1. The oxidation and decarburization of the surface of the workpiece during the heating process are completely eliminated, and a clean surface without deterioration layer can be obtained. This has a great effect on the improvement of the cutting performance of tools that are only ground on one side during sharpening (e.g. twist drill grinding with the decarburized layer on the groove surface directly exposed to the cutting edge).
2. There is no pollution to the environment, and there is no need for three wastes treatment.
3. The accuracy of furnace temperature measurement and monitoring has been significantly improved. The indicated value of the thermocouple is ± 1.5°C from the furnace temperature. However, the temperature difference of different parts of a large number of workpieces in the furnace is large, and if the thin gas is used for forced circulation, it can still be controlled within the range of ±5°C.
4. High degree of mechatronics. On the basis of the improvement of temperature measurement and control accuracy, workpiece movement, air pressure adjustment, power adjustment, etc. can be pre-programmed and set, and quenching and tempering can be carried out step by step.
5. The energy consumption is significantly lower than that of the salt bath furnace. The modern and advanced vacuum furnace heating chamber uses insulated walls and barriers made of high-quality thermal insulation materials, which can highly concentrate the electric heating energy in the heating chamber, and the energy saving effect is remarkable.