Introduction:

Chromium iron is an iron alloy composed of chromium and iron. It is an important alloy additive for steelmaking. Chromium iron is divided into high carbon chromium iron (with a carbon content of 4-8%), medium carbon chromium iron (with a carbon content of 0.5-4%), low carbon chromium iron (with a carbon content of 0.15-0.50%), micro carbon chromium iron (with a carbon content of 0.06%), ultrafine carbon chromium iron (with a carbon content of less than 0.03%), as well as silicon chromium alloy, nitrided chromium iron, etc.

Adding chromium to steel can significantly improve its oxidation resistance and increase its corrosion resistance. Chromium is present in many steels with special physical and chemical properties. Chromium in steel is added with ferrochrome. High carbon chromium iron is used as an alloying agent for ball steel (0.5%~1.45% Cr), tool steel, mold steel (5%~12% Cr), and high-speed steel (3.8%~4.4% Cr), which can improve the hardenability of steel, increase its wear resistance and hardness. Adding chromium to cast iron can increase hardness and improve wear resistance. The mechanical properties of cast iron can be improved by containing 0.5% to 1.0% chromium. High carbon ferrochromium and furnace grade ferrochromium are widely used as furnace materials for smelting stainless steel (AOD or VOD method), reducing production costs. Medium and low carbon ferrochromium is used in the production of medium and low carbon structural steel, carburized steel, gears, high-pressure blower blades, valve plates, etc. Microcarbon ferrochromium is used in the production of stainless steel, acid resistant steel, heat resistant steel, and electric heating alloys.