Copper-based flux-cored solder wire with easy preparation, strong wettability and high braze joint strength

A technology with high wettability and high strength, applied in welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of decreased toughness, poor wettability, poor fluidity of solder, etc., to increase fluidity and enhance wetting sexual, mobility-promoting effects
CN113245746BActive Publication Date: 2022-06-24ZHENGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHENGZHOU UNIV
Publication Date
2022-06-24

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Abstract

The invention belongs to the field of welding materials, in particular to a copper-based flux-cored brazing material wire which is easy to prepare, has strong wettability and high brazing seam strength, and comprises outer skin and flux-core powder; the flux-core powder contains nano-hexagonal boron nitride 5%-8 %, nano zinc carbonate 8%-12%, zinc phosphide 16%-20%, borax 25%, boric acid 18%, potassium fluoride 7%, the balance is tin powder; the outer skin contains silver 8%-12%, indium 1.2%-2.5%, antimony 1.5%-2.2%, and the balance is copper; the quality of the core powder accounts for 25%-32% of the total mass of the core solder wire. There is no brittle phase in the outer skin of the present invention, and there is nano-hexagonal boron nitride with strong lubricity in the drug core powder, which is uninterrupted in the drawing process and easy to prepare. The stirring effect of the carbon dioxide escape can enhance the wettability of the solder, and the nano-hexagonal boron nitride and the decomposed nano-zinc oxide can effectively improve the strength of the brazing seam, and no flux is needed during brazing.
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Description

technical field

[0001] The invention belongs to the technical field of welding materials, in particular to a copper-based flux-cored solder wire with easy preparation, strong wettability and high brazing seam strength. Background technique

[0002] With the development of modern industrial technology, especially the development of aerospace, automobile, microelectronics and other industrial technologies, brazing technology has been widely used with its unique advantages and has become one of the most active and promising fields. The brazing filler metal is also in great demand as a welding material for brazing. Copper-based brazing filler metals are widely used in refrigeration, electromechanical, tools, automobiles, exploration, tunneling and other industries, and are used for brazing copper and copper alloys and other metal materials.

[0003] There are two commonly used copper-based solder wires: one is solid solder wire, and the other is flux-cored solder wire. [0004...

Claims

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