Explanation

Iron and niobium alloy, mainly used as additive for alloy, usually contain 50% -70% niobium plus tantalum. ferroniobium is usually produced by silicothermic method or aluminothermic method, so it also contains 1.0% -3.0% silicon and 2.0% -3.8% aluminum. GB/T7737-2007 has clear regulations on the grade and chemical composition of ferroniobium. The addition of niobium to steel can significantly change the hot deformation behavior. Niobium carbonitride formed by niobium and carbon and nitrogen in steel can prevent grain growth and produce precipitation strengthening effect. Niobium can also improve the high temperature strength of steel. Therefore, silver is widely used in low alloy high strength steel to improve strength, toughness and weldability, stainless steel and heat resistant steel to improve high-temperature strength and intergranular corrosion resistance, and high temperature alloy to improve high-temperature performance.

Classification