抗硫化氢腐蚀专用油井管性能研究

Study on Performances of Special Oil Well Pipe Resistant to Hydrogen Sulfide Corrosion

文章对比研究了热轧态钢管和调质态钢管在显微组织、力学性能和抗硫化氢应力腐蚀性能上的差异。研究结果表明,热轧态钢管显微组织为贝氏体、马氏体及少量铁素体和珠光体,抗拉强度满足技术协议要求,但延伸率接近技术协议要求下限;调质态钢管显微组织为回火索氏体,与热轧态钢管相比强韧性及延展性明显改善,0℃冲击功是技术协议要求下限的2.5倍以上,同时具有良好的抗硫化氢应力腐蚀能力。

In this paper,the differences of microstructure,mechanical properties and resistance to hydrogen sulfide stress corrosion between as-hot-rolled steel pipe and quenched and tempered steel pipe are compared and studied.The study results showed that the microstructure of as-hot-rolled steel pipe consisted of bainite,martensite as well as a small amount of ferrite and pearlite,its tensile strength could meet the requirements of technical agreement,but elongation was close to lower limit of the requirements of technical agreement;the microstructure of quenched and tempered steel pipe was tempered sorbite,strength and toughness and ductility were significantly improved compared with those of as-hot-rolled steel pipe,impact energy at 0℃was over 2.5 times of lower limit for the requirements of technical agreement as well as it is with good resistance to hydrogen sulfide stress corrosion.