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采用脉冲等离子体爆炸表面改性技术(PPT)对65Mn钢进行处理。通过光学显微镜、X射线衍射仪、扫描电镜、能谱仪、显微硬度计和摩擦磨损试验机研究了经改性处理前后样品的组织、形貌、相结构、显微硬度和耐磨性能的变化。结果表明:经PPT改性处理后,在65Mn钢表面形成了不同厚度的改性层;该过程中65Mn钢材料的表层发生α-Fe相向γ-Fe相的转变,且因渗氮效应生成FeN和Fe_2N相。经PPT改性处理后,试样表面的硬度和耐磨性提高;当电容容量为100%C时,硬度较基体而言提高了80%,磨损量减少为基体的一半。
65Mn steel was treated by pulsed plasma explosion surface modification (PPT). The microstructure, morphology, phase structure, microhardness and wear resistance of the samples before and after modification were studied by optical microscope, X-ray diffraction, scanning electron microscopy, energy dispersive spectrometer, microhardness tester and friction and wear tester Variety. The results show that the modified layer of 65Mn steel is formed on the surface of 65Mn steel after PPT modification. The transformation of α-Fe phase to γ-Fe phase occurs in the surface of 65Mn steel and the formation of FeN And Fe 2 N phase. After PPT modification, the hardness and wear resistance of the sample surface increased; when the capacitance of 100% C, the hardness increased by 80% compared with the matrix, the wear reduced to half of the matrix.