The small editor from the well type nitriding furnace manufacturer will introduce the obvious advantages of selecting well type carburizing furnace pot

The surface outside the carburizing furnace will be oxidized and peeled, which will lead to cracking. The main form of failure is the gas leakage of the carburizing furnace tank. Casting defects have a great impact on the service life of the furnace tank, and there are often more opportunities for oxidation and cracking at the defects. After slight cracking, the furnace tank was used soon after repair welding, and then was damaged quickly, which was mainly caused by the decline of welding performance after oxidation and carburization.

As the outside of the carburizing furnace tank is close to the electric heating element, the temperature of the well type furnace is relatively high, and the carburizing furnace can reach 950-1000 degrees. The furnace tank has good oxidation resistance; The inner side of the furnace tank is in the carburizing atmosphere, which requires the carburizing furnace to have good carburizing resistance. At the same time, due to the large load of the carburizing furnace, it is also required that the carburizing furnace has high high temperature strength.

Sometimes ring cracks are generated below the carburizing furnace mouth, which is related to the structure of the carburizing furnace and the complex stress situation in this area. It can be seen from the structure that the ring crack area is the transition zone between the high temperature area in the carburizing furnace tank and the low temperature area at the upper tank mouth. Therefore, under the effect of different temperatures at the upper and lower parts, the thermal stress in this area is large. In addition, this area is just at the bottom of the sealing ring and the tank wall at the furnace tank mouth

Comparison of service life of carburizing furnace tank, Cr18Ni25Si2 The carburizing furnace pot of Cr25Ni20 steel has a long service life, more than 3 times that of Cr18Mn12Si2N steel.

The connected part is at the section change position. Due to the superposition of thermal stress and load stress, and the bottom of the seal ring is the supporting point of the whole carburizing furnace, the stress at this position is large during operation. Moreover, this is the hot spot of the casting, which is more likely to have casting defects, so there are annular cracks perpendicular to the stress.