Resistance wire maintenance
1) The scale inside the furnace must be cleaned regularly with a brush, broom or compressed air to prevent short circuits from falling on the alloy components. Generally, the cleaning should not be less than once a month.
2) For heat-resistant steel components such as bottom plate, citrus, and furnace cans, it is better to hang up and knock off the iron oxide skin to avoid collapse or burying components. Especially for chrome-manganese-nitrogen steel, the peeling is more serious when used later.
3) The lower teeth of the box furnace and the ring cutter of the parallel furnace cover must be tightly inserted into the sand sealing groove. The sand inside the sand seal cannot be overfilled and must be leveled. If it falls into the sand in the furnace, it should be cleaned up in time. For low temperature furnaces, a layer of intact asbestos rope liner can be placed.
4) The external thermal salt bath furnace should periodically hang the vine vortex to remove the molten salt. The condensate on the surface of the component can be cleaned with hot water; the condensate on the shelf can be removed by scraping.
5) The cover of the brass holding furnace must be tightly connected to prevent the "copper frost" from falling into the furnace and eroding the components.
6) Avoid contact between non-ferrous metals such as copper, aluminum, zinc, tin, lead and electric heating elements. Whether it is fine powder, melt or steam, it is very harmful to the erosion of components at high temperatures. This is because the eroded portion forms a "pit hole", the cross section becomes small, and finally it is blown due to overheating.
7) The cover plate of the lifting electric annealing furnace should be tightly pressed to prevent overheating and melting when the casting is annealed and the components are buried. Therefore, it is necessary to check frequently and remove sand in time.