Abstract
High-manganese (Mn) cast steels (HMS) exhibit high toughness, wear resistance, high work-hardenability and have a relatively low cost of production, which makes them suitable for rock crushing and sizing operations. Although high-Mn steels have limited high temperature applicability, they have been used in clinker crusher operations as well. In this study, the in-service performance of high-Mn steel hammers used in the clinker crusher environment was analyzed. Microstructural and mechanical property evaluation was performed on virgin (not exposed) and in-service materials. The results indicate that the high in-service temperature (260 to 500°) exposure of HMS enables austenitic decomposition reaction, potentially leading to a loss of material’s toughness and ultimately its failure. By increasing the solution annealing temperature to ~1125 °C, a complete dissolution of the grain boundary carbides could be achieved, which could counteract the loss of properties (especially toughness).
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The authors acknowledge that this research has been partially funded by an NSERC – CRD grant.
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Karanam, A., Prasad, A., Bichler, L. et al. In-service Performance of High-Manganese Steel Clinker Crusher Hammer. Inter Metalcast 16, 573–584 (2022). https://doi.org/10.1007/s40962-021-00646-z
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DOI: https://doi.org/10.1007/s40962-021-00646-z