The working principle of a vacuum quenching furnace is to heat the workpiece to the quenching temperature under vacuum. When cooling is needed, nitrogen is first introduced into the furnace to start the fan. Once the fan operates normally, the furnace is filled with gas, and the workpiece is cooled through a heat exchanger, with air supplied via ducts for quenching.
The vacuum furnace adopts a horizontal structure with two or three chambers and is equipped with horizontal operation and vertical lifting mechanisms, driven by either hydraulics or motors. It features flip-plate or insert-plate vacuum thermal isolation, graphite or nichrome strip heating elements, full carbon felt insulation screens, and the cooling chamber can optionally use 2-bar pressure cooling. The vacuum level can be selected as needed, ranging from 10⁻¹ Pa to 10⁻⁵ Pa.
It supports atmospheric carburizing or pulse carburizing, providing fast carburizing speed, high-quality carburized layers, and deep carburizing capability.
The main instruments and components of the electrical control system are imported, enabling fully automated operation.