Preparation method for flux-cored electrode

Abstract

The invention relates to a preparation method for a flux-cored electrode. The method comprises the following steps of preparing a strip with a thickness of 0.1 to 0.5mm from silver solder containing 20 to 45 percent of silver, annealing and cleaning the strip, bending and deforming the strip to form a U-shaped strip with an upward opening by virtue of a roller, vibrating the silver solder to a conveyor belt from a funnel, conveying the silver solder to the U-shaped strip by virtue of the conveyor belt, rolling the U-shaped strip to form a flux-cored wire of an overlapped tubular structure by virtue of the roller, cleaning the surface of the flux-cored wire by virtue of a brush wheel and a brush, performing diameter reduction treatment, straightening the flux-cored wire in a low-temperature resistance heating or cold machining way, and cutting and forming the flux-cored wire, wherein the silver solder is placed in the transparent funnel, and is sufficient; the overlapped part of the flux-cored wire is 0.1 to 2mm wide. The method is simple and reasonable; a conventional soldering process is simplified, the quality of a soldered joint is improved, and the using cost of the solder is effectively lowered by over 30 percent.

Description

technical field [0001] The invention relates to a preparation method of a flux-cored electrode and a flux-cored electrode, in particular to a flux-cored electrode with a silver content of 20-45% and a preparation method thereof. The flux-cored electrode is especially suitable for flame welding and can be widely used It is a new type of hard brazing electrode used in brazing in refrigeration, machinery, electromechanical and other industries. Background technique [0002] Compared with brass solder, silver solder has a relatively lower brazing temperature, and at the same time, its basic mechanical properties are better than brass solder, with good electrical conductivity and longer service life of brazed joints. Type of hard solder. [0003] Generally, silver solder containing 20~45% silver can be used for the connection of copper and steel dissimilar metals. It has excellent performance after welding, but it must be combined with silver solder during brazing. Silver solder...

AI Technical Summary

Problems solved by technology

[0004] Although there are already flux-cored silver solders in the market, due to the poor deep processing performance of some silver solders, the processing difficulty is further increased after being prepared into flux cores.

Based on the above reasons, there is no flux-cored silver solder electrode with a silver content of 20-45% in the market at present, which affects the popularization and application of silver-containing solder with a silver content of 20-45%

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