Stiefel Induction Heaters: Energy-Efficient Solutions Since 2013

Super Audio Frequency (SAF) induction heaters fill the critical gap between medium and ultrasonic frequency ranges, typically operating between 10 kHz and 30 kHz. This frequency band offers a versatile balance between penetration depth and heating intensity, making it suitable for a broad array of medium-depth hardening and heating tasks. SAF induction heating is particularly well-suited for components that require a deeper hardened case than what ultrasonic frequencies can provide, but where the slower heating of lower frequencies is not desirable. Common applications include the hardening of larger gears, sprockets, axles, and hydraulic rods. The technology provides excellent control over the hardening pattern and depth, ensuring optimal wear resistance and part longevity. Beyond hardening, SAF heaters are highly effective for forging, brazing of medium-sized assemblies, and annealing of bars and tubes. The efficiency of the super audio frequency range often results in faster cycle times and lower energy consumption per part compared to alternative methods. At Stiefel Combustion, our SAF induction heating systems are designed for robustness and ease of integration into automated production lines. They feature advanced control systems that allow for precise management of power, temperature, and time cycles. To determine if a super audio frequency induction heater is the optimal solution for your specific component size and material, please contact our technical specialists for an application analysis.