Microstructure and Mechanical Properties of V-N Microalloyed X80 High Deformability Pipeline Steel

被引：0

作者：

Wang M.-M. ^{[1
]}

Gao X.-H. ^{[1
]}

Du L.-X. ^{[1
]}

Zhang D.-Z. ^{[1
]}

机构：

[1] State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2020年 / 41卷 / 06期

关键词：

High deformability; Mechanical property; Microstructure; Pipeline steel; V-N microalloying;

D O I：

10.12068/j.issn.1005-3026.2020.06.007

中图分类号：

学科分类号：

摘要：

The dynamic continuous cooling transformation behavior of undercooled austenite in a V-N microalloyed steel was studied by means of thermal simulation test machine. Furthermore, the rolling and cooling process parameters of V-N microalloyed X80 high deformability pipeline steel were designed and the relationship between microstructure and mechanical properties was analyzed. The dynamic CCT curve shows a separation of high temperature transformation region and intermediate temperature transformation region, and the transformation ranges are 637~728℃ and 441~601℃, respectively. When the cooling rate is in the range of 10~20℃/s, the microstructure mainly consists of acicular ferrite. The microstructure of V-N microalloyed pipeline steel is dominated bypolygonal ferrite and acicular ferrite. Yield strength, tensile strength, uniform elongation and -20℃ Charpy impact energy are 603 MPa, 724 MPa, 11.1% and 214 J, respectively. These meet the requirements of X80 pipeline steels according to the API Spec 5L specification that the produced pipeline steel should have a good combination of strength and ductility. © 2020, Editorial Department of Journal of Northeastern University. All right reserved.

引用

页码：801 / 806

页数：5

共 16 条

[1]

Wang B X, Lian J B., Effect of microstructure on low-temperature toughness of a low carbon Nb-V-Ti microalloyed pipeline steel[J], Materials Science and Engineering:A, 592, pp. 50-56, (2014)

[2]

Jia Shu-jun, Liu Qing-you, Li Ba, Microstructure and mechanical properties of thick wall X70 pipeline steel, Transactions of Materials and Heat Treatment, 37, 4, pp. 129-134, (2016)

[3]

Wang S Y, Yu H, Zhou T, Et al., Effects of non-recrystallization zone reduction on microstructure and precipitation behavior of a ferrite-bainite dual phase steel, Materials and Design, 88, pp. 847-853, (2015)

[4]

Hu J, Du L X, Xie H, Et al., Microstructure and mechanical properties of TMCP heavy plate microalloyed steel, Materials Science and Engineering:A, 607, pp. 122-131, (2014)

[5]

Turk A, Martin D S, Rivera-Diaz-del-Castillo P E J, Et al., Correlation between vanadium carbide size and hydrogen trapping in ferritic steel, Scripta Materialia, 152, pp. 112-116, (2018)

[6]

Lagneborg R, Siwecki T, Zajac S, Et al., The role of vanadium in microalloyed steels[J], The Scandinavian Journal of Metallurgy, 28, 5, pp. 186-241, (1999)

[7]

Hu J, Du L X, Wang J J, Et al., Structure-mechanical property relationship in low carbon microalloyed steel plate processed using controlled rolling and two-stage continuous cooling, Materials Science and Engineering:A, 585, pp. 197-204, (2013)

[8]

Mukherjee S, Timokhina I, Zhu C, Et al., Clustering and precipitation processes in a ferritic titanium-molybdenum microalloyed steel, Journal of Alloys and Compounds, 690, pp. 621-632, (2017)

[9]

Nayak S S, Misra R D K, Hartmann J, Et al., Microstructure and properties of low manganese and niobium containing HIC pipeline steel, Materials Science and Engineering:A, 494, pp. 456-463, (2008)

[10]

Mazaheri Y, Kermanpur A, Najafizadeh A., A novel route for development of ultrahigh strength dual phase steels, Materials Science and Engineering:A, 619, pp. 1-11, (2014)

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