低温卷取热轧双相钢的显微组织及疲劳性能

doi:10.13251/j.issn.0254-6051.2021.05.008

金属热处理 ›› 2021, Vol. 46 ›› Issue (5): 55-59.DOI: 10.13251/j.issn.0254-6051.2021.05.008

低温卷取热轧双相钢的显微组织及疲劳性能

赵楠, 刘学伟, 孙明军, 薛军

宝钢股份中央研究院梅钢技术中心, 江苏南京 210039

收稿日期:2020-10-24 出版日期:2021-05-25 发布日期:2021-07-21
作者简介:赵楠(1977—),女,高级工程师,硕士,主要研究方向为金属材料相关机理,E-mail:4174208@qq.com。

Microstructure and fatigue properties of low temperature coiling hot-rolled dual phase steel

Zhao Nan, Liu Xuewei, Sun Mingjun, Xue Jun

Technology Center for Meisteel, Baosteel Central Research Institute, Nanjing Jiangsu 210039, China

Received:2020-10-24 Online:2021-05-25 Published:2021-07-21

摘要/Abstract

摘要： 采用扫描电镜、拉-拉疲劳试验机等研究了低温卷取热轧双相钢的显微组织及疲劳性能。结果表明:热轧双相试验钢的疲劳极限约为530 MPa;低温卷取工艺生产的热轧双相试验钢夹杂物平均尺寸多在5 μm以下,晶粒比较细小,马氏体组织较细小且弥散均匀分布,具有良好的综合力学性能。热轧双相试验钢疲劳裂纹源位于样品表面的棱角处,疲劳裂纹扩展区上有大量的韧窝、撕裂棱、疲劳辉纹和二次裂纹,瞬断区以浅韧窝为主,由于铁素体和马氏体发生不同程度的应变,最终二次裂纹在铁素体和马氏体的相界面萌生。二次裂纹虽然萌生但并未扩展,大量二次裂纹分散主裂纹尖端应力集中,可有效降低裂纹扩展的驱动力,降低疲劳裂纹扩散速率,抑制疲劳裂纹扩展,使疲劳强度得到提升。

关键词: 双相钢, 低温卷取, 显微组织, 疲劳性能, 电子背散射衍射(EBSD)

Abstract: Microstructure and fatigue properties of low temperature coiling hot-rolled dual phase steel were studied by using SEM and tension-tension fatigue tests. The results show that the fatigue limit of the hot-rolled dual phase steel is approximately 530 MPa. The average size of inclusion of the hot-rolled dual phase steel produced by low temperature coiling is less than 5 μm, with small grain and tiny uniformly distributed martensite, which leads to good comprehensive mechanical propertles. The source of fatigue crack in the hot-rolled dual phase steel is located on the edge of specimen surface. There are plenty of dimples, tearing ridges, fatigue striations and secondary cracks in fatigue crack growth zone. Fatigue final rupture region mainly consists of superficial dimples. Different degree of strain occurred in ferrite and martensite finally results in the born of secondary cracks on the phase interface of ferrite and martensite. The secondary cracks are borned but don't grow. Large number of secondary cracks disperse the stress concentration at the tip of main cracks, which can effectively reduce the driving force of crack growth, slow down the fatigue crack propagation rate, and restrain fatigue crack propagation and finally improve the fatigue properties.

Key words: dual phase steel, low temperature coiling, microstructure, fatigue properties, EBSD

中图分类号:

TG156

赵楠, 刘学伟, 孙明军, 薛军. 低温卷取热轧双相钢的显微组织及疲劳性能[J]. 金属热处理, 2021, 46(5): 55-59.

Zhao Nan, Liu Xuewei, Sun Mingjun, Xue Jun. Microstructure and fatigue properties of low temperature coiling hot-rolled dual phase steel[J]. Heat Treatment of Metals, 2021, 46(5): 55-59.

