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Dual-freqeuncy Induction Hardening Systems

Dual-frequency induction hardening is a technology that is used to heat treat precise gear materials that require contour hardening in order to make them high-grade materials. PSTEK’s dual-frequency induction hardening instantly outputs intermediate frequency and high frequency using one inverter, realizing contour hardening.

The use of dual frequency for contour hardening enables a stronger impact resistance, fatigue strength and wear resistance than a general induction hardening. As well, only the required parts are heated for a short period of time, which offers significant benefits. The minimization of material deformation can considerably reduce energy costs and post-processing process costs, while improving productivity. This is a next-generation technology that is optimized for the automobile and special part industries, which require a high level of product quality.

Features & Benefits

PSTEK’s patented technology that outputs dual frequency in the structure consisting of “one power supply and one coil”
※ Patent pending: Induction heating apparatus using dual-frequency resonant inverter (April 2015)
Simple structure of power circuits and devices minimizes the installation area and makes installation easier

The surface with its hardened contour strengthens wear resistance, and the internal soft layer improves impact resistance and fatigue strength, which substantially increases the durability of parts

Our independently developed 32bit DSP regulation system reduces the heating rise time to 10 ms
Material deformation is minimized compared to cementation, nitration and general high-frequency heat treatment (improved roundness).

Deformation is considerably reduced by heating and cooling only the parts that need hardened layers at an ultra-high speed
Minimized deformation allows post-processing to be omitted or reduced, thus reducing processing costs and dramatically improving productivity
Hardening and tempering processes can be replaced by a single process, depending on the materials

Slow-speed DC charging system / A high-frequency and high-speed discharge heat treatment system is applied to reduce power-receiving contract power to one fifth of the maximum power
Ex) Up to 1 MW dual frequency devices can be operated using 200 kW power-receiving facilities, and energy costs can be reduced by lowering the maximum power-receiving capacity

Products & Services

You can choose solutions you need according to your situation.

Dual-frequency induction heating system
CT(Current Transformer) for dual-frequency
Quenching cooling system
Machines & Control systems

Consulting services by experts on heat treating quality improvement
Customized design of heating coil and magnetic focusing core
Device installation and on-site test run
After-sale services and regular inspection services
Education services: technology, engineering, on-site education, quality management index, etc