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 ℃.
出处
《焊管》
2013年第2期32-34,38,共4页
Welded Pipe and Tube
关键词
大壁厚钢管
海底管道
均匀性
厚度方向
横向
纵向
steel pipe with heavy wall thickness
submarine pipeline
inhomogeneity
thickness direction
transverse
longitudinal
