【摘要】 通过扫描电镜观察、金相检验、化学分析以及硬度检测等手段,对中厚板轧机传动部位的十字接轴断裂的原因进行了分析,发现轴根部存在渗碳层并且变截面处圆角较小、表面加工较粗糙。可认为轴根部存在渗碳层使该处脆性增大、抗裂纹扩展的能力降低是引起该十字接轴断裂的主要原因;变截面处圆角较小、表面加工较粗糙引起应力集中也是引起该十字接轴断裂的重要因素。更多还原

【Abstract】 The fracture cross joint situated transmission part of thick plate rolling mill were analyzed by using SEM, metallographic examination, chemistry analyze, hardness test, etc. It is discovered that there is carburized layer, small chamfer and coarseness surface. Thus, it is suggested that carburized layer result greater brittleness and less ability resist crack spread is main reason of the cross joint fracture, and the small chamfer and coarseness surface result stress convergence is reason as well.更多还原