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).

高锰 (Mn) 铸钢 (HMS) 具有高韧性、耐磨性、高加工硬化性和相对较低的生产成本，这使其适用于岩石破碎和分级操作。尽管高锰钢的高温适用性有限，但它们也已用于熟料破碎机操作。在这项研究中，分析了熟料破碎机环境中使用的高锰钢锤的在役性能。对原始（未暴露）和使用中的材料进行微观结构和机械性能评估。结果表明，高使用温度（260 至 500°）暴露于 HMS 会导致奥氏体分解反应，可能导致材料韧性损失并最终失效。通过将固溶退火温度提高到~1125°C，