Critical Analysis of Manufacturing of Manganese Steel Liners Used in Crushing and Mining Sector for Improved Performance

The scope of this paper is to understand the manufacturing process of austenitic manganese steel (AMS) casting liners specifically for cone crushers (consumable liners) used in the mining sector. During review work, an orthodox manganese steel manufacturing process was studied along with the heat treatment process's silent parameters, which directly affect the austenitic manganese steel wear properties and internal cast integrity. Also, the effect of the heat treatment of Austenitic manganese steel was discussed, which helps to improve austenitic microstructure with minimal carbides precipitation on grain boundaries. Various other silent factors in the heat treatment process, like effective quenching by controlling quenching time lag, medium temperature control, parts stacking gap, churning of the tank medium, etc., were also discussed and controlled during the heat treatment process. This helped to increase the toughness values significantly from 27 to 188 J, i.e., up to 7 times approximately. Also, there is a marginal increase in hardness from 209 to 237 BHN, around 15%, which helps sustain the impacts during application and improves wear life without failures. This was concluded that the manufacturing process of crusher liners followed by an adequate heat treatment process produces an improved austenitic microstructure with improved mechanical properties, resulting in higher wear life of consumable crusher liners in mining and crushing applications.