Vacuum Furnace Safe Operation

Vacuum heat treatment furnace is an advanced heat treatment equipment developed in recent years. Workpieces are heated and cooled in ultra-low pressure space. It has the advantages of good quality, energy saving, safety and less pollution.

The heating body of the vacuum furnace uses low voltage electricity, but the power supply voltage is still 380V. Safe electricity is still needed when operating.

When making vacuum furnace, it should be guaranteed that there is no leakage of air and water. The sealing of vacuum furnace body and cover is made of rubber parts, so water barrier is needed for cooling. If water leaks into the furnace, the furnace temperature will be very high, which will cause blasting. Workpieces processed by vacuum furnace should be cleaned of oil contamination on the surface, and oil vapor from quenching tank should be avoided from entering the furnace together. The mixture of oil vapor and air will form a blasting atmosphere. Once there is open fire or electricity, the blasting will occur. Therefore, the door of the vacuum furnace should be closed after charging, and the furnace can be heated by electricity only after vacuum is pumped out.

Advantages and Disadvantages of Vacuum Gas Quenching Furnace

Advantages: decarbonization under vacuum condition, small deformation. The appearance is bright and the function is improved. No decarbonization/oxidation.

Disadvantage: Cost is too high. Only suitable for high precision parts.

Note: Vacuum quenching is to complete the heat treatment process in a thin vacuum, mainly by radiation heating, no oxidation decarbonization, general quenching is to complete the heat treatment process in air, mainly by convection and conduction! The appearance depends on the atmosphere.

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