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High-strength and high-toughness composite silver solder ring for in-situ synthesis of soldering flux

A technology of in-situ synthesis and silver solder, which is applied in the direction of welding/cutting medium/material, welding equipment, welding medium, etc., which can solve the problem of difficulty in making solder rings, affecting the popularization and application of flux-cored solder, poor strength and toughness, etc. Problems, achieve good brazing process, improve flow spreadability, and improve processing performance

Active Publication Date: 2015-12-09
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

At present, the diameter of common flux-cored silver welding rods on the market is generally 1.5-3mm, and the proportion of flux cores is mostly 12%-20%. Due to the thinner wall thickness of the solder tube, the strength and The toughness is poor, and it is difficult to make solder rings for welding thin-walled pipelines with a diameter below 6mm, which affects the popularization and application of flux-cored solder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The high-strength and tough composite silver solder ring for in-situ synthetic flux of the present invention comprises a three-ring ring silver solder ring body with a hollow structure, and the silver solder ring body is composed of a silver solder tube and a flux core filled therein It is made of composite silver solder; the drug core is composed of 13% boron powder with an average particle size of 0.002mm, 12% sodium borohydride, 23% potassium fluoroborate, 21% boric anhydride, and 31% potassium fluoride; The brazing material tube is rolled from BAg34Cu36Zn27.5Sn2.5 strip-shaped silver solder (thickness 0.3mm, width 7.8mm) obtained by melting, pouring and rolling silver, copper, zinc and tin in proportion. During the rolling process, the The core is added to it, rolled and drawn into a composite silver solder with a diameter of 1.5mm; then wound into a composite silver solder ring with a middle diameter of 13mm, which can be used for welding steel-steel, copper - Pipe...

Embodiment 2

[0024] The high-strength and tough composite silver solder ring for in-situ synthetic flux of the present invention comprises a three-ring ring silver solder ring body with a hollow structure, and the silver solder ring body is composed of a silver solder tube and a flux core filled therein Composite silver solder is wound; the flux core components are the same as in Example 1, and the silver solder tube is BAg50Cu34Zn16 solder. After being rolled and drawn into a composite silver solder with a diameter of 0.8mm, it is wound into a composite silver solder ring with a middle diameter of 4mm, which can be used for welding steel-steel, copper-steel and other pipeline joints.

Embodiment 3

[0026] The high-strength and tough composite silver solder ring for in-situ synthetic flux of the present invention comprises a single-ring silver solder ring body with a hollow structure, and the silver solder ring body is composed of a silver solder tube and a flux core filled therein Composite silver brazing material is wound; the flux core component and silver brazing material tube component are all the same as in Example 1, and the composite silver brazing material ring made by winding has a median diameter of 12mm, which can be used for welding steel-steel, copper- Steel and other pipe joints.

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Abstract

The invention discloses a high-strength and high-toughness composite silver solder ring for in-situ synthesis of soldering flux. The high-strength and high-toughness composite silver solder ring comprises a silver solder ring body of a hollow structure. The silver solder ring body is formed by winding composite silver solder formed by a silver solder pipe and a flux core with which the silver solder pipe is filled. The flux core is prepared from boron micro-powder, sodium borohydride or potassium borohydride, potassium fluoborate, boric anhydride or boric acid, potassium fluoride or sodium fluoride or lithium fluoride, potassium bifluoride and potassium fluoroaluminate according to a certain proportion. The purpose of in-situ synthesis of the soldering flux through the boron micro-powder in the flux core and metal elements in the silver solder pipe is achieved, so that the content of the flux core is reduced, and when the content of the flux core is low, the solder still achieves good brazing manufacturability; meanwhile, due to the fact that the wall thickness of the solder pipe is increased, good toughness and high stiffness are achieved, the processing performance of the solder is greatly improved, the minimum diameter can be reduced to 0.8 mm, the solder can be easily wound into the solder ring with the intermediate diameter below 6 mm, and application and popularization of the automatic brazing process are facilitated.

Description

technical field [0001] The invention relates to welding materials, in particular to a high-strength and tough composite silver brazing filler metal ring for in-situ synthesis of flux. Background technique [0002] Silver solder has a moderate melting point, good welding processability, good strength, toughness, electrical conductivity, thermal conductivity and corrosion resistance, and is the most widely used type of hard solder. [0003] With the development of high-frequency induction welding machines, the application of induction brazing technology in pipeline connection has been developed by leaps and bounds. Induction brazing is easy to operate, heats relatively uniformly, is economical, and does not require heating the entire part. Induction heating allows rapid localized heating to join high-strength components with minimal loss of strength. In order to save solder and produce uniform joints and control the amount of solder used, ring-shaped solder is used more and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368B23K35/30B23K35/40
CPCB23K35/302B23K35/368B23K35/40
Inventor 龙飞赵辰丰于学宗轩庆庆
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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