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通过对五种典型工程材料的磨料磨损碎片的形貌和显微组织的研究,探讨了磨损发生时金属的迁移(流失)过程。金属被磨损的主要机制是显微切削和犁沟变形。观察了由于摩擦热而造成显微切屑的显微组织的变化,说明切屑是表现磨损发生条件更敏感的标记。因此,材料的高温硬度也是与材料耐磨性相关的一个重要性质,或许是严重磨料磨损条件下选择耐磨材料的重要标准之一。
Through the study of the morphology and microstructure of abrasive wear debris of five kinds of typical engineering materials, the process of metal migration (loss) during wear is discussed. The main mechanism of metal wear is micro-cutting and furrow deformation. The change in the microstructure of the micro-swarf due to the frictional heat was observed, indicating that the swarf is a more sensitive indicator of the occurrence of wear. Therefore, the high temperature hardness of the material is also an important property related to the wear resistance of the material, which may be one of the important criteria for selecting the wear resistant material under severe abrasive wear conditions.