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.
关键词
调质工艺/28MnCrMoRE/力学性能/显微组织/硫化氢腐蚀
Key words
quenching and tempering process/28MnCrMoRE/mechanical properties/microstructure/hydrogen sulfide corrosion
维普
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