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通过对托辊轴的断口形貌、显微组织、硬度等进行试验分析,结果表明,托辊轴表面淬火工艺选择不当,导致轴身表面淬火不良及淬硬层不均匀是导致托辊轴最终断裂的主要原因。
The results of the analysis of the fracture surface, the microstructure and the hardness of the roller shaft indicate that the surface quenching of the roller shaft is not properly selected, which results in the poor quenching of the shaft surface and the unevenness of the hardened layer, The main reason for fracture.