Heat treating services including HSS Heat Treatment, Induction Hardening, Hardening and Tempering, Gas Carburizing and ect. YUELON induction heating machines are wildly used in heat ... ect.Heat treating services including HSS Heat Treatment, Induction Hardening, Hardening and Tempering, Gas Carburizing, Case Hardening, Toughening, Carbo Nitriding, Core Refining, Spherodizing, Annealing, Normalizing ...