X80 pipeline steel was welded with submerged arc automatic welding, the microstructures, cavity sizes, fusion depths and plane scanning of chemical elements in the welded zone, fusion zone, heat affected zone and base steel were observed with OM (optical microscope) and SEM (scanning electron microscope), respectively. The experimental results show that there is main acicular ferrite in the base steel and welded zone, the microscopic structure of fusion zone is a blocked bainite, and the heat affected zone is composed of multilateral ferrite and pearlite. M-A unit of the welded zone is the main factor to strengthen the welded zone, composed of acicular ferrites. The percentage of cavities in the welded joint is less than that in the base steel, which is beneficial to increasing its mechanical performance and corrosion resistance. The fusion depth in the fusion zone and welded zone is 101.13μm and 115.85μm, respectively, and the distribution of chemical elements in the welded zone is uniform, no enrichment phenomena.
参考文献
| [1] | 李冉,魏金山,彭云,田志凌,施哲.X80管线钢气体保护焊用焊丝的研制[J].焊接学报,2007(07):97-100. |
| [2] | 毕宗岳,雷阿利,王娜,冯拉俊.X80管线钢焊接热影响区在含S2-介质中的耐蚀性分析[J].焊接学报,2009(10):89-92. |
| [3] | 张敏,姚成武,聂斌英.X80管线钢埋弧焊接头性能分析[J].焊接学报,2005(09):19-22,26. |
| [4] | Constance W. Ziemian;Mala M. Sharma;Donald E. Whaley .Effects of flashing and upset sequences on microstructure, hardness, and tensile properties of welded structural steel joints[J].Materials & design,2012(Jan.):175-184. |
| [5] | 陈延清,杜则裕,许良红.X80管线钢焊接热影响区组织和性能分析[J].焊接学报,2010(05):101-104. |
| [6] | Guo, A.;Misra, R.D.K.;Xu, J.;Guo, B.;Jansto, S.G. .Ultrahigh strength and low yield ratio of niobium-microalloyed 900MPa pipeline steel with nano/ultrafine bainitic lath[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(16/17):3886-3892. |
| [7] | Furen Xiao;Bo Liao;Deliang Ren .Acicular ferritic microstructure of a low-carbon Mn-Mo-Nb microalloyed pipeline steel[J].Materials Characterization,2005(4/5):305-314. |
| [8] | Ming-Chun Zhao;Ke Yang;Yi-Yin Shan .Comparison on strength and toughness behaviors of microalloyed pipeline steels with acicular ferrite and ultrafine ferrite[J].Materials Letters,2003(9/10):1496-1500. |
| [9] | 张敏,姚成武,周永欣,王为波.X80管线钢埋弧焊缝组织特征及其控制的试验研究[J].中国石油大学学报（自然科学版）,2006(05):88-92,97. |
| [10] | Rutao Li;Xiurong Zuo;Yueyue Hu .Microstructure and properties of pipeline steel with a ferrite/ martensite dual-phase microstructure[J].Materials Characterization,2011(8):801-806. |
| [11] | Xiao FR;Liao B;Shan YY;Qiao GY;Zhong Y;Zhang CL;Yang K .Challenge of mechanical properties of an acicular ferrite pipeline steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1-2):41-52. |
| [12] | 任毅,张帅,王爽.组织形貌对X80管线钢性能影响[J].北京科技大学学报,2007(08):798-802. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%