Microstructures and Properties of X100 Pipeline Steel Joints by Fiber Laser Welding

被引：0

作者：

Guo P. ^{[1
,2
]}

Wang X. ^{[2
]}

Zhu G. ^{[1
,2
]}

Zhao Y. ^{[3
]}

Zhang M. ^{[4
]}

Chen C. ^{[4
]}

机构：

[1] School of Metallurgy and Engineering, Anhui University of Technology, Maanshan, 243002, Anhui

[2] School of Iron and Steel, Soochow University, Suzhou, 215002, Jiangsu

[3] Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, Guangxi University, Nanning, 530004, Guangxi

[4] School of Mechanical and Electric Engineering, Soochow University, Suzhou, 215021, Jiangsu

来源：

Wang, Xiaonan (wxn@suda.edu.cn) | 2017年 / Science Press卷 / 44期

关键词：

Laser technique; Laser welding; Mechanical properties; Microalloyed steel; Microstructure;

D O I：

10.3788/CJL201744.1202003

中图分类号：

学科分类号：

摘要：

With the experiment of laser welding of X100 pipeline steels, the influence of heat input on the microstructure and hardness of welded joints is studied, and the mechanical properties of typical samples with full penetration are analyzed. The study results show that the full penetration welds can be obtained when the heat input reaches 1.5 kJ·cm-1 and the corresponding welding width and heat-affected zone width reach 1.8 mm and 1.0 mm, respectively. In a certain range of heat inputs, the influence of heat input on the microstructures of welded joints in each micro-area is not obvious. The microhardnesses of the weld zone, the coarse grain zone and the fine grain zone are all higher than that of the base metal, while the microhardness of the mixed zone is lower than that of the base metal. The tensile fracture occurs in the base metal. The impact energy of welded joints with full penetration reaches the level of the base metal, and the impact energy of the heat affected zone reaches 66% of that of the base metal, all of which are typical ductile fractures. © 2017, Chinese Lasers Press. All right reserved.

引用

共 14 条

[1] Lei Z.L., Tan C.W., Chen Y.B., Et al., Microstructure and mechanical properties of fiber laser-metal active gas hybrid weld of X80 pipeline steel, Journal of Pressure Vessel Technology, 135, 1, (2013)
[2] Yang Y., Shang C.J., Nie W.J., Et al., Investigation on the microstructure and toughness of coarse grained heat affected zone in X-100 multi-phase pipeline steel with high Nb content, Materials Science and Engineering A, 558, pp. 692-701, (2012)
[3] Li J., Yang L., Zhang M., Microstructure and property of X100 pipeline steel welded joint, Materials for Mechanical Engineering, 38, 2, pp. 59-62, (2014)
[4] Hu M., Qu T., Wang Y., Et al., Analysis on welded joint properties of X100 SAW line pipe, Welded Pipe and Tube, 35, 4, pp. 20-23, (2012)
[5] Chang Z., Huo X., Qiu C., Et al., Microstructure and properties of CO<sub>2</sub> arc weld joints for ultralow-carbon microalloyed X100 pipeline steel, Iron and Steel, 49, 12, pp. 76-79, (2014)
[6] Quintino L., Costa A., Miranda R., Et al., Welding with high power fiber lasers-A preliminary study, Materials & Design, 28, 4, pp. 1231-1237, (2007)
[7] Miranda R., Costa A., Quintino L., Et al., Characterization of fiber laser welds in X100 pipeline steel, Materials & Design, 30, 7, pp. 2701-2707, (2009)
[8] Vollertsen F., Grunenwald S., Rethmeier M., Et al., Welding thick steel plates with fibre lasers and GMAW, Welding in the World, 54, 3-4, pp. R62-R70, (2010)
[9] Hu L., Huang J., Li Z., Et al., Microstructure and properties of high power CO<sub>2</sub> laser welded pipeline steel, Chinese J Lasers, 36, 12, pp. 3174-3178, (2009)
[10] Niu J., Physical Simulation in Materials and Hot-working, pp. 72-73, (1999)

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