Commonly used heat-resistant cast iron materials mainly include high-silicon cast iron, high-aluminum heat-resistant cast iron, high-chromium heat-resistant cast iron and RQTSi4Mo cast iron.
high silicon cast iron : the silicon content is 5-6%, and its working temperature can be stable at about 850 degrees. Although its mechanical properties are low and can only manufacture heat-resistant parts with low forces, it is often used in the bottom plate of various heating furnaces because of its oxidation resistance.
high aluminum heat resistant cast iron : has good heat resistance, can work at a high temperature of 900 degrees. It is suitable for making the bottom plate of various heating furnaces, but the mechanical properties are poor, and the aluminum element is easy to oxidize to form slag inclusion.
high chromium heat resistant cast iron : Different heat resistant temperatures can be achieved by adjusting the chromium content. When the chromium content is 26-30%, the heat resistance temperature can reach 1000 degrees; When the chromium content is 32-36%, the heat resistance temperature can reach 1150 degrees, while maintaining high mechanical properties.
RQTSi4Mo cast iron : this is a common heat-resistant cast iron material with excellent high temperature properties, suitable for applications in high temperature environments. It contains 4% silicon and 4% molybdenum, and the addition of these alloying elements significantly improves the high temperature resistance of cast iron and can maintain the structural stability of the material at high temperatures.
In summary, when selecting heat-resistant cast iron materials, the appropriate type should be selected according to the specific working temperature and mechanical performance requirements. High silicon cast iron, high aluminum heat resistant cast iron, high chromium heat resistant cast iron and RQTSi4Mo cast iron each have their own characteristics and scope of application, these factors should be considered when choosing to ensure the best performance and service life of the material
