不同热处理条件下贝氏体钢的微观组织和疲劳裂纹扩展

doi:10.13251/j.issn.0254-6051.2022.02.027

金属热处理 ›› 2022, Vol. 47 ›› Issue (2): 153-158.DOI: 10.13251/j.issn.0254-6051.2022.02.027

不同热处理条件下贝氏体钢的微观组织和疲劳裂纹扩展

董瑞, 陈林, 岑耀东, 包喜荣

内蒙古科技大学材料与冶金学院, 内蒙古包头 014010

收稿日期:2021-10-14 修回日期:2021-12-22 出版日期:2022-02-25 发布日期:2022-04-01
通讯作者: 陈林,教授,E-mail:chenlin39805@163.com
作者简介:董瑞(1985—),女,讲师,博士,主要研究方向为金属材料的组织和性能控制,E-mail:snow_dr@163.com。
基金资助:
包头市科技计划(2019Z3004-1)

Microstructure and fatigue crack growth of a bainitic steel under different heat treatments

Dong Rui, Chen Lin, Cen Yaodong, Bao Xirong

School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China

Received:2021-10-14 Revised:2021-12-22 Online:2022-02-25 Published:2022-04-01

摘要/Abstract

摘要： 以贝氏体钢为研究对象,设计了4种热处理工艺,研究了不同热处理工艺下试验钢的显微组织及疲劳裂纹扩展速率。结果表明,热轧态试验钢的微观组织以粒状贝氏体为主,其上分布有少量的板条贝氏体、马氏体和粗大块状M/A岛,残留奥氏体的体积分数为16.2%,但稳定性较差,裂纹能够直接穿过粗大的块状M/A岛继续扩展,疲劳裂纹扩展速率最快。经900 ℃奥氏体化+空冷后,显微组织以板条贝氏体和马氏体为主,M/A岛仍为粗大的块状,残留奥氏体含量减少至12.3%,疲劳裂纹扩展速率略有降低。经900 ℃奥氏体化+380 ℃盐浴等温30 min +空冷后,显微组织以细密、有序的板条贝氏体为主,残留奥氏体含量减少至10.2%,以薄膜状伴生在板条贝氏体间,板条状贝氏体及板条间的残留奥氏体薄膜会使裂纹端钝化、分叉、偏折,阻碍裂纹扩展的能力增强;经350 ℃回火240 min后,显微组织以马氏体和板条贝氏体为主,残留奥氏体含量比热轧态略微降低,为14.9%;而经450 ℃回火240 min后,显微组织以板条状贝氏体为主,其上分布有少量的马氏体,残留奥氏体体积分数减少至8.6%,也以薄膜状伴生在贝氏体板条间,同时有大量的碳化物析出,裂纹扩展速率最慢。

关键词: 贝氏体钢, 热处理, 微观组织, 残留奥氏体, 疲劳裂纹

Abstract: Microstructure and fatigue crack growth rate of a bainitic steel under four different heat treatment processes were studied. The results show that the microstructure of the hot rolled tested steel mainly consists of granular bainite with a small amount of lath bainite, martensite and coarse M/A islands. The volume fraction of retained austenite is 16.2%, but with poor stability. The crack can propagate continuously by directly through the coarse M/A islands, and the fatigue crack propagation rate is the fastest. After austenitizing at 900 ℃ and air cooling, the microstructure turns into lath bainite and martensite mainly, still with coarse massive M/A islands, the content of retained austenite is reduced to 12.3%, and the fatigue crack growth rate is slightly reduced. After austenitizing at 900 ℃ plus holding in salt bath at 380 ℃ for 30 min then air cooling, the microstructure is mainly composed of fine and ordered lath bainite, the retained austenite content reduces to 10.2%, which is associated between bainite laths in the form of thin film. Both such lath bainite and thin film retained austenite can lead to the passivation, bifurcation and deflection of the crack tip, and enhance the ability of hindering crack propagation. After tempering at 350 ℃ for 240 min, the main microstructure evolves into martensite and lath bainite, and the content of retained austenite is 14.9%, which is lower than that of hot rolled tested steel. While, after tempering at 450 ℃ for 240 min, the microstructure mainly consists of lath bainite with a small amount of martensite distributed on it, and the volume fraction of retained austenite reduces to 8.6%, which is also associated between bainite laths in thin film form, with a large number of carbides precipitated, and the crack growth rate is the slowest.

Key words: bainitic steel, heat treatment, microstructure, retained austenite, fatigue crack

中图分类号:

TG111

董瑞, 陈林, 岑耀东, 包喜荣. 不同热处理条件下贝氏体钢的微观组织和疲劳裂纹扩展[J]. 金属热处理, 2022, 47(2): 153-158.

