The VKT series Pre-vacuum tempering furnace is an efficient heat treatment equipment that combines Muffle tank (heat-resistant alloy sealed inner tank) with pre-vacuum technology, specially designed for high cleanliness and no oxidation tempering requirements. After the equipment quickly removes the impurity gas in the furnace through the pre-vacuum system, combined with the sealing protection of the Muffle tank, the workpiece is accurately tempered or annealed in an inert atmosphere or low vacuum environment, effectively eliminating the internal stress of the material, improving the toughness and dimensional stability, and completely avoiding oxidation, decarbonization and surface contamination. It is suitable for the tempering treatment of precision molds, high-speed steel tools, stainless steel parts, carbide and electronic components, widely used in tool manufacturing, auto parts, 3C electronics, medical equipment and other fields, especially suitable for high-end workpiece processing with strict requirements for surface quality and performance consistency.