【摘要】 X120管线钢的碳含量一般为0.05%,(Cu+Ni+Cr+Mo)≤2%,并加入微合金化元素V、Nb、Ti、B。通过控轧和强控冷工艺,该钢具有高强度、高韧性和良好的焊接性。介绍了生产X120管线钢的在线热处理工艺装置JFE-HOP,间断直接淬火(IDQ),直接淬火DQ-T工艺和淬火-配分(Q&P)工艺技术。讨论了其存在问题和可能的发展方向。更多还原

【Abstract】 Generally speaking,the carbon content in X120 pipeline steel is 0.05%,and(Cu+Ni+Cr+Mo) content in steel≤2%with adding microalloying elements V,Nb,Ti,B.The steel has high strength,high toughness and nice weldability by control rolling and heavy accelerated cooling process.The in-line heat treatment process device JFE-HOP, the interrupted direct quenching(IDQ) process,the direct quenching DQ-T process and the quenching & partitioning (Q&P) technology for production of pipeline steel X120 are presented,and the possible existed problem and future development are discussed.更多还原