Introduction of heat resistant cast iron

Heat resistant cast iron can be used at high temperature, its anti oxidation or anti growth performance in line with the requirements of the use of cast iron.

"Growth" is the oxidation of the oxidation of gas along the graphite sheet boundary and the crack penetration into the internal oxidation of the cast iron, as well as the Fe3C decomposition of the graphite caused by the volume expansion of castings. Adding aluminum, silicon, chromium and other elements to cast iron, so that the surface of the casting to form a layer of dense SiO2, Al2O3, CrO3 and other oxide film, can significantly improve the oxidation resistance at high temperature. At the same time, the matrix of the cast iron can be changed into a single phase ferrite. In addition, silicon and aluminum can improve the phase transition point, so that it does not occur at the working temperature of solid phase transition. Can reduce the volume change and the micro crack. Chromium can form stable carbide and improve the thermal stability of the cast iron.

Heat resistant cast iron are commonly used in cast iron, high chromium cast iron, nickel chromium silicon cast iron etc.. Mainly used in the manufacture of heating furnace accessories. Such as furnace bottom plate, feed chain component, heat exchanger, etc..