摘要
为降低管线钢生产成本,替代传统C-Mn-Mo-Nb合金系,采用无钼C-Mn-Cr-Nb系针状铁素体组织,同时结合纯净钢冶炼连铸工艺、热装轧制工艺和热机械轧制工艺等技术,鞍钢在2150ASP中薄板坯连铸坯连铸连轧生产线上研制开发出厚14.6 mm和15.9 mm的经济型X70管线钢热轧卷板。产品组织均匀,铁素体晶粒细小,具有高强度、良好的低温韧性和焊接性能,用其制成的螺旋埋弧焊管应用于西气东输二线和中亚输气等国家重点管道工程。
In order to reduce the production cost,economic-type X70 pipeline steels with the thickness of 14.6 and 15.9mm were developed in 2150ASP medium-thin slab continuous casting and rolling production line in Angang Steel Company Limited.The latest alloy-system of pipeline steel designed by non-molybdenum C-Mn-Cr-Nb alloy-system,which replaces the high-molybdenum C-Mn-Mo-Nb alloy system,was adopted along with acicular ferrite microstructure.The microstructure of X70 strip is homogeneous and ferrite grains are fine,resulting in high strength,excellent low-temperature toughness and weldability.The pipes made from X70 strip produced by Ansteel have been applied into state key pipeline projects in China,such as ＂West-East Ⅱnatural gas transmission project＂ and ＂Central Asia natural gas transmission project＂.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2010年第5期51-54,共4页
Journal of Iron and Steel Research
关键词
管线钢
针状铁素体组织
X70
热轧卷板
pipeline steel
acicular ferrite microstructure
X70
hot strip
