Adding chromium to steel can significantly improve the oxidation resistance of steel and increase the corrosion resistance of steel. Many steels with special physical and chemical properties contain chromium. Chromium in steel is added with ferrochromium. High carbon ferrochromium is used as an alloying agent for ball steel (0.5%～1.45%Cr), tool steel, die steel (5%～12%Cr) and high speed steel (3.8%～4.4%Cr), which can improve the quenching of steel Permeability, increase the wear resistance and hardness of steel. Adding chromium to the cast iron can increase the hardness and wear resistance, and containing 0.5% to 1.0% chromium can improve its mechanical properties.
High-carbon ferrochromium and charge grade ferrochromium are widely used as smelting materials for stainless steel (AOD or VOD method) to reduce production costs. Medium and low carbon ferrochrome are used to produce medium and low carbon structural steel and carburized steel, and to manufacture gears, high-pressure blower blades, valve plates, etc. Micro carbon ferrochrome is used to produce stainless steel, acid-resistant steel, heat-resistant steel and electric heating alloy.
