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本文采用光学金相显微镜和扫描电子显微镜观察分析了GCr15钢干滑动磨损产生的磨损表面层和磨损颗粒。结果发现在所有试验范围内磨损表面塑性变形层厚度与磨损颗粒最大厚度之间存在2∶1的直线关系,而在出现粘着磨损向熔化磨损转型后,这两者的厚度均减小。试验还观察到,依磨损程度不同可在磨损表面层产生表面白层、组织碎化层、明显塑性度变形层直至基体组织的分层结构,在这些分层界面最易于裂纹的萌生和扩展,而裂纹的产生既可在硬质点附近,又可因表层组织塑性变形的不协调造成。
In this paper, optical microscope and scanning electron microscope were used to analyze the wear surface layer and wear particles produced by dry sliding wear of GCr15 steel. It was found that there was a 2: 1 linear relationship between the thickness of the worn surface plastic deformation layer and the maximum thickness of the wear particles over all the experimental ranges, both of which decreased in thickness after the transition from adhesive wear to melt wear. The experiment also observed that according to the different degrees of wear, the surface white layer, the tissue degenerated layer and the obvious plasticity deforming layer can be formed on the worn surface layer until the hierarchical structure of the matrix structure, and the initiation and propagation of the crack are easiest in these delaminated interfaces. The crack can be generated near the hard point, but also due to the surface layer of plastic deformation caused by the uncoordinated.