热轧65Mn带钢等温相变行为及组织性能与扁卷的协同调控

doi:10.13251/j.issn.0254-6051.2024.09.004

金属热处理 ›› 2024, Vol. 49 ›› Issue (9): 24-30.DOI: 10.13251/j.issn.0254-6051.2024.09.004

热轧65Mn带钢等温相变行为及组织性能与扁卷的协同调控

田亚强¹, 么志强¹, 年保国², 张俊粉³, 张晓磊³, 宋进英¹, 张明山¹, 陈连生¹

1.华北理工大学现代冶金技术教育部重点实验室, 河北唐山 063210;
2.河钢材料技术研究院, 河北石家庄 050023;
3.承德钒钛新材料有限公司, 河北承德 067102

收稿日期:2024-03-06 修回日期:2024-07-02 出版日期:2024-09-25 发布日期:2024-10-29
通讯作者: 张明山,讲师,博士,E-mail: zhangms@ncst.edu.cn
作者简介:田亚强(1980—),男,教授,博士,主要研究方向为金属材料组织性能控制及强韧化,E-mail: tyqwylfive@163.com。
基金资助:
河北省中央引导地方科技发展资金项目(246Z1021G)

Isothermal phase transformation behavior and cooperative regulation of microstructure and properties and flat coil of hot rolling 65Mn steel strip

Tian Yaqiang¹, Yao Zhiqiang¹, Nian Baoguo², Zhang Junfen³, Zhang Xiaolei³, Song Jinying¹, Zhang Mingshan¹, Chen Liansheng¹

1. Key Laboratory of the Ministry of Education for Modern Metallurgy Technology, North China University of Science and Technology, Tangshan Hebei 063210, China;
2. HBIS Material Technology Research Institute, Shijiazhuang Hebei 050023, China;
3. Chengde Vanadium Titanium New Material Co., Ltd., Chengde Hebei 067102, China

Received:2024-03-06 Revised:2024-07-02 Online:2024-09-25 Published:2024-10-29

摘要/Abstract

摘要： 利用淬火相变仪得到65Mn钢的等温转变曲线(TTT曲线),基于该曲线研究了不同卷取温度下钢的显微组织与力学性能的演变规律,并对扁卷产生的可能原因和调控方法进行了探讨。结果表明:获得65Mn钢典型显微组织即先共析铁素体和珠光体的温度为600~750 ℃。TTT曲线呈典型C字形,550 ℃为“鼻尖”温度,孕育期较短,仅有0.25 s。其中,在65Mn钢典型组织形成温度范围内,随着温度的升高,孕育期逐渐增大,并且先共析铁素体含量增多,珠光体含量降低。根据实际生产,选取的65Mn钢卷取温度为650~750 ℃,显微组织均为先共析铁素体和珠光体。随着卷取温度由750 ℃降低至650 ℃,先共析铁素体含量由19.4%减少到4.1%,分布状态逐渐由块状分布过渡到网状分布,珠光体片层间距由277.0 nm减少到178.0 nm,使65Mn钢的屈服强度由534 MPa提高到637 MPa,抗拉强度由776 MPa提高到899 MPa,硬度由18.8 HRC提高到24.3 HRC,断裂总延伸率由28.9%降低到19.4%。在实际生产中,基于TTT曲线和不同卷取温度下组织与性能的演变规律调整卷取温度与卸卷前的停留时间,可以实现组织性能与扁卷缺陷的协同调控。

