Process Control and Microstructure and Properties of High Grade Pipeline Steel on 2250 Hot Strip Rolling Line
TANG Xing-chang， BO Yan-yan， CHEN Jian-xin， LIAO Zhi， KANG Yong-lin
1. State Key Laboratory for Advanced Metals and Materials， School of Materials Science and Engineering， University of Science and Technology Beijing， Beijing 100083， China;
2. Valin Lianyuan Iron and Steel Co.， Ltd.， Loudi 417009， Hu'nan， China
The article introduces composition design and process control of X80 pipeline steel produced by 2250 hot strip rolling production line. Mechanical properties, Microstructure and precipitation behavior of X80 pipeline steel were studied. The results indicate that X80 pipeline steel with a thickness of 18.4mm produced by 2250 hot continuous rolling line shows excellent mechanical properties, with an average yield strength of 655MPa and an average tensile strength of 750MPa. The average impact energy is 300J at -20℃, while the average percentage of DWTT shear area is 95%. It is observed that the microstructure of X80 pipeline steel is mainly granular bainite and acicular ferrite. The precipitation distributes homogeneously, with an average length of 20nm.
唐兴昌， 薄艳艳， 陈建新， 廖志， 康永林. 2250热连轧生产高级别管线钢的工艺控制与组织性能[J]. 中国冶金, 2012, 22(9): 15-19.
TANG Xing-chang， BO Yan-yan， CHEN Jian-xin， LIAO Zhi， KANG Yong-lin. Process Control and Microstructure and Properties of High Grade Pipeline Steel on 2250 Hot Strip Rolling Line. China Metallurgy, 2012, 22(9): 15-19.
2012, Vol. 22 