参考文献

[1]赵楠, 刘学伟, 孙明军, 等. 600 MPa级热轧双相钢组织及扩孔性能的研究[J]. 热加工工艺, 2018, 47(23): 60-62.
Zhao Nan, Liu Xuewei, Sun Mingjun, et al. Study on microstructure and hole-expanding property of 600 MPa grade hot-rolled dual phase steel[J]. Hot Working Technology, 2018, 47(23): 60-62.
[2]刘斌, 吴润, 王孟, 等. 高强度热轧双相钢的低周疲劳性能[J]. 钢铁研究学报, 2017, 29(8): 667-670.
Liu Bin, Wu Run, Wang Meng, et al. Low cycle fatigue properties of hot-rolled high strength dual phase steel[J]. Journal of Iron and Steel Research, 2017, 29(8): 667-670.
[3]翟士斌, 余万华, 周斌斌, 等. Mo元素对热轧双相钢DP600相变规律影响[J]. 材料热处理学报, 2015, 36(11): 54-59.
Zhai Shibin, Yu Wanhua, Zhou Binbin, et al. Effect of Mo element on phase transformation behavior of hot rolled dual phase steel DP600[J]. Transactions of Materials and Heat Treatment, 2015, 36(11): 54-59.
[4]孙明军, 赵楠, 夏小明. 600 MPa级热轧双相钢分段冷却精度控制及组织性能研究[J]. 热加工工艺, 2017, 46(7): 169-172.
Sun Mingjun, Zhao Nan, Xia Xiaoming. Study on stage cooling precision control and microstructure and properties of 600 MPa grade hot rolled dual phase steel[J]. Hot Working Technology, 2017, 46(7): 169-172.
[5]乔桂英, 唐雷, 张文雷, 等. 铁素体/贝氏体双相X80管线钢疲劳性能研究[J]. 燕山大学学报, 2015, 39(6): 502-505.
Qiao Guiying, Tang Lei, Zhang Wenlei, et al. Study on fatigue property of ferrite/bainite duple phases X80 pipeline steel[J]. Journal of Yanshan University, 2015, 39(6): 502-505.
[6]李建新, 罗志强, 程世超, 等. 16Cr3NiWMoVNbE齿轮钢的疲劳性能与裂纹萌生[J]. 金属热处理, 2020, 45(7): 167-172.
Li Jianxin, Luo Zhiqiang, Cheng Shichao, et al. Fatigue performance and crack initiation of 16Cr3NiWMoVNbE gear steel[J]. Heat Treatment of Metals, 2020, 45(7): 167-172.
[7]邓洁, 马佳伟, 许以阳, 等. 马氏体的分布对双相钢微观变形行为和力学性能的影响[J]. 金属学报, 2015, 51(9): 1092-1100.
Deng Jie, Ma Jiawei, Xu Yiyang, et al. Effect of martensite distribution on microscopic deformation behavior and mechanical properties of dual phase steels[J]. Acta Metallurgica Sinica, 2015, 51(9): 1092-1100.
[8]刘学伟, 赵楠. 600 MPa级热轧双相钢组织与性能优化分析[J]. 钢铁, 2017, 52(1): 87-91.
Liu Xuewei, Zhao Nan. Microstructure and properties optimization of hot rolled 600 MPa dual phase steel[J]. Iron Steel, 2017, 52(1): 87-91.

[1]	张子延, 陈君, 陈晓亚, 李全安, 刘建鑫. 固溶时效处理对Mg-4Sm-3Gd-0.5Zr合金显微组织和耐蚀性能的影响[J]. 金属热处理, 2022, 47(4): 10-16.
[2]	梁恩溥, 徐乐, 杨勇, 王毛球. 添加Al、Cu对40CrNi3MoV钢组织和力学性能的影响[J]. 金属热处理, 2022, 47(4): 17-23.
[3]	陈连生, 张露友, 田亚强, 杨子旋, 李红斌, 潘红波, 魏英立. 低碳高强舰船用钢的CCT曲线及其组织性能[J]. 金属热处理, 2022, 47(4): 63-68.
[4]	王琪, 吴光亮. 回火温度对1100 MPa级高强钢组织与性能的影响[J]. 金属热处理, 2022, 47(4): 146-150.
[5]	孙凯, 陈研, 杨绍斌. 时效温度对激光选区熔化TC21钛合金微观组织及硬度的影响[J]. 金属热处理, 2022, 47(4): 155-158.
[6]	刘文彬, 乔龙阳, 潘新宇, 程格, 李爱娜, 裴新军. 淬火温度对刀剪用M390粉末冶金不锈钢组织和性能的影响[J]. 金属热处理, 2022, 47(4): 189-195.
[7]	王瑞琴, 葛鹏, 廖强, 侯鹏, 刘宇. 固溶冷却方式对短时用高温钛合金板材组织和性能的影响[J]. 金属热处理, 2022, 47(4): 196-198.
[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]	张宁, 高星, 王芝林, 蒋波, 刘雅政. 18CrNiMo7-6钢齿轮组织性能异常分析[J]. 金属热处理, 2022, 47(4): 268-273.
[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]	孙建, 黄贞益, 李景辉, 王萍. 固溶和时效处理对Fe-Mn-Al-C轻质钢组织和硬度的影响[J]. 金属热处理, 2022, 47(3): 34-38.
[12]	王方军, 刘应龙, 时瑶, 万红, 刘斌斌. 等温退火处理对Inconel 625合金箔材组织和性能的影响[J]. 金属热处理, 2022, 47(3): 77-81.
[13]	张曼雪, 景然, 张雄, 张晴, 吴倩, 刘以柔. 铸态Ti-20Zr-10Nb-xMo合金的微观组织和耐腐蚀性能[J]. 金属热处理, 2022, 47(3): 147-150.
[14]	宁静, 高坤元, 李浩楠, 文胜平, 黄晖, 吴晓蓝, 魏午, 聂祚仁. 成分和冷却速度对Al-xEr合金凝固组织的影响[J]. 金属热处理, 2022, 47(3): 151-154.
[15]	王荣, 龚玉辉, 殷学俊, 魏德强. 多道电子束扫描搭接率对40Cr钢组织与性能的影响[J]. 金属热处理, 2022, 47(3): 191-197.

低温卷取热轧双相钢的显微组织及疲劳性能

Microstructure and fatigue properties of low temperature coiling hot-rolled dual phase 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