材料期刊网

本文基于对铌微合金化技术的系统研究，对X60管线钢的化学成分进行设计，针对薄板坯连铸连轧生产线的特点，对生产过程的各项工艺参数进行控制，得到了87mm×1538mm的薄铸坯；采取控制轧制和控制冷却技术，轧后得到7.9mm×1538mm的板卷。经检测，生产管线钢组织没有混晶现象，各项力学性能都达到了要求，观察冲击断口，发现延展性韧窝很好，没有分层现象，生产的X60达到了API-5L标准和工程使用要求。

This paper has designed the composition of X60 pipeline steel based on the systematically research of Niobium micro alloy. The 87mm×1538mm thin slab has been obtained by controlling the parameters of FTSR process. In the rolling process, Controlled rolling and controlled cooling technology has been used to get the coil which thickness is 7.9mm.The microstructure of produce pipeline has no duplex grain structure by detection, and the mechanical property are all satisfied with the necessary. By checking out the fracture surface, the ductility dimple has been found and there is no laminate, the production has met the API-5L standard and engineering application.