Effect Of Chemical Composition On The Service Life Of Heat-resistant Steel

There are quite a variety of chemical elements, which can affect the service life of heat-resistant steel. These effects are manifested in enhancing the stability of the structure, preventing oxidation, formation and stabilization of austenite, corrosion prevention and other aspects. For example, rare earth elements, as trace elements in heat resistant steel, can significantly improve the oxidation resistance of steel and change the thermoplasticity. The basic materials of heat-resistant steel and alloy will generally choose the metals and alloy with relatively high melting point, large self-diffusion activation energy or low layer error energy. In a variety of heat resistant steel and high temperature alloy requirements for the smelting process is very high, because once the steel mixed with debris or some metallurgical defects will make the lasting strength limit of the material will be reduced. Therefore, the study of the role of chemical substances is also of profound significance.