Abstract:According to the technical requirements of X80 heavy thickness plates for the second westtoeast natural gas transmission pipeline project and the capability of steelmaking and plate mill of Shagang, a HTP chemical design of low carbon and high niobium was adopted and the OHTP of control rolling and cooling for plates was developed. A mass production of 22 mm thickness of X80 plate and manufacturing of LSAW JCOE pipes of 22 mm×1219 mm were carried out. The results show that the mechanical properties, DWTT properties at -15 ℃ of plates and the yield/tensile ratio of the pipes were significantly improved by comparing that of HTP X80 plates. The absorb energy of Charpy Vnotch impact test at -80 ℃ remains at its top platform above 270 J, the 50% FATT is below -100 ℃. At -30 ℃, the DWTT fracture shear area is 90%, and 85% DWTT value is at -34 ℃.
聂文金;王志福;李冉;李玉藏;张晓兵. 采用OHTP工艺生产西气东输二线用22 mm厚X80钢板[J]. 钢铁, 2009, 44(8): 76-0.
NIE Wenjin;WANG Zhifu;LI Ran;LI Yucang;ZHANG Xiaobing. mm Thickness of X80 Plates Production for the Second WesttoEast Natural Gas Transmission Pipeline by Using OHTP. Iron and Steel, 2009, 44(8): 76-0.