关键词: 65Mn钢, TTT曲线, 卷取工艺, 组织性能, 扁卷

Abstract: Isothermal transformation curve (TTT curve) of 65Mn steel was obtained by quenching phase change machine. Based on this curve, the evolution of microstructure and mechanical properties at different coiling temperatures was studied, and the possible causes and control methods of flat coil were discussed. The results show that the typical microstructure of the 65Mn steel, namely proeutectoid ferrite and pearlite, is obtained between 600-750 ℃. The TTT curve presents a typical "C" shape, with a "nose tip" temperature of 550 ℃. The incubation period is relatively short at this temperature, only 0.25 s. Within the typical microstructure formation temperature range of the 65Mn steel, the incubation period gradually increases with the increase of temperature, and the content of proeutectoid proeutectoid ferrite increases, while the content of pearlite decreases. According to the actual production, the selected coiling temperature of the 65Mn steel is between 650-750 ℃, and the microstructure is proeutectoid ferrite and pearlite. With the coiling temperature decreases from 750 ℃ to 650 ℃, the proeutectoid ferrite content decreases from 19.4% to 4.1%, and the distribution gradually transitions from block distribution to network distribution. The pearlite lamellar spacing decreases from 277.0 nm to 178.0 nm, resulting in an increase in the yield strength of the 65Mn steel from 534 MPa to 637 MPa, an increase in ultimate tensile strength from 776 MPa to 899 MPa, an increase in hardness from 18.8 HRC to 24.3 HRC, and a decrease in percentage total extension at fracture from 28.9% to 19.4%. In actual production, the coiling temperature and the holding time before coil discharging are adjusted based on TTT curve and the evolution of microstructure and mechanical properties under different coiling temperatures can achieve synergistic regulation of microstructure, mechanical properties and flat coil defects.

Key words: 65Mn steel, TTT curve, coiling process, microstructure and properties, flat coil

中图分类号:

TG142.1

田亚强, 么志强, 年保国, 张俊粉, 张晓磊, 宋进英, 张明山, 陈连生. 热轧65Mn带钢等温相变行为及组织性能与扁卷的协同调控[J]. 金属热处理, 2024, 49(9): 24-30.

Tian Yaqiang, Yao Zhiqiang, Nian Baoguo, Zhang Junfen, Zhang Xiaolei, Song Jinying, Zhang Mingshan, Chen Liansheng. Isothermal phase transformation behavior and cooperative regulation of microstructure and properties and flat coil of hot rolling 65Mn steel strip[J]. Heat Treatment of Metals, 2024, 49(9): 24-30.

