... constant power control to greatly optimisze the heating process of metals,realize efficiency and fast heating and ... extrusioned within 3-5seconds heating.B, Metal material heating annealing, convenience to stretch. Modeling embossing Etc. such ... heating make pin, stainless steel products annealing, stretch, expanding.3.Heat treatmentHardening, Annealing, Tempering for Surface, inner bore, local, ...