Main performance characteristics of atmosphere furnace

There are many kinds of atmosphere furnaces, which can be classified according to the atmosphere in the furnace (f-exothermic, x-endothermic, yl-organic liquid cracking, d-nitrogen, a-ammonia preparation, m-charcoal, N-ammonia, and the last Q represents the atmosphere)
The atmosphere furnace is mainly composed of feeding mechanism, heating furnace, quenching tank, washing machine, tempering furnace, etc. the structure of quenching tank and heating furnace is as follows:
Quenching tank structure: the device has a frequency conversion speed regulating oil agitator, which can greatly increase the quenching deformation of the workpiece; High power cooling air-cooled heat exchanger can improve the safety of the equipment; The blocked leakage increases the oxidation and decarburization of the workpiece. Use an oil curtain to increase the smoke entering the heating chamber.
Structural features of heating furnace: radiant tube heating and complete double-sided heating of workpiece, which greatly improves the heating efficiency and average furnace temperature; The light anti-seepage full fiber lining is adopted, which saves about 30% energy compared with the impermeable brick lining; The heat-resistant steel wire mesh belt is driven by the rotating roller to increase wear and improve service life. The key control components use export products, which greatly improves the efficiency of the equipment?? Overall reliability. In order to improve the safety of products, safety alarm system and mechanical interlocking device are added. The dialogue operation interface reflects all operation modes of the equipment and can process and correct various process parameters.
Main performance characteristics of atmospheric furnace:
1. Refractory: reducing gas is used in the furnace without silencing atmosphere. In order not to affect the service life of the masonry and the normal atmosphere of the furnace, the furnace masonry needs to adopt anti carburizing refractory.
2. Degree of automation: the sealing requirements of various atmosphere furnaces are high, and the loading and unloading operation is complex, so one furnace needs to be used. In large-scale production, it is composed of large-scale comprehensive heat treatment or dual-purpose units. Higher degree of mechanization and automation.
3. Sealing: in order to control the atmosphere in the furnace and maintain the pressure in the furnace, the working space in the furnace is always isolated from the external air, and try to avoid air leakage and air inhalation, so that the furnace shell, masonry, furnace door and all external connecting parts, such as fan, thermocouple, radiant tube, push-pull feeder, etc., are sealed.
4. Atmosphere control: in order to maintain a certain carbon potential in the furnace, in addition to controlling the stability of atmosphere composition, it can also automatically control the atmosphere in the furnace. Therefore, various control instruments are needed to continuously and periodically measure and adjust the amount of gas supplied to the furnace.
5. Explosion proof device: reduce the mixing ratio of gas and air to a certain degree, which is easy to cause explosion at a certain temperature. Therefore, the front and rear chambers of the furnace, quenching chamber and slow cooling chamber are equipped with explosion-proof devices, and the furnace gas supply and exhaust gas control system also has explosion-proof measures.
6. Heating mode: in order to ensure the stability of atmosphere furnace, atmosphere furnace can be divided into muffle furnace and muffle free furnace. The flame of muffle furnace is outside the muffle furnace, and the workpiece is indirectly heated in the muffle furnace; The furnace adopts various flame radiant tubes or electric radiant tubes to separate the flame or electric heater from the furnace gas, so as to avoid crushing the stability of the atmosphere in the furnace.