition is low in organic content, capable of decomposing under the brazing temperature, less in residues and small in influence on brazing.

Description

technical field [0001] The invention belongs to the field of coated solder, and in particular relates to a bonding system for solder, a coating composition for solder and coated solder. Background technique [0002] Flux is the flux used in the brazing process, used in conjunction with brazing material, is an important substance to ensure the smooth progress of the brazing process and obtain a dense joint. The role of the brazing flux is to remove oxides on the surface of the molten solder and the base metal, protect the surface of the solder and the base metal from oxidation, improve the wettability of the solder to the wood, promote the activation of the interface, and make the brazing process go smoothly. Flux and solder and reasonable selection play a key role in the quality of brazed joints. [0003] In the traditional brazing process, brazing material and flux are used separately and in combination. To ensure the quality of brazing, excessive flux is often added, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365B23K35/30B23K35/40
CPCB23K35/0227B23K35/3006B23K35/302B23K35/3605B23K35/3606B23K35/3613B23K35/365B23K35/404
Inventor 赵辰丰张青科孙华为陈宝玉薛行雁董显吕登峰陈静黄俊兰董博文
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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