Reasonable selection of heat-resistant steel members
In all kinds of heat treatment furnaces, in order to bear workpieces at high temperature, heat resistant steel components with different materials and different structural forms are adopted according to the temperature of the furnace and the different heat treatment processing, such as bottom plate, furnace pot, crucible, guide rail and material plate, etc. Most of these components are castings, relatively bulky, so they store a lot of heat and consume a lot of energy, which seriously affects the improvement of the heat efficiency of the furnace.
1. Reduce the weight of heat-resistant components by replacing castings with profiles
In the continuous work of heat treatment furnace, a large number of heat resistant steel components, such as conveyor belt electric furnace track, hot roller, pillow rail, etc., these components are cast molding, often "fat head big ears", a large number of use of heat resistant steel that increases the weight of the furnace. The weight can be reduced if these components are converted to braided mesh bands of heat-resistant steel wire or to be punched and joined together with heat-resistant steel plates
1/2 level ~ one-third. This method can save 15% -30% electricity, but the strength of the section is not as high as that of the casting.
2. Adopt investment casting to reduce heat-resistant components
In order to reduce the weight of steel members, in addition to using profiles instead of casting, casting method can also be used. Due to the fine process of investment casting, not only the surface of the parts is smooth and clean, there is no slag inclusion, porosity, sand holes and other defects, but also the investment casting can adapt to a variety of particularly complex components. Thus the wall thickness of heat-resistant steel members can be reduced. Suzhou keda furnace industry co., LTD., founded in 1986, specializes in the manufacture of pallet furnace, cover furnace, heat treatment processing, bright annealing furnace, spheroidizing annealing furnace and other furnaces. For example, the wall thickness of the original furnace pot is 20-25mm, which can be reduced to 15-20mm by means of investment casting. Due to the reduction of the wall thickness of the heat-resistant steel casting, the weight of the component itself can be reduced by 10%-15%, and the energy saving effect is very good. The practical application also shows that the life of the investment casting is 50% ~ 100% longer than that of the sand casting due to its higher surface quality and fewer casting defects.
3. Application of rare earth heat-resistant steel
Rare earth heat-resistant steel has good welding performance, easy to implement on craft plate welding, and in the same conditions, the life and strength is much higher than other kinds of heat resistant steel profiles, antioxidant, carburizing resistance, resistance to thermal shock resistance and so on all is good, is a kind of substitute as-cast ideal material of heat resistant steel components, there are broad prospects for development in the field of heat treatment and energy conservation.