Q345FRE耐火钢SH-CCT曲线测定与分析

doi:10.13251/j.issn.0254-6051.2022.10.014

金属热处理 ›› 2022, Vol. 47 ›› Issue (10): 88-93.DOI: 10.13251/j.issn.0254-6051.2022.10.014

Q345FRE耐火钢SH-CCT曲线测定与分析

刘攀¹, 王红鸿², 鄢文泽², 彭思远³

1.武汉科技大学理学院, 湖北武汉 430065;
2.武汉科技大学省部共建耐火材料与冶金国家重点实验室, 湖北武汉 430081;
3.武汉科技大学高性能钢铁材料及其应用省部共建协同创新中心, 湖北武汉 430081

收稿日期:2022-05-27 修回日期:2022-08-30 出版日期:2022-10-25 发布日期:2022-12-15
通讯作者: 王红鸿(1967—),博士生导师,E-mail: wanghonghong@wust.edu.cn
作者简介:刘攀(1996—),男,硕士研究生,主要研究方向为金属材料的加工成形与热处理,E-mail: 948088068@qq.com。

Determination and analysis of SH-CCT curve of Q345FRE fire-resistant steel

Liu Pan¹, Wang Honghong², Yan Wenze², Peng Siyuan³

1. College of Science, Wuhan University of Science and Technology, Wuhan Hubei 430065, China;
2. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan Hubei 430081, China;
3. Hubei Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan Hubei 430081, China

Received:2022-05-27 Revised:2022-08-30 Online:2022-10-25 Published:2022-12-15

摘要/Abstract

摘要： 利用Gleeble-3500试验机对Q345FRE耐火钢进行了焊接热模拟,结合膨胀法、杠杆法、金相分析与硬度测试,测得了Q345FRE耐火钢焊接热影响区在不同t_8/5条件下的相变温度,并绘制了焊接热影响区连续冷却转变曲线(SH-CCT),研究了其焊接热影响区在不同t_8/5条件下的组织变化规律。结果表明,当t_8/5为3~80 s时,Q345FRE耐火钢热影响区组织为贝氏体;当t_8/5为80~300 s时,其组织为贝氏体、铁素体和珠光体;当t_8/5为300~600 s时,其组织为铁素体和珠光体。随着t_8/5的增大,其焊接热影响区的组织硬度减小。为保持组织稳定性,Q345FRE耐火钢焊接线能量的适当选取范围为15~150 kJ/cm。

关键词: Q345FRE耐火钢, SH-CCT曲线, 显微组织, 硬度

Abstract: Welding thermal simulation of Q345FRE fire-resistant steel was carried out by using Gleeble-3500 testing machine. And the phase transition temperature of welding HAZ in the Q345FRE steel under different t_8/5 conditions was measured by means of expansion method, lever method, metallographic analysis and hardness, then SH-CCT curve of the Q345FRE steel was drawn, and the microstructure change of welding HAZ in the Q345FRE steel under different t_8/5conditions was studied. The results show that the microstructure of HAZ in the Q345FRE steel is bainite when t_8/5 is in the range of 3-80 s; when t_8/5 is in the range of 80-300 s, the microstructure is bainite, ferrite and pearlite; when t_8/5 is in the range of 300-600 s, the microstructure is ferrite and pearlite. As t_8/₅ increases, the hardness of HAZ in the Q345FRE steel decreases. In order to maintain the microstructure stability, it is suggested that the proper welding line energy of the Q345FRE fire-resistant steel should be selected in the range of 15-150 kJ/cm.

Key words: Q345FRE fire-resistant steel, SH-CCT curve, microstructure, hardness

中图分类号:

TG142.7

刘攀, 王红鸿, 鄢文泽, 彭思远. Q345FRE耐火钢SH-CCT曲线测定与分析[J]. 金属热处理, 2022, 47(10): 88-93.

Liu Pan, Wang Honghong, Yan Wenze, Peng Siyuan. Determination and analysis of SH-CCT curve of Q345FRE fire-resistant steel[J]. Heat Treatment of Metals, 2022, 47(10): 88-93.

