Induction heating is a fast, non-contact industrial heating process. It is mainly used in hardening, tempering, annealing, melting, brazing, forging and other industrial fields. Learn about induction heating principles, applications, and find ways to help you optimize your heating process.

Induction Heating

Induction Heating is a high-speed, precise, controlled, and repeatable process. The induction coils pass AC through the electromagnet to create a fast-changing magnetic field that produces heat from the middle depth of a metal piece outward. Heating remains constant, unaffected by variables like contact resistance or changes in heat transfer rates due to changing surface conditions.

Induction Melting

Induction melting solves complex industrial problems such as using high melting-temperature alloys like titanium, nickel-based alloys, and stainless steel. The advantages of the induction furnace are its cleaner, energy-efficient, and more controlled melting process. Induction furnaces comprise a nonconductive crucible holding the metal pieces to be melted, enclosed by a copper coil.

Induction Tempering

Induction tempered steel is usually done in furnaces that may have an option for protective gasses. The protective gas will keep the surface from oxidizing throughout the process. A lower frequency achieves results within seconds, as opposed to furnace-tempered applications which usually require hours.

Induction Brazing

The simplicity of creating a repeatable process makes induction brazing perfect for serial, high-volume manufacturing processes. Brazing induction lowers the need for oxidation and expensive clean-up, especially if you use rapid cooling cycles. Using an induction braze instead of the traditional torch may improve joint quality and reduce the time required per piece.

Induction Soldering

Induction Soldering is where different metallic objects are joined by melting and allowing the filler metal (solder) to flow across the interface of the joint. It has various applications in the automotive, circuit board, piping, jewelry and HVAC industries. Contact us today to discuss your soldering project.

Induction Annealing

Induction annealing removes stresses and strains from a metal that can occur during work processes, preventing the part from warping or cracking during its operational lifetime. Induction annealing produces heat directly within a workpiece using alternating electromagnetic fields.

Induction Hardening

Induction hardening is a contactless heating process using the principles of electromagnetic induction to generate heat within a workpiece’s surface layers. Surface hardening increases the resistance to wear and may be used to improve the strength of heavily stressed components.

Induction Cooling Systems

A unique closed-loop cooling system is required for induction cooling, and all components are made of nonferrous materials. Larger induction cooling installations include: open-air evaporative towers and dry coolers. An air-cooled chiller uses mechanical refrigeration loops to dump heat from induction water into the ambient air.

Induction Coil & Copper Pipe Maintenance

Induction coil designs can significantly affect the part’s quality, process efficiency, and production costs. Compared with an inexpensive coil, a well-designed, industrial-grade induction coil can last as much as 30 times longer, depending on the application, care, and environment. You can trust FOCO to ensure your coils are functioning at top-level efficiency.