What are the characteristics of vacuum atmosphere furnace

The characteristic of the vacuum atmosphere furnace is that at a certain temperature, an artificially prepared atmosphere of a certain composition is passed into the furnace to achieve certain heat treatment purposes, such as gas carburizing, carbonitriding, bright quenching, annealing, normalizing, etc. wait. The atmosphere furnace mainly has the following characteristics:
1. Furnace sealing: In order to control the atmosphere in the vacuum atmosphere furnace and maintain the pressure in the furnace, the working space in the furnace must always be isolated from the outside air to avoid air leakage and air inhalation. Therefore, the furnace shell, masonry, furnace door and all external connections
Such as fans, thermocouples, radiant tubes, push-pull feeders, etc. are all sealed.
Vacuum atmosphere furnace
2. Furnace atmosphere control: In order to maintain a certain carbon potential in the furnace, in addition to controlling the stability of the atmosphere components, the atmosphere in the vacuum atmosphere furnace must also be automatically controlled. Therefore, various control instruments are needed to continuously or periodically measure and adjust the atmosphere in the furnace.
The air supply volume in the furnace.
3. Heating method: In order to ensure the stability of the atmosphere, vacuum atmosphere furnaces can be divided into two types: muffle furnaces and muffleless furnaces. The flame of the muffle furnace is outside the muffle, and the workpiece is heated indirectly inside the muffle; the furnace uses various flame radiant tubes or electric radiant tubes to separate the flame or electric heating
The main body is kept away from the gas in the furnace to avoid damaging the stability of the atmosphere in the furnace.
measure. 4.
Explosion-proof device: The mixture of reducing gas and air reaches a certain mixing ratio and can easily cause an explosion at a certain temperature. Therefore, the front and rear chambers, quenching chamber, and slow cooling chamber of the furnace are all equipped with explosion-proof devices. Vacuum atmosphere furnaces are equipped with explosion-proof devices. Gas and exhaust control systems must also be explosion-proof
5. Mechanization and automation level: Various vacuum atmosphere furnaces have high sealing requirements and complicated discharging operation processes, requiring one furnace for multiple purposes. In mass production, large-scale joint heat treatment dedicated or dual-purpose units are often formed, so a high degree of jointing is required.
Mechanization and automation.
6. Refractory materials: Vacuum atmosphere furnace uses reducing gas. In order not to affect the service life of the masonry and not destroy the normal atmosphere in the furnace, the furnace masonry is required to use anti-carburization refractory materials.