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采用网格化激光淬火和低温离子渗硫技术对42MnCr52钢进行复合表面处理,使用洛氏硬度计、扫描电子显微镜、X射线衍射仪和能谱仪对表面改性层进行了表征分析,使用T11高温摩擦磨损试验机对复合处理前后的样品进行了高温摩擦磨损比较试验。结果表明:经激光淬火-离子渗硫复合处理后,在基材表面形成了激光淬火渗硫复合层,具有显著的抗高温摩擦磨损性能。与未处理样品相比较,硬度提高20%左右,摩擦因数降低约10%,磨损失重量减少50%以上。最后对激光淬火渗硫复合层的抗高温摩擦磨损机理进行了探讨分析。
The surface of 42MnCr52 steel was treated by grid laser hardening and low temperature ion desulfurization. The surface modification layer was characterized by using Rockwell hardness tester, scanning electron microscope, X-ray diffraction and energy dispersive spectroscopy. T11 High temperature friction and wear testing machine before and after the composite treatment samples were compared with high temperature friction and wear tests. The results show that the laser quenching and infiltration of sulfur composite layer on the surface of the substrate after laser quenching and ion-sulphurization complex treatment has significant anti-high-temperature friction and wear properties. Compared with the untreated samples, the hardness increased by about 20%, the friction factor decreased by about 10%, the wear loss decreased by 50%. Finally, the mechanism of high temperature friction and wear of laser quenched and infiltrated composite layer was discussed and analyzed.