Effect of tempering temperature on microstructure and tensile properties of high-strength pipeline steel

doi:10.13251/j.issn.0254-6051.2025.05.037

Abstract

Abstract: Effect of tempering temperature on the microstructure and tensile properties of high-strength pipeline steel was studied by means of a scanning electron microscope, backscattered diffraction microscope, X-ray diffractometer, and tensile testing machine. The results demonstrate that as the tempering temperature increases, the microstructure of the tested steel evolves from smaller granular and needle-like bainite to larger polygonal ferrite, the full width at half maximum of the α peak is significantly reduced, and the dislocation density decreases. The proportion of small angle misorientation in un-tempered, 600 ℃, and 650 ℃ tempered tested steels is higher than that in 700 ℃ tempered tested steel. Compared with un-tempered tested steel, the strength of tempered tested steel experiences a cliff-like decrease, while the total elongation and uniform elongation show a rapid increase trend. The strength and plasticity of the tested steel are attributable to a synergistic effect of dislocation strengthening and fine-grain strengthening.

Key words: high strength pipeline steel, tempering temperature, microstructure, mechanical properties

CLC Number:

TG142

Liu Yang, Liu Jianhong, Gao Ze. Effect of tempering temperature on microstructure and tensile properties of high-strength pipeline steel[J]. Heat Treatment of Metals, 2025, 50(5): 242-247.

