1.State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114009 Liaoning, China；2. An-shan Iron and Steel Institute, Anshan 114009, Liaoning, China
Abstract：Abstract：LCSM and electrochemical workstation were used to investigate microstructure and hydrogen diffusion properties of oil well pipes. TEM was used to investigate precipitation phase and dislocations of oil well pipes. The results show that the microstructure of the oil well pipe is tempered soxhlet, microstructure and state of hydrogen trap of oil well pipes change by being treated with quenching and tempering treatment, then, hydrogen diffusion coefficient changes. As the number of quenching and tempering increases, the intensity increases first and then decreases, and the hydrogen diffusion coefficient increases slowly first, and then increases exponentially. After being treated with quenching and tempering treatment twice, the interaction between highdensity dislocations and dispersed precipitated phase is strong，the shortcircuit diffusion composed of dislocations and grain boundary is the main path of hydrogen diffusion. After being treated with quenching and tempering treatment three times, the density of dislocations and the amount of precipitated phase decrease, the shortcircuit diffusion could not work, and the diffusion along the interior of the crystalline grain is the main path of hydrogen diffusion. After being treated with quenching and tempering treatment twice, the oil well pipes show the characteristics of uniform structure, small crystalline grain, highdensity dislocation and fine and diffuse precipitation phase，it means that the oil well pipes have the best mechanical properties and low hydrogen diffusion coefficient.
钟彬1,2，陈义庆1,2，高鹏1,2，吕家舜2，李琳1,2，伞宏宇1,2. 微观组织和氢陷阱对抗硫管氢扩散系数的影响[J]. 钢铁研究学报, 2020, 32(1): 81-87.
ZHONG Bin1,2,CHEN Yi-qing1,2,GAO Peng1,2,LV Jia-shun2,LI Lin1,2,SAN Hong-yu1,2. Effects of microstructure and hydrogen trap on hydrogen diffusion coefficient of sulfurresistant tube. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(1): 81-87.
2020, Vol. 32 
