基于中薄板坯X90管线钢卷板的研发  

Research and development of X90 pipeline steel coil based on medium-thin slab

作　　者：孔祥磊 刘干 王杨 黄明浩 黄国建 张英慧 KONG Xianglei;LIU Gan;WANG Yang;HUANG Minghao;HUANG Guojian;ZHANG Yinghui(State Key Laboratory of Metal Materials and Application for Marine Equipment,Anshan 114009,China;Iron and Steel Research Institute of Ansteel Group,Anshan 114009,China)

机构地区：[1]海洋装备用金属材料及其应用国家重点实验室,辽宁鞍山114009 [2]鞍钢集团钢铁研究院,辽宁鞍山114009

出　　处：《轧钢》2024年第6期30-36,53,共8页Steel Rolling

摘　　要：结合管线钢技术发展趋势,按照国内外技术标准最新要求,并借鉴大厚壁X80管线钢卷板开发经验,开展了基于中薄板坯生产螺旋焊管用X90管线钢卷板的试验研究。通过Gleeble-3800热模拟试验机完成了X90管线钢动态CCT曲线的测定,获得其相变规律并确定了合适的冷却速率,在此基础上通过对其化学成分设计以及对冶炼、连铸、轧制、冷却工艺进行精细控制,在鞍钢2 150 mm ASP中薄板坯连铸连轧生产线完成了16.3 mm×1 550 mm规格X90管线钢卷板的工业化试制生产,其拉伸性能合格,-20℃冲击功不低于300 J,-20℃冲击剪切面积不低于90%,-20℃DWTT剪切面积不低于90%,金相组织为粒状贝氏体、板条铁素体和弥散分布的M/A组元,各项性能指标均满足工程要求。以螺旋埋弧焊方式制成?1 219 mm×16.3 mm规格钢管,钢管各项性能指标良好。X90管线钢卷板的成功试制,实现了国内中薄板坯生产超高强管线钢的重大突破,对超大直径、更高钢级、更大厚壁管线钢板卷的开发具有重要意义。Combined with the development trend of pipeline steel technology,in accordance with the latest requirements of domestic and foreign technical standards,and drawing on the development experience of large thick-walled X80 pipeline steel coil,the test research was carried out on the production of X90 pipeline steel coils for spiral welded pipes based on medium-thin slabs.The dynamic CCT curve of X90 pipeline steel was determined by the Gleeble-3800 thermal simulation tester,and the phase transformation law was obtained and the appropriate cooling rate was determined.On this basis,through the design of its chemical composition,and the fine control of smelting,continuous casting,rolling and cooling processes,the industrial trial production of 16.3 mm×1550 mm gauge X90 pipeline steel coil was completed in 2150 mm ASP medium thin slab continuous casting and rolling production of Angang.Its tensile properties are qualified,-20℃impact energy is not less than 300 J,-20℃impact shear area is not less than 90%,-20℃DWTT shear area is not less than 90%,the microstructure is granular bainite,lath ferrite and dispersed M/A components,the property indicators meet the engineering requirements.Theø1219 mm×16.3 mm steel pipe is made by spiral submerged arc welding,and the property indexes of the steel pipe are good.The successful trial production of X90 pipeline steel coil has achieved a major breakthrough in the production of ultra-high strength pipeline steel of using medium thin slab in China,which is of great significance for the development of ultra-large diameter,higher steel grade,and thicker walled pipeline steel coil.

关 键 词：中薄板坯 X90管线钢卷板 工业化试制 绿色低碳 

分 类 号：TG1[金属学及工艺—金属学]