摘要
采用低碳中锰微合金设计、洁净化炼钢和TMCP控轧控冷技术,设计出了低温性能优异的X60M钢级热轧卷板,卷板微观组织为细长扁平的多边形铁素体(PF)+少量珠光体(P);经过优化HFW钢管成型焊接工艺,开发出X60M钢级超临界二氧化碳输送用Φ323.9 mm×10 mm HFW钢管,并对其进行了低温冲击韧性、抗拉强度、硬度检测及压扁试验和静水压爆破试验。结果表明,该管材具有较高的强塑性和强韧性,其焊缝强度不低于管体;在-45℃条件下,该钢管焊缝冲击功为293~351 J,热影响区冲击功为219~315 J,管体冲击功为248~342 J,所有试样剪切面积100%。当试验温度降到-75℃,该钢管焊缝、热影响区及母材冲击功平均值均在204~350 J范围内,剪切面积为85%~100%,表现出优异的低温韧性。开发管材的以上性能完全满足超临界二氧化碳输送管道设计要求和安全输送服役要求。
Adopting low⁃carbon medium⁃manganese microalloy design,clean purification steel making,and TMCP controlled rolling and cooling technology,X60M steel grade hot rolled coil plates with excellent low⁃temperature performance have been developed.The microstructure of the coil plates is elongated that have flat polygonal ferrite(PF)and a small amount of pearlite(P).After optimizing HFW steel pipe forming and welding process,X60M gradeΦ323.9 mm×10 mm HFW steel pipe for supercritical carbon dioxide conveying has been developed.The low temperature impact toughness,tensile strength,hardness,flattening and hydrostatic blasting tests are carried out.The test results show the pipe has high strong plasticity and toughness,and the weld strength is not lower than the pipe body.At-45℃,the impact energy of the steel pipe weld seam is 293~351 J,the impact energy of the heat affected zone is 219~315 J,and the impact energy of the pipe body is 248~342 J.All specimens have a shear area of 100%.When the test temperature drops to-75℃,the average impact energy of the weld seam,heat affected zone,and base metal of the steel pipe is within the range of 204~350 J,and the shear area is 85%~100%,showing excellent low temperature toughness.The performace above can fully meets the design requirements of supercritical carbon dioxide pipeline and the requirements for safe transportation and service.
作者
毕宗岳
黄晓辉
李银山
韦奉
卿俊杰
王磊
范才强
芦琳
BI Zongyue;HUANG Xiaohui;LI Yinshan;WEI Feng;QING Junjie;WANG Lei;FAN Caiqiang;LU Lin(Chinese National Engineering Research Center for Petroleum and Natural Gas Tubular Goods Co.,Ltd.,Xi'an 710018,China;CNPC Baoji Petroleum Steel Pipe Co.,Ltd.,Baoji 721008,Shaanxi,China;Baoji BSG OCTG Co.,Ltd.,Baoji 721008,Shaanxi,China)
出处
《焊管》
2023年第10期43-48,共6页
Welded Pipe and Tube
基金
中国石油天然气股份有限公司重大科技项目“超临界二氧化碳长距离管道关键技术研究”(项目编号2021ZZ01-02)。
关键词
超临界二氧化碳输送
X60M
HFW钢管
低温韧性
supercritical carbon dioxide transportation
X60M
HFW steel pipe
low temperature toughness
