大壁厚海底管道用X65钢管性能均匀性研究  

Research on Inhomogeneity of X65 Steel Pipes Used for Submarine Pipeline with Heavy Wall Thickness

作　　者：杜伟[1,2] 张京兵 魏亚秋[1,2] 王耀光[1,2] 

机构地区：[1]中国石油集团石油管工程技术研究院,西安710065 [2]北京隆盛泰科石油管科技有限公司,北京100101 [3]中石油西南管道公司规划计划处,成都610000

出　　处：《焊管》2013年第2期32-34,38,共4页Welded Pipe and Tube

摘　　要：研究分析了大壁厚海底管道用X65钢管组织及性能的均匀性。结果表明:钢管表面及壁厚中心组织基本相同;壁厚中心处的母材强度、冲击韧性及硬度均低于表面,其中屈服强度低4MPa,冲击韧性低70J,硬度低10HV10;不同方向上,钢管横向屈服强度及抗拉强度均高于纵向;冲击韧性比较,在-20℃以上横向与纵向冲击功十分相近,而在-60℃以下纵向冲击功高于横向冲击功。The microstructure and performance inhomogeneity of X65 steel pipes used for submarine pipeline with heavy wall thickness were studied.The results showed that the pipe microstructure of surface and thickness center is similar, the strength, impact toughness and hardness of thickness center are lower than those of surface, in which yield strength is lower 4 MPa, impact toughness lower 70 J, and hardness lower 10 HV10. The comparison results in different direction showed that transverse yield strength and tensile strength are higher than those of the longitudinal. The transverse and longitudinal impact toughness are close at -20 ℃ and above, and the longitudinal impact toughness is higher than that of transverse below --60 ℃.

关 键 词：大壁厚钢管 海底管道 均匀性 厚度方向 横向 纵向 

分 类 号：TG142[一般工业技术—材料科学与工程]