研究了20CrMnTi钢经碳氮共渗与磁化电解渗硫复合处理后的摩擦磨损性能, 利用扫描电镜、电子探针和硬度仪观察分析了试样经不同时间磨损后的表面形貌和硬度变化, 并与碳氮共渗、碳氮共渗后低温电解渗硫复合处理的进行了对比。结果表明: 碳氮共渗与磁化电解渗硫复合处理后试样的摩擦因数、磨损量和磨损速率均最小, 碳氮共渗后低温电解渗硫的次之, 而碳氮共渗的均最大; 与碳氮共渗相比, 碳氮共渗与磁化电解渗硫复合处理后试样的磨损量可减少近50%, 摩擦因数仅为它的1/3~1/5, 显示了良好的减摩性及耐磨性能, 且磨损前后表面硬度基本不变; 三种工艺处理后试样的磨损机理基本相同, 由短时间的麻点剥落向长时间的深层剥落转化, 属于表面疲劳磨损, 伴随有粘着磨损。

The properties of friction and wear of 20CrMnTi steel treated by carbonitriding and magnetizing electrolytic sulfurizing were studied. Using scanning electron microscopy, electron probe and X-ray diffraction, the surface morphology and micro-hardness of the samples being worn for different times were analyzed, and were compared with those of the samples treated by carbonitriding, and combined treatment of carbonitriding and low-temperature electrolytic sulphurizing. Results show that the friction coefficient, wear loss and wear rate of the samples treated by carbonitriding and magnetizing electrolytic sulphurizing have the smallest value, followed by the samples treated by carbonitriding and low-temperature electrolytic sulphurizing, then the carbonitrided samples. The wear loss of the samples treated by carbonitriding and magnetizing electrolytic sulphurizing reduces by 50%, and the friction coefficient is 1/3-1/5, compared to the carbonitrided samples, showing excellent wear resistance and friction-reduction behavior. And its micro-hardness has no change before and after wear process. The wear mechanism is similar for the test steel treated by three processes, which changes from pitting flake for a short period of time to long deep spalling, and belongs to surface fatigue wear mixed with some adhesive wear.