Ferro Manganese

Manganese is an anti-oxidant element. In molten iron, manganese combines with oxygen and forms MnO, and this reaction reduces the percentage of oxygen to some extent. But this element is weak compared to strong deoxidizing elements such as Al, Si and is not used as an deoxidizing agent. What is important in well-cut steels is the tendency of manganese to combine with sulfur and the production of manganese sulfide. MnS formed in the melt tries to enter the slag. In the solid state, MnS present in the microstructure has low solubility and creates non-metallic inclusions. By removing MnS during melting and transferring it to slag, manganese is able to reduce the risk of embrittlement. Also, by moving the nose of the TTT curve to the right, it reduces the cooling rate to reach the martensite structure and increases the hardenability. Excess amount of manganese reacts with carbon and manganese carbide Mn3C is formed. Manganese is used in all types of carbon and low-alloy steels, as well as in welding as a filler. In stainless steels, manganese improves hot ductility.