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What does brazing mean and what are the precautions for copper brazing-Kehua

by:Kehua     2022-07-25
Welding technology is used in various projects. At present, the more advanced technology is brazing, and traditional electric welding has been gradually replaced by brazing. Next, Kehua will take you to understand what brazing means and what are the precautions for copper brazing? After reaching the melting temperature of the solder, the liquid solder is used to fill the gap of the solid workpiece to connect the metals. When brazing, the oxide film and oil stains on the contact surface of the base metal should be removed first, so that the capillary can play a role after the solder is melted and increase the wettability and capillary fluidity of the solder. According to the different melting points of the solder, brazing is divided into brazing and soldering. The brazing deformation is small, the joints are smooth and beautiful, and it is suitable for welding precision, complex and components composed of different materials, such as honeycomb structure plates, turbine blades, carbide cutting tools and printed circuit boards. Kehua believes that the workpiece must be carefully processed and strictly cleaned before brazing to remove oil stains and excessively thick oxide film to ensure the interface assembly gap. The gap is generally required to be between 0.01 and 0.1 mm. Copper brazing What are the precautions for copper brazing? 1. When welding, avoid the flame being aimed at a certain point for a long time and the welding temperature should not exceed 550 °C to avoid burning the base metal. 2. Protective clothing, protective gloves and protective glasses (or protective face shield) should be worn for brazing work to prevent the liquid flux from splashing on the skin and causing burns. 3. No further treatment is required after cooling, the flux residue is visible but non-corrosive, does not absorb moisture and adheres firmly. If necessary, it is recommended to use physical methods to remove, such as using a metal brush to remove after soaking (if there is a small burr, it can be polished with fine sandpaper). Brazing is the most widely used welding technology at present. When brazing copper, you must observe the above precautions, otherwise it is easy to be dangerous.
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