摘要
在地质灾害多发地区,基于应变的管道设计对管线管提出了大应变的性能要求。通过实验室研究了不同组织类型对管线钢大应变性能的影响,发现多边形铁素体+贝氏体的组织具有很好的大应变性能和其他性能的匹配。更进一步研究了双相比例、组织形态等对大应变性能的具体影响,以及轧钢工艺参数对双相组织的影响。基于该组织设计及实验室研究,宝钢进行了Ф 1 219×26.4 mm厚壁X80大应变UOE管线管的试生产。试制钢管性能良好,能够满足西三线X80大应变管线管的技术要求。
High-strength linepipes need to have high longitudinal deformability to meet the requirements of strain-based design pipelines employed in geologically hazard-prone regions. In this paper, the microstructures with different phases and the effect of the microstructures on the deformability of pipeline steel were studied. It was found that steels with a ferrite and banite dual- phase microstructure have high deformability and other good properties. Moreover, the impacts of dual phase percentage and morphology of microstructures on linepipe deformability, and the impacts of rolling production processes on dual-phase microstructures were also studied. Based on the dual- phase microstructure design and results obtained in the laboratory, X80 grade φl 219 x 26.4 mm heavy wall UOE linepipes with high deformability were industrially trial-produced. The properties of the trial-produced linepipes were good, which met the requirements of the third West-to-East Gas Transmission Pipeline Project.
出处
《宝钢技术》
CAS
2013年第3期45-52,共8页
Baosteel Technology
