Effect of different silver-based brazing filler metals on brazing quality of copper tube
Release time:
2022-11-19
【Summary Description】 Pure copper is widely used in heat exchange equipment and refrigeration pipes because of its good thermal conductivity, ductility and corrosion resistance. However, due to the high thermal conductivity and high linear expansion coefficient of copper, incomplete penetration and cracks are likely to occur in fusion welding. Compared with the effect of melting different silver-based solder on the quality of copper pipe brazing welding, brazing is widely used in the connection of copper pipe joints because the base metal does not melt, reduces the residual stress of the joint and avoids the formation of the above defects. The flame brazing process of copper tubes in different industries has been widely studied. The processing conditions of copper pipe in air-conditioning manufacturing industry are analyzed, and the application of flame brazing process in air-conditioning pipe processing is studied. The brazing connection technology of gas copper pipe is studied. According to the characteristics of the heat exchanger industry, measures to improve the copper tube brazing process are proposed. An important aspect that affects the quality of brazing is the choice of brazing filler metal. Silver-based solder is a kind of medium temperature solder widely used in production. It has a low melting temperature and good wettability. The resulting brazed joint has high strength and good plasticity, and can be brazed with most metals except aluminum and magnesium. However, silver is a precious metal. In order to reduce the cost, it is of great significance to correctly select and reasonably use silver-lead materials.
Pure copper is widely used in heat exchange equipment and refrigeration pipes because of its good thermal conductivity, ductility and corrosion resistance.
However, due to the high thermal conductivity and high linear expansion coefficient of copper, incomplete penetration and cracks are likely to occur in fusion welding. Compared with the effect of melting different silver-based solder on the quality of copper pipe brazing welding, brazing is widely used in the connection of copper pipe joints because the base metal does not melt, reduces the residual stress of the joint and avoids the formation of the above defects.
The flame brazing process of copper tubes in different industries has been widely studied.
The processing conditions of copper pipe in air-conditioning manufacturing industry are analyzed, and the application of flame brazing process in air-conditioning pipe processing is studied. The brazing connection technology of gas copper pipe is studied. According to the characteristics of the heat exchanger industry, measures to improve the copper tube brazing process are proposed. An important aspect that affects the quality of brazing is the choice of brazing filler metal. Silver-based solder is a kind of medium temperature solder widely used in production.
It has a low melting temperature and good wettability. The resulting brazed joint has high strength and good plasticity, and can be brazed with most metals except aluminum and magnesium. However, silver is a precious metal. In order to reduce the cost, it is of great significance to correctly select and reasonably use silver-lead materials.
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