Common brazing process problems
Release time:
2023-01-06
【Summary Description】 With the continuous development of industry, brazing is involved in various industries, and its role is also increasing. Although it is used more and more frequently, in the process of using it, it is still found that there are many common sense errors, including many operators are not very clear. Here, let's make a simple summary of the most common problem: 1. What is the difference between brazing, soldering and welding? Brazing-According to the definition of the American Welding Association, the process of melting and filling the brazing seam by heating to above 450 ℃ (higher than the liquid phase point temperature of the brazing filler metal and lower than the solid phase point temperature of the base metal) to form a reliable connection of materials. Soldering-soldering has a similar definition to brazing, except that the brazing heating temperature is lower than 450°C (higher than the liquid phase point temperature of the brazing filler metal and lower than the solid phase point temperature of the base metal). Fusion welding-in the fusion welding process is the base metal and filler material are heated and melted, solidified after the formation of the connection. 2. What are the forms of solder? The form of the solder is mainly wire, tape, powder, paste, etc., which is mainly determined by the selected metal composition. Of course, many brazing materials can also be used for preform processing according to customer needs. 3. What is the form of flux? According to the type of flux mainly provide paste, slurry, liquid and powder flux. And these high-quality fluxes, such as the products of the world's number one brazing company Lukos, are all water-based. Such fluxes are more environmentally friendly and can reduce pollution to the furnace. I believe it is also the direction of flux development in the future. 4. How to remove the flux remaining after welding? The simplest way to remove the residual flux after welding is to quench the solder in hot water after solidification of the joint. For flux residues that are difficult to remove, 25% HCl solution is required for cleaning. Of course, we can also mix special cleaning agents according to our specific needs.
With the continuous development of industry, brazing is involved in various industries, and its role is also increasing. Although it is used more and more frequently, in the process of using it, it is still found that there are many common sense errors, including many operators are not very clear. Here, let's make a simple summary of the most common problem:
1. What is the difference between brazing, soldering and welding?
Brazing-According to the definition of the American Welding Association, the process of melting and filling the brazing seam by heating to above 450 ℃ (higher than the liquid phase point temperature of the brazing filler metal and lower than the solid phase point temperature of the base metal) to form a reliable connection of materials.
Soldering-soldering has a similar definition to brazing, except that the brazing heating temperature is lower than 450°C (higher than the liquid phase point temperature of the brazing filler metal and lower than the solid phase point temperature of the base metal).
Fusion welding-in the fusion welding process is the base metal and filler material are heated and melted, solidified after the formation of the connection.
2. What are the forms of solder?
The form of the solder is mainly wire, tape, powder, paste, etc., which is mainly determined by the selected metal composition. Of course, many brazing materials can also be used for preform processing according to customer needs.
3. What is the form of flux?
According to the type of flux mainly provide paste, slurry, liquid and powder flux. And these high-quality fluxes, such as the products of the world's number one brazing company Lukos, are all water-based. Such fluxes are more environmentally friendly and can reduce pollution to the furnace. I believe it is also the direction of flux development in the future.
4. How to remove the flux remaining after welding?
The simplest way to remove the residual flux after welding is to quench the solder in hot water after solidification of the joint. For flux residues that are difficult to remove, 25% HCl solution is required for cleaning. Of course, we can also mix special cleaning agents according to our specific needs.
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