RESEARCH AND DEVELOPMENT OF ULTRA-HIGH STRENGTH X100 WELDED PIPE
Ultra-high strength X100 welded pipe can be used in the construction of long distance oil and gas pipeline to improve transmission capacity and reduce operation cost.By using the way of thermo-simulation and pilot rolling,the CCT(Continuous Cooling Transformation)diagram and the relationship between ACC(Accelerated Cooling)parameters,microstructure and mechanical properties were studied for the designed X100 pipeline steel with low carbon,high manganese and niobium micro-alloyed composition in lab.The analysis of CCT diagram indicates that the suitable hardness and microstructure can be obtained in the cooling rate of 20~80℃/sec.The pilot rolling results show that the ACC cooling start temperature below Ar3 phase transformation point is beneficial to increase uniform elongation,and the cooling stop temperature of 150~350℃ is helpful to obtain high strength and toughness combination.Based on the research conclusions,the X100 plate and UOE pipe with dimension in O.D.1219×W.T.14.8mm,O.D.1219×W.T.17.8mm,designed for the natural gas transmission pipeline,were trial produced.The manufactured pipe body impact absorbed energy at-10℃ is over 250J.The DWTT shear area ratio at 0℃ is over 85%.The transverse strength meets the X100 grade requirement,and uniform elongation is over 4%.The X100 plate and UOE pipe with dimension in O.D.711×W.T.20.0mm,O.D.711×W.T.12.5mm,designed for an offshore engineering,were also trial produced.The average impact absorbed energy of pipe body at-30℃ is over 200J.The average impact absorbed energy of HAZ(Heat-affected zone)and WM(Welded Seam)at-30℃ is over 100J.And the good pipe shapes were obtained.
X100 Microstructure and Properties UOE Micro alloying
Zhang Chuanguo Zheng Lei Hu Ping Zhang Bei Wu Kougen Huang Weifeng
SHU(Shanghai University)99 Shang Da Rd Bao Shan District,Shang Hai,200072,China;BAOSTEEL(Baoshan Iro BAOSTEEL(Baoshan Iron & Steel Co,Ltd.)885 Fu Jin Rd Bao Shan District,Shang Hai,201900,China
国际会议
Energy Materials 2014(第一届能源材料国际会议)
西安
英文
613-621
2014-11-04（万方平台首次上网日期，不代表论文的发表时间）