参考文献

[1]李秀景, 王淑华, 张星, 等. 薄板坯热连轧工艺对65Mn钢带组织和性能的影响[J]. 钢铁钒钛, 2020, 41(6): 158-163.
Li Xiujing, Wang Shuhua, Zhang Xing, et al. Effect of FTSR hot rolling process on microstructure and mechanical properties of 65Mn strip[J]. Iron Steel Vanadium Titanium, 2020, 41(6): 158-163.
[2]杨莹莹, 吴红艳, 齐敏, 等. 热轧工艺对65Mn钢显微组织及力学性能的影响[J]. 金属热处理, 2021, 46(12): 218-222.
Yang Yingying, Wu Hongyan, Qi Min, et al. Effect of hot rolling on microstructure and properties of 65Mn steel[J]. Heat Treatment of Metals, 2021, 46(12): 218-222.
[3]张保忠, 孙国敏, 李志伟, 等. 65Mn钢LF精炼渣系优化及工业试验[J]. 特殊钢, 2023, 44(4): 65-69.
Zhang Baozhong, Sun Guomin, Li Zhiwei, et al. Refining slag system optimization and industrial testing for 65Mn steel[J]. Special Steel, 2023, 44(4): 65-69.
[4]吴哲, 张彩军, 陈金, 等. 冷却速度和奥氏体晶粒对铁素体形核影响研究[J]. 钢铁钒钛, 2018, 39(3): 134-138.
Wu Zhe, Zhang Caijun, Chen Jin, et al. Influence of cooling rate and austenite grain size on nucleation of ferrite[J]. Iron Steel Vanadium Titanium, 2018, 39(3): 134-138.
[5]王畅, 于洋, 王林, 等. 捆带钢扁卷原因分析及机理探讨[J]. 物理测试, 2014, 32(6): 40-44.
Wang Chang, Yu Yang, Wang Lin, et al. Cause analysis and mechanism discussion of coil oval deformation during the production of strapping steel[J]. Physics Examination and Testing, 2014, 32(6): 40-44.
[6]尹红国. 热镀锌环保自润滑产品卷取缺陷分析与控制[J]. 材料保护, 2018, 51(11): 144-147.
Yin Hongguo. Analysis and control on coiling defects of hot dip galvanized environmental-friendly self-lubricating products[J]. Materials Protection, 2018, 51(11): 144-147.
[7]王素芬, 李志杰, 周建强, 等. SPHC带钢冷却过程温度与相变耦合预测模型[J]. 热加工工艺, 2019, 48(9): 176-179.
Wang Sufen, Li Zhijie, Zhou Jianqiang, et al. Coupled prediction model of temperature and phase transformation in cooling process of SPHC strip steel[J]. Hot Working Technology, 2019, 48(9): 176-179.
[8]惠亚军, 刘锟, 吴科敏, 等. 卷取温度对500 MPa级热冲压桥壳用钢组织与力学性能的影响[J]. 金属学报, 2020, 56(12): 1605-1616.
Hui Yajun, Liu Kun, Wu Kemin, et al. Effect of coiling temperature on microstructure and mechanical properties of 500 MPa grade hot stamping axle housing steel[J]. Acta Metallurgica Sinica, 2020, 56(12): 1605-1616.
[9]杨俊伟, 李昭东, 张可, 等. 卷取温度对模拟热轧51CrV4钢显微组织和力学性能的影响[J]. 金属热处理, 2016, 41(2): 98-103.
Yang Junwei, Li Zhaodong, Zhang Ke, et al. Influence of coiling temperature on microstructure and mechanical properties of 51CrV4 steel under simulated hot rolling[J]. Heat Treatment of Metals, 2016, 41(2): 98-103.
[10]陈连生, 齐祥羽, 宋进英, 等. 65Mn锯片用钢硬度不均原因分析[J]. 钢铁钒钛, 2015, 36(5): 134-138.
Chen Liansheng, Qi Xiangyu, Song Jinying, et al. Analysis on non-uniform hardness in saw blade of 65Mn steel[J]. Iron Steel Vanadium Titanium, 2015, 36(5): 134-138.
[11]田云静, 赵刚, 叶传龙, 等. ZLX72A帘线钢TTT曲线测定及分析[J]. 热加工工艺, 2014, 43(18): 59-62.
Tian Yunjing, Zhao Gang, Ye Chuanlong, et al. Determination and analysis on TTT curves of ZLX72A cord steel[J]. Hot Working Technology, 2014, 43(18): 59-62.
[12]陈继林, 马洪磊, 霍立伟, 等. Cr-Mo-V系冷镦钢表面脱碳演变规律的研究[J]. 钢铁钒钛, 2022, 43(6): 153-160.
Chen Jilin, Ma Honglei, Huo Liwei, et al. Study on the evolution law of surface decarburization of Cr-Mo-V cold heading steel[J]. Iron Steel Vanadium Titanium, 2022, 43(6): 153-160.
[13]曾林林, 王程, 杨达朋, 等. 表面脱碳对Al-Si镀层热冲压钢弯曲韧性的影响[J]. 钢铁, 2023, 58(9): 209-217.
Zeng Linlin, Wang Cheng, Yang Dapeng, et al. Effect of surface decarburization on bending toughness of Al-Si coated hot stamping steel[J]. Iron and Steel, 2023, 58(9): 209-217.
[14]佟倩, 张玮, 柳洋波, 等. 55SiCr弹簧钢表面脱碳的研究[J]. 上海金属, 2013, 35(2): 27-31.
