焊管2018，Vol.41Issue(2)：1-6,6.DOI:10.19291/j.cnki.1001-3938.2018.02.001
深海用X70高强度厚壁管线钢及焊管的开发
Development of X70 High Strength Thick Wall Pipeline Steel and Welded Pipe for Deep Sea
摘要
Abstract
In order to ensure the reliability service of deep-sea oil and gas pipeline steel pipe, aiming at the requirement of deep-sea pipeline performance,the X70 grade wall thickness 40.5 mm high strength deep-sea pipeline steel with high strength,strong toughness at low temperature and good welding performance was developed through composition design with low C,Nb,Ti micro alloying and composite additions of Ni,Mo and other alloy elements and pipeline steel reasonable thermal mechanical control process(TMCP). The X70 gradeΦ762 mm×40.5 mm deep sea pipeline steel pipe with high strength,large wall thickness and small diameter to thickness ratio (D/t) was developed. The test results show that the strength,toughness and hardness of the test steel pipe meet the relevant technical requirements,and had good plastic deformation ability and low temperature toughness.关键词
管线钢/焊管/深海管线/高强度/厚壁Key words
pipeline steel/welded pipe/deep-sea pipeline/high strength/heavy wall thickness分类
矿业与冶金引用本文复制引用
牛辉,牛爱军,刘海璋,黄晓辉..深海用X70高强度厚壁管线钢及焊管的开发[J].焊管,2018,41(2):1-6,6.基金项目
国家高技术研究发展计划(863)项目"深海高压油气输运高强厚壁管材关键技术研究"(项目编号2013AA09A219). （863）
