The main characteristics of silicon manganese nitride are high content of important elements, low content of harmful impurities such as phosphorus, high utilization rate of nitrogen after adding to the melt, and low addition amount.
The application of silicon manganese nitride is ferromanganese nitride as an alloy additive for nitrogen and manganese. It is mainly used in the production of steel, alloy steel, stainless steel and materials in the automotive, shipbuilding and aviation industries. The manganese content in ordinary carbon steel is about 0.%~0.8%. If the content is too high, the steel will become brittle and hard, reducing the rust resistance and weldability of the steel. Nitrogen can be partially used in iron. Nitrogen can strengthen and improve hardenability through solid solution, but it is of little significance.
Since nitride precipitates on the crystal boundary, it can improve the high-temperature strength of the crystal boundary and increase the creep strength of the steel. In some cases, it also acts as an alloy. The research on manganese nitride master alloy products has important practical significance and economic value for the deep processing industry of manganese metal. Manganese is added to steel as a deoxidizer. Manganese can form high melting point (1600) MnS with sulfur, which is harmful to some extent.
