| 摘要: |
| 为了同时减少钻杆接头和对磨套管的磨损，采用超声表面加工技术和硫氮共渗技术对钻杆接头材料35CrMo钢进行复合处理。利用光学三维形貌仪、扫描电子显微镜、EDS能谱仪、显微硬度计和X射线衍射仪分别研究了试样的表面形貌、粗糙度、成分、硬度和相结构，并在水基钻井液润滑条件下采用环块磨损试验机考察了35CrMo钢和套管对磨副的磨损性能。结果表明，超声表面加工可以使35CrMo钢和硫氮共渗复合处理改性层的表面粗糙度均显著降低，进一步提高硫氮共渗改性层硬度，显著改善35CrMo钢的耐磨性能，并使对磨副套管的磨损率明显降低，钻杆接头和套管的磨损表面形貌也得到显著改善。 |
| 关键词: 超声表面加工 硫氮共渗 35CrMo钢 钻杆接头 磨损性能 |
| DOI：10.11933/j.issn.1007-9289.2016.01.015 |
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| Influences of Ultrasonic Surface Processing and Nitriding-Sulphurizing Treatments on Surface Properties of 35CrMo Steel |
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TIAN Bin, YUE Wen1,2
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1. School of Materials Science and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048;2. School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083
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| Abstract: |
| To reduce the wear of both drilling pipe joints and casing pipes, 35CrMo steel used in drilling pipe joints was successively treated by ultrasonic surface processing and nitridingsulphurizing treatment. Surface morphology, roughness, composition, hardness, and phase structure, were characterized by optical profilometer, scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), microhardness tester, and Xray diffraction (XRD). The wear properties of 35CrMo drilling pipe joints and casing pipes were evaluated on a ringblock wear tester under lubrication with waterbased drilling fluid. The results show that the ultrasonic surface processing can remarkably reduce the surface roughness of 35CrMo samples both with and without sulfurnitrade treatments. The samples with both the surface nanocrystallization and nitridingsulphurizing treatments have higher surface hardness, obviously improve the antiwear properties of 35CrMo steel, and lower the wear rates of the casing pipe samples. At the same time, worn surface morphologies of both drilling pipe joints and casing pipes are evidently improved. |
| Key words: ultrasonic surface processing nitriding and sulphurizing 35CrMo steel drilling pipe joints wear properties |
