After the production of heat-resistant steel into casting, with excellent performance and a wide range of uses, showing the particularity of heat-resistant steel. This heat-resistant steel material of various elements are inextricably linked, then these elements on the heat-resistant steel have played what role?

Since chromium, aluminum, silicon belong ferrite at high temperatures can induce a dense metal oxide film formed on the surface, preventing its oxidation, thus improving the heat-resistant steel in its resistance to oxidation and high-temperature gas corrosion played a key effect. But also have a good grasp of their amounts, as high levels but will make the room temperature ductility and thermoplastic serious deterioration.
Heat-resistant steel used to improve the strength and carburization resistance of nickel, manganese and other elements, because they can form and stabilize austenite; addition of vanadium, titanium, niobium are strong carbide forming elements, can form a fine dispersion carbide, improve the high temperature strength of steel, to prevent austenitic steels at elevated temperatures or intergranular corrosion after welding also has some help.