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利用光学显微镜 (OM)、扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)和 X射线能谱 (EDAX)等分析测试仪器考察了铁基高合金耐磨堆焊层在常温滑动干摩擦条件下的磨损失效机制 .结果表明 ,在常温滑动干摩擦条件下 ,堆焊层的磨损失效机制表现为表层的塑性变形及局部积累 ,随后磨损裂纹在亚表层相界面和晶界等处形成并扩展和连通 ,最后发生表层材料分离的过程 .其结果可为有针对性地设计具有高耐磨性和良好综合性能的堆焊合金提供参考
The properties of the iron-based superalloy wear-resistant surfacing layer were investigated under OMT, SEM, TEM and EDAX. The results show that the wear failure mechanism of the overlay is the plastic deformation and local accumulation of the surfacing layer under the condition of sliding dry friction at room temperature and then the wear crack is formed and extended at the subsurface phase boundary and the grain boundary Connectivity, the final occurrence of surface material separation process.The results can be targeted for the design of high wear resistance and good comprehensive properties of the surfacing alloy provide a reference