冯涛,刘斌,王引真,杨青霖,刘俊.独立阳极对石油钻杆内壁离子渗氮过程的影响[J].表面技术,2019,48(5):65-71.
FENG Tao,LIU Bin,WANG Yin-zhen,YANG Qing-lin,LIU Jun.Effect of Independent Anode on Ion-nitriding Process of Oil Drill Pipe Inner Wall[J].Surface Technology,2019,48(5):65-71 |
| 独立阳极对石油钻杆内壁离子渗氮过程的影响 |
| Effect of Independent Anode on Ion-nitriding Process of Oil Drill Pipe Inner Wall |
| 投稿时间：2018-12-20 修订日期：2019-05-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.05.010 |
| 中文关键词: 石油钻杆 内壁离子渗氮 独立阳极 硬度 耐磨性 耐蚀性 |
| 英文关键词:oil drill pipe inner wall ion-nitriding independent anode hardness wear resistance corrosion resistant |
| 基金项目: |
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| Author | Institution |
| FENG Tao | School of Materials Science and Engineering, China University of Petroleum, Qingdao 266580, China |
| LIU Bin | School of Materials Science and Engineering, China University of Petroleum, Qingdao 266580, China |
| WANG Yin-zhen | School of Materials Science and Engineering, China University of Petroleum, Qingdao 266580, China |
| YANG Qing-lin | School of Materials Science and Engineering, China University of Petroleum, Qingdao 266580, China |
| LIU Jun | School of Materials Science and Engineering, China University of Petroleum, Qingdao 266580, China |
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| 中文摘要: |
| 目的 利用脉冲离子渗氮提高石油钻杆内壁性能。方法 在钻杆内部插入独立阳极，利用钻杆内部空腔作为渗氮炉体，完成钻杆内壁离子渗氮。通过测定渗氮过程的温度分布并对渗层的硬度分布、耐蚀性及耐磨性能进行测定，分析独立阳极对钻杆内壁渗氮过程、渗层显微组织、耐磨耐蚀性能的影响。结果 采用L1700长阳极时的温度场比采用L600短阳极均匀。采用L600短阳极时，随距阳极距离的增加，渗层厚度减小。采用L1700贯穿长棒时，渗层形貌和厚度呈对称分布，渗氮层的显微硬度由表及里逐渐降低。两种不同阳极相比，L1700硬度变化更平缓。盐雾腐蚀及摩擦磨损试验表明，采用L600短阳极时，随着距离的增大，性能下降，而采用L1700长阳极时，性能呈对称分布，中间位置性能最低。结论 采用内置独立阳极的方法可以实现钻杆内壁离子渗氮，独立阳极的影响范围约为260 mm。采用L1700长阳极渗氮后，表层最高硬度可达848.0HV0.2，渗层最小厚度0.33 mm。L1700试样腐蚀速率最大为1.6917×10−5 g/(mm2·h)，磨损率最大为1.5513×10-7 mm3/(N·m)。 |
| 英文摘要: |
| The work aims to improve the performance of the inner wall of oil drill pipe by pulsed ion-nitriding. An inde-pendent anode was inserted into the oil drill pipe, and the inner cavity of the drill pipe was used as the nitriding furnace to complete the ion-nitriding on the inner wall of the drill pipe. By measuring the temperature distribution of the nitriding process, hardness distribution, corrosion resistance and friction and wear properties on the cementation layer were determined and the influence of the independent anode size on the nitriding process of the drill pipe inner wall, the microstructure of the cementation layer, and the wear resistance and corrosion resistance of the drill pipe was analyzed. The temperature field of L1700 anode was more uniform than that of L600 anode. When L600 anode was used, the thickness of infiltration layer decreased with the increasing distance from anode. When L1700 anode was used, the morphology and thickness of infiltration layer were distributed symmetrically. After nitriding, the micro-hardness of nitriding layer decreased gradually from the surface to the inside. By comparing the two different anodes, the hardness of L1700 changed more slowly. Salt spray corrosion and friction and wear tests showed that when L600 anode was used, the performance decreased with the increase of distance, while when L1700 anode was used, the performance was symmetrically distributed, with the lowest performance at the middle position. The inner wall of drill pipe can be nitrided by the method of built-in independent anode. The influence range of independent anode is about 260 mm. With L1700 anode for nitriding, the maximum surface hardness can reach 848.0HV0.2, and the minimum thickness of the layer is 0.33 mm. The corrosion test shows that the maximum corrosion rate of L1700 sample is 1.6917×10−5 g/(mm2·h), and the maximum wear rate is 1.5513×10-7 mm3/(N·m). |
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