Brazing
Brazing is the process of bonding two metals together using a brazing smelter. it is a process similar to hard soldering the main difference being the temperature with brazing is much hotter than soldering at around 450°C. Steel would need to be brazed because of its hardness.
To prepare for brazing your metal follow the same steps as I have described in the annealing process, before you heat up anything clean the surface of the metal you are joining can use glass paper for this, the cleaner the metal the better end result in brazing you will get.when you are ready to start heating the metal apply some Sif flux to the area you wish to join, this will bond the brazing smelter to the steel, in schools is Borax is more commonly used (the Brazing smelter is a rod with a brass colour to it). Heat up the metal and when it glows a fairly bright orange it is ready for you to add your smelter, heat the end of this up and if it into the flux, then hold thing onto the side of the area you are bonding. it is important that the metal is hot enough otherwise your smelter may not bond or it may not join smoothly. Unlike in annealing you are not meant to quench it afterwords as it can weaken the join.
Hard Soldering
This process is much the same as the brazing process but at a considerably lower temperature, the main principles and techniques remain the same however things such as the Flux, solder and temperature change. Easy-flow flux is commonly used, Silver solder replaces brazing smelter and the temperature is lower because of the properties of the metals you are working with. If you heated metals such as silver and copper to the same temperatures used in the brazing technique you will most likely melt your metal.
Key Concepts/ Common problems/Health and Safety
The same concepts, problems and health and safety issues apply as used in the annealing process
Brazing is the process of bonding two metals together using a brazing smelter. it is a process similar to hard soldering the main difference being the temperature with brazing is much hotter than soldering at around 450°C. Steel would need to be brazed because of its hardness.
To prepare for brazing your metal follow the same steps as I have described in the annealing process, before you heat up anything clean the surface of the metal you are joining can use glass paper for this, the cleaner the metal the better end result in brazing you will get.when you are ready to start heating the metal apply some Sif flux to the area you wish to join, this will bond the brazing smelter to the steel, in schools is Borax is more commonly used (the Brazing smelter is a rod with a brass colour to it). Heat up the metal and when it glows a fairly bright orange it is ready for you to add your smelter, heat the end of this up and if it into the flux, then hold thing onto the side of the area you are bonding. it is important that the metal is hot enough otherwise your smelter may not bond or it may not join smoothly. Unlike in annealing you are not meant to quench it afterwords as it can weaken the join.
Hard Soldering
This process is much the same as the brazing process but at a considerably lower temperature, the main principles and techniques remain the same however things such as the Flux, solder and temperature change. Easy-flow flux is commonly used, Silver solder replaces brazing smelter and the temperature is lower because of the properties of the metals you are working with. If you heated metals such as silver and copper to the same temperatures used in the brazing technique you will most likely melt your metal.
Key Concepts/ Common problems/Health and Safety
The same concepts, problems and health and safety issues apply as used in the annealing process