Tong Qian, Zhang Wei, Liu Yangbo, et al. Surface decarburization of spring steel 55SiCr[J]. Shanghai Metals, 2013, 35(2): 27-31.
[15]陈涛, 赵爱民, 樊红亮, 等. 65MnCr耐磨钢的连续冷却曲线和相变规律[J]. 材料热处理学报, 2016, 37(9): 144-150.
Chen Tao, Zhao Aimin, Fan Hongliang, et al. Continuous cooling curve and phase transformation behavior of wear resistant steel 65MnCr[J]. Transactions of Materials and Heat Treatment, 2016, 37(9): 144-150.
[16]易航, 杨庚蔚, 毛新平, 等. 变形温度对CSP热轧65Mn带钢相变行为的影响[J]. 钢铁研究学报, 2020, 32(1): 74-80.
Yi Hang, Yang Gengwei, Mao Xinping, et al. Effect of deformation temperature on phase transformation behavior of hot rolled 65Mn steel produced by CSP process[J]. Journal of Iron and Steel Research, 2020, 32(1): 74-80.
[17]陈斌, 白丽杨, 张宇光, 等. 卷取温度对IF钢组织性能影响规律[J]. 中国冶金, 2019, 29(8): 34-38.
Chen Bin, Bai Liyang, Zhang Yuguang, et al. Effects of coiling temperature on microstructure and properties of IF steel[J]. China Metallurgy, 2019, 29(8): 34-38.
[18]梁小凯, 刘清友, 张建平, 等. 薄板坯连铸连轧工艺参数对低碳钢组织和性能的影响[J]. 钢铁钒钛, 2006, 27(1): 1-5.
Liang Xiaokai, Liu Qingyou, Zhang Jianping, et al. Effect of technological parameters on microstructures and mechanical properties of low carbon steel in thin slab continuous rolling process[J]. Iron Steel Vanadium Titanium, 2006, 27(1): 1-5.
[19]曹梅青, 温将云, 陈鹏涛, 等. 温轧TWIP钢/高碳钢组织及力学性能研究[J]. 山东科技大学学报(自然科学版), 2023, 42(3): 63-69.
Cao Meiqing, Wen Jiangyun, Chen Pengtao, et al. Microstructure and mechanical properties of warm-rolled TWIP/HC steel[J]. Journal of Shandong University of Science and Technology(Natural Science), 2023, 42(3): 63-69.
[20]万志健, 赵海, 刘学华, 等. 钒对车轮钢组织及力学性能的影响[J]. 钢铁, 2023, 58(5): 104-111.
Wan Zhijian, Zhao Hai, Liu Xuehua, et al. Effect of V on microstructure and mechanical properties of wheel steel[J]. Iron and Steel, 2023, 58(5): 104-111.
[21]张雄, 余伟, 王云龙. 38MnSiVS非调质钢的相变模型[J]. 钢铁, 2021, 56(3): 130-136.
Zhang Xiong, Yu Wei, Wang Yunlong. Phase transformation model of 38MnSiVS non-tempered steel[J]. Iron and Steel, 2021, 56(3): 130-136.
[22]钟勇. 一种先进高强钢热轧卷取后相变规律研究[J]. 宝钢技术, 2021(4): 1-7.
Zhong Yong. Study on post-coiling transformation of a hot rolled AHS[J]. Baosteel Technology, 2021(4): 1-7.
[23]白振华, 陈浩, 丁殿坤, 等. 钢卷“鼓肚”缺陷形成机理及其预报模型[J]. 塑性工程学报, 2014, 21(3): 20-25.
Bai Zhenhua, Chen Hao, Ding Diankun, et al. Generation mechanism and forecast model of coil bulging defect[J]. Journal of Plasticity Engineering, 2014, 21(3): 20-25.
[24]胡汉江, 赵爱民, 董瑞, 等. 72AU2热轧带钢塌卷问题温度场及应力场耦合分析[J]. 金属热处理, 2015, 40(9): 193-197.
Hu Hanjiang, Zhao Aimin, Dong Rui, et al. Temperature and stress field coupling analysis for collapse of 72AU2 hot rolled strip[J]. Heat Treatment of Metals, 2015, 40(9): 193-197.
[25]徐刚. 780MPa级冷轧双相钢的组织与性能[J]. 钢铁研究学报, 2012, 24(8): 44-47.
Xu Gang. Microstructure and property of 780 MPa cold rolling dual-phase steel[J]. Journal of Iron and Steel Research, 2012, 24(8): 44-47.
[26]Cho H H, Cho Y G, Im Y R, et al. A finite element analysis for asymmetric contraction after coiling of hot-rolled steel[J]. Journal of Materials Processing Technology, 2010, 210(6): 907-913.
[27]Banks K, Tuling A, Mintz B. Influence of chemistry and runout table parameters on hot coil collapse in C-Mn steels[J]. Ironmaking and Steelmaking, 2011, 38(3): 204-210.

热轧65Mn带钢等温相变行为及组织性能与扁卷的协同调控

Isothermal phase transformation behavior and cooperative regulation of microstructure and properties and flat coil of hot rolling 65Mn steel strip

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