参考文献

[1]Bennetts I D, Moinuddin K A M, Goh C C, et al. Testing and factors relevant to the evaluation of the structural adequacy of steel members within fire-resistant elevator shafts[J]. Fire Safety Journal, 2005, 40(8): 698-727.
[2]Kumar W, Sharma U K, Shome M. Mechanical properties of conventional structural steel and fire-resistant steel at elevated temperatures[J]. Journal of Constructional Steel Research, 2021, 181: 106615.
[3]刘程鹏, 牟洪仲. 高层建筑用耐火钢的组织与性能[J]. 金属热处理, 2014, 39(5): 94-97.
Liu Chengpeng, Mou Hongzhong. Microstructure and properties of fire-resistant steel for high rise building[J]. Heat Treatment of Metals, 2014, 39(5): 94-97.
[4]Wan Rongchun, Sun Feng, Zhang Lanting, et al. Development and study of high-strength low-Mo fire-resistant steel[J]. Materials and Design, 2012, 36: 227-232.
[5]陈晓, 刘继雄, 董汉雄, 等. 大线能量焊接耐火耐候建筑用钢的研制及应用[J]. 中国有色金属学报, 2004, 14(S1): 224-230.
Chen Xiao, Liu Jixiong, Dong Hanxiong, et al. Development of fire-resistant and weathering construction steel weldable with high heat input and its typical use[J]. The Chinese Journal of Nonferrous Metals, 2004, 14(S1): 224-230.
[6]李丽, 吴年春, 费亮, 等. 智能型耐火钢焊接热影响区高温拉伸性能研究[J]. 电焊机, 2015, 45(11): 67-72.
Li Li, Wu Nianchun, Fei Liang, et al. Study on high temperature tensile strength of heat-affected zone in welding of intelligent fire-resistant steel[J]. Electric Welding Machine, 2015, 45(11): 67-72.
[7]王道美, 邓伟, 崔强. 建筑用耐火钢的研究现状与发展趋势[J]. 山东冶金, 2014, 36(5): 5-8.
Wang Daomei, Deng Wei, Cui Qiang. Research situation and development trend of fire-resistant steel for building structure[J]. Shangdong Metallurgy, 2014, 36(5): 5-8.
[8]王鑫, 李昭东, 张可, 等. 多元微合金化耐火钢研究进展[J]. 钢结构, 2021, 36(3): 1-12.
Wang Xin, Li Zhaodong, Zhang Ke, et al. Research progress on multi-microalloyed fire-resistant steel[J]. Steel Construction, 2021, 36(3): 1-12.
[9]陆恒昌, 麻永林, 王权, 等. 高精度SH-CCT曲线绘制方法探索[J]. 电焊机, 2013, 43(11): 139-143.
Lu Hengchang, Ma Yonglin, Wang Quan, et al. Study of methods for drawing high-quality SH-CCT curves[J]. Electric Welding Machine, 2013, 43(11): 139-143.
[10]覃展鹏, 王红鸿, 任晓辉, 等. 耐火钢Q420FRE的SH-CCT曲线及相变动力学研究[J]. 武汉科技大学学报, 2017, 40(2): 88-94.
Qin Zhanpeng, Wang Honghong, Ren Xiaohui, et al. SH-CCT curves and phase transformation kinetics of fire-resistant steel Q420FER[J]. Journal of Wuhan University of Science and Technology, 2017, 40(2): 88-94.
[11]Qin Zhanpeng, Wang Honghong, Tong Zhi, et al. Variation in morphology and kinetics of granular bainite with welding thermal cycles in high-Nb fire-resistant steel: Experiments and theoretical calculations[J]. Journal of Materials Engineering and Performance, 2019, 28: 321-329.
[12]Bansal G K, Srivastava V C, Chowdhury S G. Role of solute Nb in altering phase transformations during continuous cooling of a low-carbon steel[J]. Materials Science and Engineering A, 2019, 767: 138416.
[13]Khare S, Lee K, Bhadeshia H K. Relative effects of Mo and B on ferrite and bainite kinetics in strong steels[J]. International Journal of Materials Research, 2009, 100(11): 1513-1520.
[14]Wan Rongchun, Sun Feng, Zhang Lanting, et al. Effects of Mo on high-temperature strength of fire-resistant steel[J]. Materials and Design, 2012, 35: 335-341.
[15]Long X Y, Zhang F C, Zhang C Y. Effect of Mn content on low-cycle fatigue behaviors of low-carbon bainitic steel[J]. Materials Science and Engineering A, 2017, 697: 111-118.
[16]万荣春, 孙锋, 付立铭, 等. Nb对Q345低Mo耐火钢CCT曲线的影响[J]. 金属热处理, 2021, 46(2): 25-29.
Wang Rongchun, Sun Feng, Fu Liming, et al. Effect of Nb on CCT curves of Q345 low-Mo fire-resistant steel[J]. Heat Treatment of Metals, 2021, 46(2): 25-29.
[17]Kong Junhua, Zhen Lin, Guo Bin, et al. Influence of Mo content on microstructure and mechanical properties of high strength pipeline steel[J]. Materials and Design, 2004, 25(8): 723-728.
[18]Assefpour-Dezfuly M, Hugaas B A, Brownrigg A. Fire resistant high-strength low-alloy steel[J]. Materials Science and Technology, 1990, 6(12): 1210-1214.
[19]张文钺. 焊接冶金学[M]. 北京: 机械工业出版社, 1996.

