When it comes to induction heating, the best metal is iron and its alloys.
This is because they have a ferromagnetic nature, which makes them highly responsive to induction heating.
Eddy currents can be generated in any conductor, but iron and its alloys are particularly efficient at generating these currents.
7 Key Factors to Consider
1. Ferromagnetic Nature
Iron and its alloys are the best for induction heating due to their ferromagnetic nature.
This property makes them highly responsive to the induction heating process.
2. Frequency of Alternating Current (AC)
The frequency of the AC used in induction heating plays a significant role.
Higher frequencies, between 100 and 400 kHz, are ideal for quickly heating the surface or skin of small or larger parts.
Lower frequencies, between 5 and 30 kHz, are more effective for deep and penetrating heat.
3. Resistance to Electric Current
Metals with high electrical resistivity, such as steel, carbon, tin, and tungsten, heat up quickly.
This is because they have a strong resistance to electric current.
Metals with low resistivity, like copper, brass, and aluminum, take longer to heat up.
4. Eddy Current Generation
Induction heating works by passing a high-frequency alternating current through an electromagnet.
The rapidly alternating magnetic field penetrates the object being heated, generating eddy currents.
These currents flow through the resistance of the material, heating it through Joule heating.
5. Magnetic Hysteresis Losses
In ferromagnetic and ferrimagnetic materials like iron, heat is also generated by magnetic hysteresis losses.
This adds to the overall efficiency of the heating process.
6. Precision and Control
Induction heating is a precise and controllable heating method.
It is suitable for various applications like case hardening, hardening and tempering, and annealing.
It is commonly used in industries such as automotive, aerospace, fiber optics, and ammunition bonding.
7. High-Quality Metal Production
Induction heating produces high-quality metals.
The heat comes from within the charge itself, eliminating the chances of contamination.
Temperatures can be controlled, preventing excess heat and maintaining the alloying elements of the metals.
The use of electromagnetic force ensures uniform composition by stirring the molten metal.
Continue Exploring, Consult Our Experts
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