Development of High Deformation X70 Pipeline Steel Plates in NISCO

摘要：

A series of trial tests for high deformation (HD) X70 pipeline steel plates were performed in NISCO, and the technical routes as thermal mechanical controlled rolling process (TMCP), TMCP+Quenching (Q) and TMCP+Q& tempering (T) were studied systematically through the plate shape quality, properties and microstructure characters. The results show that problems as plate shape and inhomogeneous microstructures are for finish rolling at low temperature and high cooling rate after the rolling by the route of TMCP. By the route of TMCP+Q, the yield strength (YS) of the trial steels is not sufficient. By the route of TMCP+QT, the YS is enhanced, as well as good toughness and plasticity due to the martensite decomposition at low temperature tempering process, and 4 sheets of HD X70 pipeline steel plates by the route TMCP+QT with superior plate shape quality, microstructure and comprehensive properties were successfully developed in NISCO.

关键词： High deformation pipeline steel microstructure TMCP Quenching Tempering

作者: LIU Zhao-xia LI Xiao-ling CHEN Yuan-shu SONG Shi-jia

作者单位: Technology & Quality Department，Jiangsu Nanjing Iron and Steel Cooperation, Jiangsu 210035,China

会议类型: 国际会议

会议名称: The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)

会议地点: 北京

会议语种:英文

页码: 490-494

在线出版日期: 2011-05-31（万方平台首次上网日期，不代表论文的发表时间）