Q345FRE耐火钢SH-CCT曲线测定与分析

Determination and analysis of SH-CCT curve of Q345FRE fire-resistant steel

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	高星, 张宁, 丁燕, 蒋波. 热处理时间对激光选区成形TC4钛合金组织及力学性能的影响[J]. 金属热处理, 2022, 47(9): 12-17.
[2]	潘冉, 刘宝胜, 曾元松, 曲海涛, 王东, 慕延宏. 深冷处理对15%SiC_p/2009铝基复合材料组织与力学性能的影响[J]. 金属热处理, 2022, 47(9): 65-70.
[3]	季德静, 杨维宇, 白雅琼. 高强韧工程机械用钢Q690D的淬火工艺优化[J]. 金属热处理, 2022, 47(9): 108-112.
[4]	王世凯, 王睿, 康燕, 于志强, 闫志杰. 淬火温度对Cr5MoVNi钢组织和性能的影响[J]. 金属热处理, 2022, 47(9): 125-129.
[5]	熊维亮, 梁文, 吴腾, 梁亮, 吴浩鸿. 控冷工艺对热轧双相钢组织与性能的影响[J]. 金属热处理, 2022, 47(9): 130-133.
[6]	范朝, 程宗辉, 张志强. 激光热输入对激光增材修复1Cr17Ni2不锈钢组织与力学性能的影响[J]. 金属热处理, 2022, 47(9): 140-145.
[7]	李敬, 刘辰, 杨跃辉, 苑少强, 艾晨光. 厚规格Q690D高强钢板的连续冷却转变行为[J]. 金属热处理, 2022, 47(9): 171-174.
[8]	田伟, 潘伟, 钟庆元. 0Cr16Ni5Mo马氏体不锈钢δ-铁素体含量及奥氏体晶粒度的控制[J]. 金属热处理, 2022, 47(9): 194-201.
[9]	周文浩. 高强度桥梁钢Q690q的连续冷却转变行为[J]. 金属热处理, 2022, 47(9): 202-207.
[10]	谯德高, 罗晓阳, 胡双喜, 侯园园, 张志坚, 唐兴昌. 280VK冷轧高强钢退火过程的组织演变及析出机理[J]. 金属热处理, 2022, 47(9): 220-226.
[11]	赵竞, 王丽萍, 冯义成, 姜文勇, 王雷, 郭二军. 硅含量对耐热球墨铸铁显微组织和力学性能的影响[J]. 金属热处理, 2022, 47(9): 227-233.
[12]	关蕴奇, 李亮, 胡文祥, 史正良, 徐嘉. Ni含量对淬回火态40CrNiMo钢显微组织和力学性能的影响[J]. 金属热处理, 2022, 47(9): 245-249.
[13]	周丽娜, 刘明, 高翔, 王文雪, 童锐. 奥氏体化过程对Cr14Mo4V高温轴承钢微观组织的影响[J]. 金属热处理, 2022, 47(8): 7-15.
[14]	何博, 彭天恩, 胡学文, 蒋波, 郭锐, 石践, 汪飞, 王海波. Nb对高Ti耐候钢连续冷却后显微组织及硬度的影响[J]. 金属热处理, 2022, 47(8): 46-51.
[15]	秦铁玉, 宋春燕, 马汝成, 张学峰, 郝威, 贵永亮. Si含量对Fe-Cr-Si系合金组织与耐蚀性能的影响[J]. 金属热处理, 2022, 47(8): 77-82.