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Induction Heating An electric induction heating machine operating.

Turn up the Heat with Induction

One of the most advanced methods of industrial heating is induction, which occurs when a conductive workpiece is placed within the magnetic field of an inductor. When the magnetic field penetrates the workpiece, it generates a circulating current (called eddy current) that generates heat directly in the workpiece.

Induction heating can be used for surface treatment of metals through hardening and tempering, brazing, forging, or for melting in induction furnaces. Heat-treated parts include saws, axles, fasteners, camshafts, crankshafts, gears and bearings. The vast majority of heat-treated parts are made of iron and steel.

Induction Surface Treatment

Induction surface treatment uses induction heating to change the chemical and physical properties of the workpiece material. This process allows lower-grade materials to meet more stringent hardness and durability standards, improving the strength, wear and fatigue properties of the metal.

Induction surface hardening is cleaner and more efficient than natural gas batch furnaces, producing no emissions at the point of use and allowing the operator to directly heat individual parts of the workpiece.

For more information, take a look at our Induction Surface Heating fact sheet.

Induction Melting Furnaces

Induction melting operates similarly to induction surface heating, but increased temperature causes the material to change phase from solid to liquid. Coreless furnaces are used for melting the material, and channel furnaces are used for holding molten metal until it is ready to be cast.

Induction melting furnaces offer lower total overall operating costs when considering charge materials (alloys, coke), energy for all phases of operation (melting, standby, holding), maintenance (refractory repair, furnace rebuilds), labor, and environmental compliance. They also are more efficient than convection or fossil-fueled furnaces, and are safer, cleaner and provide higher product quality.

Induction heating and melting are used in a wide variety of industries, including automotive, aerospace, transportation equipment, manufacturing, and primary metals processing.

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