Dong Rui, Chen Lin, Cen Yaodong, Bao Xirong. Microstructure and fatigue crack growth of a bainitic steel under different heat treatments[J]. Heat Treatment of Metals, 2022, 47(2): 153-158.

参考文献

[1]Clayton P, Devanathan R. Rolling sliding wear behavior of a chromium molybdenum rail steel in pearlitic and bainitic conditions[J]. Wear, 1992, 156(1): 121-131.
[2]张银花, 周清跃, 鲍磊, 等. 国内外高速铁路钢轨性能对比研究[J]. 中国铁道科学, 2015, 36(4): 20-26.
Zhang Yinhua, Zhou Qingyue, Bao Lei, et al. Comparative study on rail performance of high speed railway home and abroad[J]. China Railway Science, 2015, 36(4): 20-26.
[3]Hui W, Xu Z, Zhang Y, et al. Hydrogen embrittlement behavior of high strength rail steels: A comparison between pearlitic and bainitic microstructures[J]. Materials Science and Engineering A, 2017, 704: 199-206.
[4]Kang J, Zhang F C, Long X Y, et al. Low cycle fatigue behavior in a medium-carbon carbide-free bainitic steel[J]. Materials Science and Engineering A, 2016, 666: 88-93.
[5]Zhang F C, Long X Y, Kang J, et al. Cyclic deformation behaviors of a high strength carbide-free bainitic steel[J]. Materials and Design, 2016, 94: 1-8.
[6]李文亚, 杨维宇, 金自立. 国内外贝氏体钢轨综述[J]. 包钢科技, 2013, 9(6): 20-24.
Li Wenya, Yang Weiyu, Jin Zili. Review of bainitic rails at home and abroad[J]. Science and Technology of Baotou Steel, 2013, 9(6): 20-24.
[7]杨鲁明, 任慧平, 金自力, 等. 贝氏体钢轨热轧过程中再结晶行为及组织控制[J]. 热处理, 2015, 30(1): 20-23.
Yang Luming, Ren Huiping, Jin Zili, et al. Recrystallization behavior and microstructure control of bainitic steel rail during hot-rolling[J]. Heat Treatment, 2015, 30(1): 20-23.
[8]张宝祥. 贝氏体钢轨超高周疲劳行为的研究[D]. 北京: 北京交通大学, 2015.
[9]娄梦杰, 周庆飞, 陈林. 轧制参数对BGRE钢轨组织的影响[J]. 内蒙古科技大学学报, 2019, 38(1): 59-63.
Lou Mengjie, Zhou Qingfei, Chen Lin. Effect of rolling parameters on microstructure of BGRE rail[J]. Journal of Inner Mongolia University of Science and Technology, 2019, 38(1): 59-63.
[10]包喜荣, 王均安, 王晓东, 等. 一种Cr-Mo-Ni系贝氏体钢的动态再结晶行为[J]. 材料热处理学报, 2016, 37(4): 222-227.
Bao Xirong, Wang Jun'an, Wang Xiaodong, et al. Dynamic recrystallization behavior of Cr-Mo-Ni bainitic steel[J]. Transactions of Materials and Heat Treatment, 2016, 37(4): 222-227.
[11]Chen Lin, Chen Kunyu, Chang Guo. Effects of applied stress onisothermal phase transformation of austenite to pearlite in heavy rail steels: An experimental and modeling study[J]. Metallography, Microstructure, and Analysis, 2016(5): 402-410.
[12]Wang K, Tan Z, Gao G, et al. Ultra highstrength-toughness combination in bainitic rail steel: The determining role of austenite stability during tempering[J]. Materials Science and Engineering A, 2016, 662: 162-168.
[13]Hasan S M, Chakrabarti D, Singh S B. Dry rolling/sliding wear behaviour of pearlitic rail and newly developed carbide-free bainitic rail steels[J]. Wear, 2018, 408-409: 151-159.
[14]岑耀东, 陈林, 董瑞, 等. 重轨钢的组织演变及热变形行为[J]. 金属热处理, 2020, 45(11): 38-42.
Cen Yaodong, Chen Lin, Dong Rui, et al. Microstructure evolution and hot deformation behavior of a heavy rail steel[J]. Heat Treatment of Metals, 2020, 45(11): 38-42.
[15]杨维宇, 张凤明, 何建中, 等. 高强韧U20Mn2SiCrNiMo贝氏体钢轨热处理工艺的优化[J]. 特殊钢, 2020, 41(6): 28-31.
Yang Weiyu, Zhang Fengming, He Jianzhong, et al. Optimization of heat treatment process of high strength-toughness U20Mn2SiCrNiMo bainite steel rail[J]. Special Steel, 2020, 41(6): 28-31.
[16]熊志强, 徐光, 袁清, 等. 回火工艺对热轧高强贝氏体钢轨组织和力学性能的影响[J]. 武汉科技大学学报, 2018, 41(6): 410-414.
Xiong Zhiqiang, Xu Guang, Yuan Qing, et al. Effect of tempering process on the microstructure and mechanical properties of hot-rolled high-strength bainitic steel rail[J]. Journal of Wuhan University of Science and Technology, 2018, 41(6): 410-414.
[17]周清跃, 张银花, 刘丰收, 等. 高速铁路道岔钢材质及强度等级选用研究[J]. 中国铁路, 2017(8): 5-9.
Zhou Qingyue, Zhang Yinhua, Liu Fengshou, et al. Study on selection of rail material and strength level for HSR turnout[J]. China Railway, 2017(8): 5-9.
[18]Dong Rui, Lü Ke, Guo Hui, et al. Effect of annealing processes on microstructures and mechanical properties of medium Mnsteel[J]. Materials Science Forum, 2018, 817: 399-443.
[19]于洋. Mn-Si-Cr系贝/马复相高强钢超高周疲劳行为及机理研究[D]. 北京: 清华大学, 2015.
[20]于庆波. M/A岛对粒装贝氏体钢冲击韧性的影响[J]. 热加工工艺, 2012, 41(24): 41-42.
Yu Qingbo. Influence of M/A island on impact toughness of granular bainite steel[J]. Hot Working Technology, 2012, 41(24): 41-42.

