What characteristics should be considered when choosing an atmosphere furnace
Time：2020-09-11 15:02
In order to control the atmosphere in the furnace and maintain a certain furnace pressure, the working space in the atmosphere furnace should always be isolated from the outside air to avoid air leakage and inhalation as much as possible. In a controlled atmosphere furnace, the electric heating element should be equipped with high carburizing materials or anti-carburizing coatings, and the low-voltage power supply should try to avoid short circuit damage or carbon deposits on the furnace wall. In the process of loading, unloading, quenching and cooling, it needs to be carried out under sealed conditions. Therefore, the quenching mechanism must be closed to control the atmospheric cooling chamber in the front and rear unloading chambers. The furnace door connected to the outside must be strictly constructed, and the fire-proof sealing device must be opened.
What characteristics should be considered when purchasing an atmosphere furnace:
1. Refractory materials: The atmosphere furnace uses reducing gas. In order not to affect the service life of the masonry and not to damage the normal furnace atmosphere, the furnace masonry is required to use anti-carburizing refractory materials.
2. Degree of automation: Various atmosphere furnaces have high requirements for tightness, and the process of loading and discharging is complicated. One furnace is required to be used for multiple purposes. In mass production, it is often composed of large-scale joint heat treatment special or more than dual-use units. High degree of mechanization and automation.
3. Airtightness: In order to control the atmosphere in the furnace and maintain the pressure in the furnace, the working space in the furnace must always be isolated from the outside air. Therefore, the furnace shell, masonry, furnace door and all external connecting parts such as fans are required. Features Sealed devices are used to operate thermocouples, radiant tubes, and push-pull feeders.
4. Explosion-proof device: The reducing gas and air are mixed to a certain mixing ratio. When purchasing an atmosphere furnace, it should be considered that it is easy to cause explosion at a certain temperature. Therefore, explosion-proof devices are installed in the front and rear chambers, quenching chamber and slow cooling chamber of the furnace. The control system of the furnace gas supply and exhaust gas should also have explosion-proof measures.
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