1) The oxide scale in the furnace must be frequently cleaned with a brush, broom or compressed air to prevent a short circuit from falling on the alloy element, and generally should not be cleaned less than once a month.
2) Every time the heat-resistant steel components such as the bottom plate, citrus exhaustion, and furnace tank are used for a period of time, it is best to lift and knock to remove the iron oxide scale to avoid collapsing or burying the components. In particular, chromium-manganese nitrogen steel is more serious when used in the later stage.
3) The lower teeth of the box furnace door and the ring knife of the parallel furnace lid must be tightly inserted into the sand sealing tank, and the sand in the sand seal cannot be overfilled, and it must be flat. If the sand falls into the furnace, it should be cleaned up in time. For cryogenic furnaces, a layer of intact asbestos rope liner can be applied.
4) The externally heated salt bath furnace should regularly lift out the citrus vortex to remove molten salt. The condensate salt on the surface of the element can be cleaned with hot water; The condensed salt on the brick can be removed by scraping.
5) The lid of the brass insulation furnace must be tightly docked to prevent "copper frost" from falling into the furnace and eroding the components.
6) Avoid contact with non-ferrous metals such as copper, aluminum, zinc, tin, and lead with electric heating components, whether it is fine powder, melt or steam, the erosion of components at high temperatures is very harmful. This is because the eroded part forms a "pockmarked pit", the cross-section becomes smaller, and finally it burns out due to overheating.
7) The trolley cover plate for lifting electric annealing furnace should be tightly pressed to prevent it. When the casting is annealed, sand is dropped and the components are buried and overheated melting occurs. Therefore, it is necessary to check frequently and remove the accumulated sand in time.
8) Due to thermal expansion and contraction and creep elongation when heating up and stopping the furnace, the bolts of the leading rod wiring clips are prone to oxidation loosening, and should be checked and tightened regularly.
9) The hole of the lead rod should be tightly blocked to avoid leakage of protective gas burning here, causing the rod body to oxidize and peel off, so that the lead rod and the clamp are in poor contact.
10) In tankless carburizing furnaces or when using a controlled atmosphere containing CO, carbon dissociation will occur and cause short circuits. Therefore, the furnace door should be opened frequently or regularly purged with compressed air to burn the carbon combustion in time.
