Study on Performances of Special Oil Well Pipe Resistant to Hydrogen Sulfide Corrosion
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.
quenching and tempering process28MnCrMoREmechanical propertiesmicrostructurehydrogen sulfide corrosion
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