Effect of rolling process on microstructure and properties of V-Nb micro-alloyed HRB600E steel rebar

doi:10.13251/j.issn.0254-6051.2021.08.028

Abstract

Abstract: Effect of rolling process on microstructure, mechanical properties and precipitation of V-Nb micro-alloyed HRB600E steel rebar was researched by means of confocal laser scanning high-temperature microscope, HR-TEM and OM systematically. The results show that with the increase of heating temperature and holding time, austenite grain size of the tested steel rebar increases. When the rolling temperature increases 60 ℃, the proportion and size of pearlite colony in the tested steel rebar increase 10.9% and 5.1 μm respectively, and the tensile strength increases 30-40 MPa, while the elongation decreases 3%-5%. Meanwhile, the precipitation amount of V(C, N) decreases while the amount of VNb(C, N) increases, the precipitation amount of the whole precipitated particles decreases but their equivalent circular diameter increases. The precipitation strengthening effect of various rolling processes has little difference, the strengthening effect of phase transition in the tested steel rebar is superior to the precipitation in the whole.

Key words: V-Nb micro-alloyed, rolling process, microstructure, mechanical properties, precipitation behavior

CLC Number:

TG156.5

Yang Xiaowei, Chen Huande, Zhou Yun, Zhang Yu. Effect of rolling process on microstructure and properties of V-Nb micro-alloyed HRB600E steel rebar[J]. Heat Treatment of Metals, 2021, 46(8): 150-155.

References

[1]杨才福, 陈雪慧, 王瑞珍. 高强度建筑钢筋质量分析及标准修改建议[J]. 钢铁, 2017, 52(10): 94-103.
Yang Caifu, Chen Xuehui, Wang Ruizhen. Quality assessment and suggestion of standard revision for high strength rebars in China[J]. Iron and Steel, 2017, 52(10): 94-103.
[2]麻晗, 王世芳. 节能型钢筋、线材的研发与生产实践[J]. 金属热处理, 2013, 38(7): 1-9.
Ma Han, Wang Shifang. Development and practice of energy saving steel reinforcing bar and wire[J]. Heat Treatment of Metals, 2013, 38(7): 1-9.
[3]周云, 杨晓伟, 陈焕德, 等. 加热温度对600 MPa级高强钢筋组织及性能的影响[J]. 钢铁, 2020, 55(1): 107-113.
Zhou Yun, Yang Xiaowei, Chen Huande, et al. Effect of heating temperature on microstructure and properties of 600 MPa grade high strength steel rebars[J]. Iron and Steel, 2020, 55(1): 107-113.
[4]杨晓伟, 周云, 陈焕德, 等. 钛微合金化HRB400E钢筋组织性能及强化机理[J]. 中国冶金, 2020, 30(1): 68-72.
Yang Xiaowei, Zhou Yun, Chen Huande, et al. Microstructure and strengthening mechanisms of Ti microalloyed HRB400E rebar[J]. China Metallurgy, 2020, 30(1): 68-72.
[5]翟永臻, 夏昊, 张昕, 等. 氮含量对V-N微合金化高强钢筋微观组织及力学性能的影响[J]. 金属热处理, 2018, 43(8): 31-34.
Zhai Yongzhen, Xia Hao, Zhang Xin, et al. Effect of nitrogen content on microstructure and mechanical properties of V-N microalloyed high strength steel bar[J]. Heat Treatment of Metals, 2018, 43(8): 31-34.
[6]Wang J J, Kang Y L, Yang C S, et al. Effect of heating temperature on the grain size and titanium solid-solution of titanium microalloyed steels[J]. Materials and Application, 2019, 10: 558-567.
[7]Zhang C L, Fang W, Cai B R, et al. Austenite grain growth and its effect on splitting fracture property of a V-N microalloyed medium carbon steel connecting rod[J]. Journal of Iron and Steel Research International, 2019, 26: 875-881.
[8]李阳, 左龙飞, 张建春, 等. 合金元素对HRB600钢筋强屈比性能的影响[J]. 材料热处理学报, 2016, 37(S1): 61-67.
Li Yang, Zuo Longfei, Zhang Jianchun, et al. Influence of alloying elements on yield strength ratio of HRB600 steel[J]. Transactions of Materials and Heat Treatment, 2016, 37(S1): 61-67.
[9]Shen X J, Tang S, Chen J, et al. Grain refinement in surface layers through deformation-induced ferrite transformation inmicroalloyed steel plate[J]. Materials and Design, 2017, 113: 137-141.
[10]周煌, 刘铖霖, 曹建春, 等. 高强抗震钢筋原位拉伸的微观组织变形机理[J]. 钢铁研究学报, 2018, 30(10): 822-829.
Zhou Huang, Liu Chenglin, Cao Jianchun, et al. Microstructure deformation mechanism of SEM in-situ tension in high-strength anti-seismic rebars[J]. Journal of Iron and Steel Research, 2018, 30(10): 822-829.
[11]段桂花, 张平, 李金许, 等. 铁素体和珠光体含量影响变形过程的原位研究[J]. 北京科技大学学报, 2014, 36(8): 1032-1038.
Duan Guihua, Zhang Ping, Li Jinxu, et al. In situ studies on the effect of ferrite and pearlite contents on the deformation process[J]. Journal of University of Science and Technology Beijing, 2014, 36(8): 1032-1038.
[12]张可, 孙新军, 张明亚, 等. Ti-V-Mo复合微合金钢中(Ti, V, Mo)C在γ/α中沉淀析出的动力学[J]. 金属学报, 2018, 54(8): 1122-1130.
Zhang Ke, Sun Xinjun, Zhang Mingya, et al. Kinetics of (Ti, V, Mo)C precipitated in γ/α matrix of Ti-V-Mo complex microalloyed steel[J]. Acta Metallurgica Sinica, 2018, 54(8): 1122-1130.
[13]吴静, 张恒华. 铌微合金钢析出相的形成与长大规律[J]. 金属热处理, 2011, 36(4): 4-7.
Wu Jing, Zhang Henghua. Formation and growth rules of participate in niobium micro-alloyed steel[J]. Heat Treatment of Metals, 2011, 36(4): 4-7.
[14]Gong P, Liu X G, Rijkenberg A, et al. The effect of molybdenum on interphase precipitation and microstructures in microalloyed steels containing titanium and vanadium[J]. Acta Materialia, 2018, 161: 374-387.
[15]陈翱, 李忠华, 何康, 等. 钛微合金钢形变诱导析出规律的热模拟[J]. 材料热处理学报, 2019, 40(5): 162-167.
Chen Ao, Li Zhonghua, He Kang, et al. Thermal simulation of stress-induced precipitation of titanium microalloyed steel[J]. Transactions of Materials and Heat Treatment, 2019, 40(5): 162-167.
[16]马红旭, 李友国. 硅钢中析出物的尺寸分布以及体积分数测定[J]. 材料科学与工程, 2002, 20(3): 328-330.
Ma Hongxu, Li Youguo. Measurement of size distribution and volume fraction of precipitates in silicon steel[J]. Material Science and Engineering, 2002, 20(3): 328-330.