References

[1] 朱艳强, 李永刚, 何琼, 等. 深冷处理对X70管线钢组织与力学性能的影响[J]. 金属热处理, 2024, 49(5): 168-172.
Zhu Yanqiang, Li Yonggang, He Qiong, et al. Effect of cryogenic treatment on microstructure and mechanical properties of X70 pipeline steel[J]. Heat Treatment of Metals, 2024, 49(5): 168-172.
[2] 刘干, 孔祥磊, 黄明浩, 等. 冷却速率对超高强度X90M管线钢相变行为的影响[J]. 金属热处理, 2024, 49(5): 162-167.
Liu Gan, Kong Xianglei, Huang Minghao, et al. Effect of cooling rate on phase transformation behavior of ultra-high strength X90M pipeline steel[J]. Heat Treatment of Metals, 2024, 49(5): 162-167.
[3] 李忠义. X70和X90管线钢强韧性能优化研究[D]. 北京: 北京科技大学, 2021.
[4] 冯耀荣, 吉玲康, 李为卫, 等. 中国X80管线钢和钢管研发应用进展及展望[J]. 油气储运, 2020, 39(6): 612-622.
Feng Yaorong, Ji Lingkang, Li Weiwei, et al. Progress and prospects of research and application of X80 pipeline steel and steel pipe in China[J]. Oil & Gas Storage and Transportation, 2020, 39(6): 612-622.
[5] 宿成, 袁晓鸣, 曹妍, 等. 控轧控冷工艺对厚规格X80M热轧钢带DWTT性能的影响[J]. 钢铁, 2024, 59(11): 122-130.
Su Cheng, Yuan Xiaoming, Cao Yan, et al. Effects of TMCP on DWTT property of thick X80M hot rolled steel strip[J]. Iron and Steel, 2024, 59(11): 122-130.
[6] 刘阳, 刘峻峰, 张斌, 等. 我国长输天然气用管线钢的发展现状与趋势[J]. 材料热处理学报, 2024, 45(3): 98-112.
Liu Yang, Liu Junfeng, Zhang Bin, et al. Development status and trend of pipeline steel for long-distance natural gas transportation in China[J]. Transactions of Materials and Heat Treatment, 2024, 45(3): 98-112.
[7] 牛辉, 刘清友, 杨忠文, 等. 基于应变设计用厚规格X80管线钢组织与性能关系[J]. 钢铁, 2013, 48(8): 55-60.
Niu Hui, Liu Qingyou, Yang Zhongwen, et al. Relationship between microstructures and mechanical properties of strain based design X80 pipeline steel[J]. Iron and Steel, 2013, 48(8): 55-60.
[8] 赵时璐, 张震, 张钧, 等. X80级管线钢热煨弯管的热处理工艺及力学性能[J]. 金属热处理, 2015, 40(10): 123-126.
Zhao Shilu, Zhang Zhen, Zhang Jun, et al. Heat treatment processes and mechanical properties of X80 grade pipeline steel bend[J]. Heat Treatment of Metals, 2015, 40(10): 123-126.
[9] 张帅, 任毅, 王爽, 等. 回火工艺对高强度管线钢组织性能的影响[J]. 鞍钢技术, 2009(1): 18-21.
Zhang Shuai, Ren Yi, Wang Shuang, et al. Effect of tempering process on the structure property of high strength pipeline steel[J]. Angang Technology, 2009(1): 18-21.
[10] 刘文月, 李天怡, 安涛, 等. 回火工艺对热处理X80管线钢组织性能的影响[C]//第十四届中国钢铁年会论文集. 2023: 192-198.
[11] 王娇娇, 赵林林, 高云哲, 等. 回火温度对深井石油套管用钢组织性能的影响[J]. 金属热处理, 2024, 49(3): 112-115.
Wang Jiaojiao, Zhao Linlin, Gao Yunzhe, et al. Effect of tempering temperature on microstructure and properties of an oil casing steel used for deep wells[J]. Heat Treatment of Metals, 2024, 49(3): 112-115.
[12] Gallet J, Perez M, Guillou R, et al. Experimental measurement of dislocation density in metallic materials: A quantitative comparison between measurements techniques (XRD, R-ECCI, HR-EBSD, TEM)[J]. Materials Characterization, 2023, 199: 112842.
[13] Zheng G M, Tang B, Zhou Q, et al. Development of aflow localization band and texture in a forged near-α titanium alloy[J]. Metals, 2020, 10(1): 121.
[14] 祁科武, 赵宇宏, 田晓林, 等. 取向角对小角度非对称倾斜晶界位错运动影响的晶体相场模拟[J]. 物理学报, 2020, 69(14): 140504.
Qi Kewu, Zhao Yuhong, Tian Xiaolin, et al. Phase field crystal simulation of effect of misorientation angle on low-angle asymmetric tilt grain boundary dislocation motion[J]. Acta Physica Sinica, 2020, 69(14): 140504.
[15] Zhang Y, Long X Y, Zhang Z, et al. Effect of phase transformation sequence on the low cycle fatigue properties of bainitic/martensitic multiphase steels[J]. International Journal of Fatigue, 2024, 178: 107995.
[16] 张淼, 万德成, 张波, 等. Fe-0.13C-2.0Mn-0.6Al复相钢在不同退火温度下的组织与性能[J]. 金属热处理, 2024, 49(6): 43-48.
Zhang Miao, Wan Decheng, Zhang Bo, et al. Microstructure and properties of Fe-0.13C-2.0Mn-0.6Al multiphase steels annealed at different temperatures[J]. Heat Treatment of Metals, 2024, 49(6): 43-48.
[17] 刘晓军, 苏冬雪, 丁志敏. 高碳高锰钢拉伸过程中应变硬化行为的研究[J]. 大连交通大学学报, 2019, 40(5): 76-81.
Liu Xiaojun, Su Dongxue, Ding Zhimin. Study on strain hardening behavior of high carbon and high manganese steel during tensile process[J]. Journal of Dalian Jiaotong University, 2019, 40(5): 76-81.
[18] 杨阳, 陈晨, 董旭, 等. 晶粒尺寸对高氮高锰奥氏体钢耐磨性的影响[J]. 金属热处理, 2024, 49(6): 169-176.
Yang Yang, Chen Chen, Dong Xu, et al. Effect of grain size on wear resistance of high nitrogen high manganese austenitic steel[J]. Heat Treatment of Metals, 2024, 49(6): 169-176.
[19] Bhadehia H K D H, Waugh A R. Bainite: Anatom-probe study of the incomplete reaction phenomenon[J]. Acta Metallurgica, 1982, 30(4): 775-784.
[20] He S H, He B B, Zhu K Y, et al. On the correlation among dislocation density, lath thickness and yield stress of bainite[J]. Acta Materialia, 2017, 135: 382-389.