材料期刊网

回顾总结了近年来国际上高等级管线钢的发展。现代管线钢向高强度、大厚度、抗应变和抗HIC方向发展。为降低长距离天然气管线的建设成本，开发了X100和X120超高强度管线管，并进行了X100和X120管线试验段建设，取得了显著的进展。开发了以双相显微组织为特征的满足“基于应变设计”的抗大应变高强度管线钢，强度等级从X65至X100，可应用于冻土带、地震区和水土流失区域的管线建设。海底管线用钢和抗HIC管线管的强度等级已从以往的X65提高到X70，X70管线管的最大壁厚可达34.1 mm，并已批量在工程中应用。新型的HTP高强度管线钢采用超低碳高铌含铬的成分设计，具有十分优良的性能，用铬替代钼可显著地降低成本，生产的X80管线管已应用于美国第一条X80管线。

The development of high performance pipeline steel in recent years in the world is reviewed. The modern high performance pipeline steel has been developing for high strength, heavy wall, high deformability and HICresistance. For the investment reduction of long distance natural gas pipeline project, the X100 and X120 grades ultrahigh strength pipeline steels were developed and the demonstration pipeline lines of X100 and X120 were successfully constructed. Based on “strainbased design”, high deformability grade X65X100 high strength pipeline steel with dualphase microstructure were developed, which can be laid in seismic region, cold region and soil and water loss region. The steel grade for offshore pipeline and HICresistance pipeline has been stepped from X65 to X70, and the X70 pipes with a wall thickness up to 34 mm have been applied in offshore pipeline project. The new ultralow carbon, high niobium and chromium high strength pipeline steel X80 produced by HTP has high performance and lower cost by using chromium instead of molybdenum which were used in the X80 pipeline project in USA.