Induction annealing focuses energy
Induction annealing efficiently delivers energy precisely where it is needed, resulting in accelerated heating times, minimised potential for process error, improved process control, and significant energy savings.
You want to be sure your fixture can present the parts in the same exact place from part run to part run. That’s the biggest variable that leads to non-repeatability with induction brazing processes.
You also want to be sure the fixture doesn’t heat up over time and apply additional heat to the part. So as the fixture heats with multiple runs, you want to be sure it can be cooled so it doesn’t add additional heat.
The induction coil should not vibrate, which can cause the coil to be move, so anchoring it is important. There are other variables, whether it is induction or not, like the quality of the braze alloy, the braze flux, the consistency of the flux, that are also important.
Both Steel and Tungsten carbides couple to the induction heating field. However since steels are typically magnetic they couple to induction field and produce heat due to eddy current heating as well as hysteresis heating.
Tungsten carbide only heats due to eddy current heating. Therefore steel typically heats at a faster rate than the carbide.
Induction technology offers a solution to the problems encountered in torch and furnace brazing. It eliminates the need for a highly skilled operator, helps in cutting down energy costs, and reduces the equipment footprint.
Additionally, it enables the implementation of a lean manufacturing process, resulting in the production of higher quality parts.
Induction heating provides a better solution for adhesive curing than air curing, hot fan curing or curing in large ovens which must be run continuously.
Curing with induction heating catalyses or initiates chemical and molecular level structural changes in a polymeric materials such as epoxies, phenolics, polyesters and silicones.
These materials are applied in many ways to various products for bonding, protective coating, sealing, insulation and other uses.
Induction heating is a widely adopted method for preheating bolt and screw heads before the forging process.
This technique brings numerous advantages to the warm or hot heading processes, enhancing their efficiency and effectiveness.
Induction heating efficiency is derived from the following: selective heating, energy produced directly inside the metal without the aid of a transfer medium, and the ability to insulate the hot part from losing its heat to the environment.
Some advantages of induction forging include maintaining a consistent rate of production, increasing process efficiency, and minimising the formation of scale.
A Faraday ring or shield is a device that absorbs magnetic fields radiated by induction coils.
Local sections can be insulated with shorted loops or rings. However, for general shielding, a Faraday cage is recommended around the induction coil to block magnetic field radiation in all directions.
Soldering is a technique that involves using lower temperatures compared to brazing.
While soldering may result in a slightly weaker joint, it is actually preferred for certain applications, especially those that involve small components.