不同热处理条件下贝氏体钢的微观组织和疲劳裂纹扩展

Microstructure and fatigue crack growth of a bainitic steel under different heat treatments

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]	祁晓亮, 李岩, 定巍, 赵增武. 含Al中锰TRIP钢原始组织对临界退火后组织与力学性能的影响[J]. 金属热处理, 2022, 47(4): 24-29.
[2]	陈保安, 张静媛, 祝志祥, 韩钰, 潘学东, 张磊, 陈素红. 化学成分对高强Al-Mg-Si合金组织和性能的影响[J]. 金属热处理, 2022, 47(4): 30-38.
[3]	陈东俊, 李广阳, 刘刚. 时效处理对AlSi9Cu3压铸铝合金组织和力学性能的影响[J]. 金属热处理, 2022, 47(4): 53-56.
[4]	王云龙, 余伟, 张昳, 史佳新, 李明辉. 奥氏体化温度对贝氏体钢等温转变及力学性能的影响[J]. 金属热处理, 2022, 47(4): 80-85.
[5]	李立, 曾艳, 吴晓春. 4Cr5Mo2VCo钢的热处理工艺优化[J]. 金属热处理, 2022, 47(4): 133-140.
[6]	张骥俊, 邢彦锋, 曹菊勇. 超声振动对CMT电弧增材制造铝合金组织与性能的影响[J]. 金属热处理, 2022, 47(4): 159-164.
[7]	王方军, 王东哲, 万红, 时瑶, 沈涛. 热处理和冷变形量对定膨胀合金4J32C线膨胀系数的影响[J]. 金属热处理, 2022, 47(4): 199-203.
[8]	王绍灼, 孟晗, 王芬, 樊海卫, 李燕, 唐超. 改善低氧TC4-LC及重熔TC4钛合金性能的热处理工艺[J]. 金属热处理, 2022, 47(4): 204-207.
[9]	苏勇, 王帅, 王吉星, 于兴福, 刘洪秀, 刘金玲. 复合化学热处理对G13Cr4Mo4Ni4V钢组织和硬度的影响[J]. 金属热处理, 2022, 47(4): 226-230.
[10]	王敬元, 吴松全, 张博华, 辛社伟, 杨义, 王皞, 黄爱军. 固溶时效处理对BT25y钛合金显微组织及硬度的影响[J]. 金属热处理, 2022, 47(3): 14-19.
[11]	陈连生, 房宁, 曹仲乾, 杨子旋, 李红斌, 潘红波, 田亚强. 压下率对两相区温轧淬火配分中锰钢组织性能的影响[J]. 金属热处理, 2022, 47(3): 28-33.
[12]	杨春苗, 王珊, 王淑慧, 李延珍, 刘文文. RRA过程中预时效时间对7A85铝合金组织性能的影响[J]. 金属热处理, 2022, 47(3): 44-47.
[13]	刘志桥, 冯庆晓, 李化龙, 李腾飞. 退火工艺对低碳贝氏体钢组织与力学性能的影响[J]. 金属热处理, 2022, 47(3): 53-56.
[14]	樊洋, 杨明华, 陈凯敏, 孙丙岩. 焊后热处理对31CrMoV9钢电子束焊接接头组织及性能的影响[J]. 金属热处理, 2022, 47(3): 57-60.
[15]	陈善勇, 王快社, 乔柯, 王文. 碱热处理对搅拌摩擦加工AZ31镁合金耐腐蚀性能的影响[J]. 金属热处理, 2022, 47(3): 61-66.