Stainless steel castings manufacturers bring you the role of heat-resistant steel

Heat resistant steel is an stainless steel casting that has high strength and good chemical stability at high temperatures. What is the role of heat-resistant steel, you know? Let's take a look at DeZe.
The elements formed by ferrite such as chromium, aluminum and silicon promote the formation of a dense oxide film on the metal surface at high temperatures, preventing the oxidation from continuing, and are the main elements for improving the oxidation resistance of steel and the corrosion resistance to high temperature gases. However, excessive aluminum and silicon content can seriously deteriorate room temperature plasticity and thermoplasticity. Chromium can significantly improve the recrystallization temperature of low alloy steel. When the content is 2%, the strengthening effect is the best.
Nickel and manganese can form and stabilize austenite. Nickel can increase the high temperature strength of austenitic steel and improve the carburization resistance. Although manganese can form austenite on behalf of nickel, it impairs the oxidation resistance of heat-resistant steel.
Vanadium, titanium and niobium are strong carbide forming elements, which can form finely dispersed carbides and increase the high temperature strength of steel. The combination of titanium, niobium and carbon also prevents intergranular corrosion of austenitic steels at high temperatures or after welding.
Carbon and nitrogen can expand and stabilize austenite, thereby increasing the high temperature strength of heat resistant steel. When the steel contains more chromium and manganese, the solubility of nitrogen can be significantly increased, and nitrogen alloying can be used instead of the more expensive nickel.
Boron and rare earth are trace elements in heat-resistant steel. Boron is dissolved in the solid solution to distort the crystal lattice. Boron on the grain boundary can prevent element diffusion and grain boundary migration, thereby increasing the high temperature strength of the steel. The rare earth element can significantly improve the oxidation resistance of the steel and improve the thermoplasticity.
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