钢管2026，Vol.55Issue(2)：30-36,7.DOI:10.19938/j.steelpipe.1001-2311.2026.2.30.36
抗大变形厚壁X80M直缝埋弧焊钢管的组织及性能
Microstructure and Properties of X80M Large-deformation Resistant Heavy-wall SAWL Steel Pipe
何小东 1张洪杰 1张永青 2陈越峰 1HAN David3
作者信息
- 1. 中国石油集团工程材料研究院有限公司·油气钻采输送装备全国重点实验室,陕西西安 710077||国际焊接研究中心,陕西西安 710077
- 2. 国际焊接研究中心,陕西西安 710077||中信金属股份有限公司,北京 100004
- 3. 国际焊接研究中心,陕西西安 710077
- 折叠
摘要
Abstract
Aiming at the Φ1 219 mm×33.0 mm X80M large-deformation resistant SAWL steel pipe with 0.075％niobium content,the chemical composition and microstructure uniformity at different positions through the wall thickness of steel pipes with two different bainite/ferrite phase ratios are analyzed,and the strength and toughness of the pipe bodies with the two microstructure morphologies are compared.The results demonstrate that the alloying design with relatively high niobium content and adopting reasonable rolling process can achieve uniform chemical composition through the wall thickness,and reduce the differences in microstructure and properties at different positions;a reasonable phase ratio of bainite-ferrite dual-phase microstructure is the key to ensuring the longitudinal tensile properties of the bodies of the said X80M large-deformation resistant pipes;the pipe body dominated by bainite exhibits higher Charpy impact absorbed energy,but lower uniform elongation,while the one dominated by ferrite possesses better uniform elongation and DWTT performance,and a rather lower ductile-brittle transition temperature(DBTT).关键词
SAWL钢管/X80M/抗大变形/双相组织/性能Key words
SAWL steel pipe/X80M/large deformation resistance/dual-phase microstructure/properties引用本文复制引用
何小东,张洪杰,张永青,陈越峰,HAN David..抗大变形厚壁X80M直缝埋弧焊钢管的组织及性能[J].钢管,2026,55(2):30-36,7.
