The role of commonly used alloying elements
After alloying elements are added to steel, a certain amount of alloy carbides can be formed to refine the grains, improve hardenability, and increase tempering stability to meet the requirements of increased wear resistance and toughness.
The role of Mn: Manganese strongly increases the hardenability of steel, greatly reduces the martensitic transformation temperature of steel, and increases the amount of residual austenite after quenching, which is beneficial to preventing quenching deformation, quenching cracks, and stabilizing the dimensions of the workpiece. However, reducing the thermal conductivity of steel has greater overheating sensitivity and aggravates the second type of temper brittleness. Mn should be added in combination with Mo, V, Cr, W, etc. It is limited in impact resistance and high strength and toughness mold steel.
The role of Si: Silicon increases the hardenability and tempering stability of steel, significantly improves post-deformation resistance and impact fatigue resistance; it can also improve the oxidation resistance and corrosion resistance of steel. However, silicon causes the carbon in the steel to precipitate in the form of graphite, causing a serious decarburization tendency and increasing the overheating sensitivity and second-type temper brittleness of the steel.
If you have more needs and questions about steel, please contact us!
GNEE Group receives visiting customers
GNEE Group office environment