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2021-11-12
The basic principle is to have as little contact with the air as possible, the less the better. After the welding paste and air contact for a long time, it will cause the oxidation of the welding paste and the proportion of the flux. The result is that the solder paste appears hard, hard, refractory and produces a large number of tin balls.
2021-11-12
Lead-free solder flux for stainless steel soldering
There are more complex oxides on the surface of stainless steel, and in addition to Fe oxides, they also contain oxides of Cr, Ni, Mn, Ti, Mo, W and V. Chromium oxide is a relatively stable oxide, which is difficult to remove, and a strong active flux must be used. And stainless steel containing Ti, its oxide is more stable, more difficult to remove. In order to ensure that the performance of the brazing head meets the requirements, a strong active flux is usually used in the brazing process to completely remove the metal oxide film such as chromium oxide on the surface to be welded. The stainless steel flux can react with the oxide film on the metal surface at a certain temperature, so that the surface of the welded material is integrated with the liquid solder, so as to achieve the joint between the metal and the metal. This tin welding technology has been widely used in various types of stainless steel manufacturing.
2021-11-09
The use and precautions of aluminum flux
It has excellent welding performance for aluminum and aluminum alloy, can quickly remove the oxide layer on the surface of aluminum and aluminum alloy, and the solder joint is full, bright and firm. It can be used for low temperature brazing of aluminum and aluminum alloy materials with lead-free solder and tin-lead solder.
2021-11-09
Function and selection of flux
The matrix is the main component of the flux, which controls the melting point of the flux, which is covered on the surface of the solder joint after melting, and plays the role of isolating air, at the same time, it is the solvent of other functional components.
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