ART退火后冷却方式对0.1C-7.2Mn钢加工硬化行为的影响

doi:10.13251/j.issn.0254-6051.2022.07.010

金属热处理 ›› 2022, Vol. 47 ›› Issue (7): 58-62.DOI: 10.13251/j.issn.0254-6051.2022.07.010

ART退火后冷却方式对0.1C-7.2Mn钢加工硬化行为的影响

王思超¹, 徐海卫², 徐勇^1,3, 韩赟², 郑小平¹, 李红斌¹, 田亚强¹, 陈连生¹

1.华北理工大学教育部现代冶金技术重点实验室, 河北唐山 063210;
2.首钢京唐钢铁联合有限责任公司技术中心, 河北唐山 063200;
3.中国科学院金属研究所师昌绪先进材料创新中心, 辽宁沈阳 110016

收稿日期:2022-02-11 修回日期:2022-05-09 出版日期:2022-07-25 发布日期:2022-08-12
通讯作者: 田亚强,博士,教授,E-mail:tyqwylfive@163.com
作者简介:王思超(1996—),男,硕士研究生,主要研究方向为材料加工新技术与组织性能控制,E-mail:1054108990@qq.com。
基金资助:
河北省自然科学基金(E2020209124, E2020209127);河北省自然科学基金重点项目(E2002209049);河北省科技厅重点研发计划(20311004D)

Effect of cooling methods after ART annealing on work hardening behavior of 0.1C-7.2Mn steel

Wang Sichao¹, Xu Haiwei², Xu Yong^1,3, Han Yun², Zheng Xiaoping¹, Li Hongbin¹, Tian Yaqiang¹, 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. Technology Center, Shougang Jingtang United Iron & Steel Co., Ltd., Tangshan Hebei 063200, China;
3. China Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang Liaoning 110016, China

Received:2022-02-11 Revised:2022-05-09 Online:2022-07-25 Published:2022-08-12

摘要/Abstract

摘要： 以0.1C-7.2Mn热轧和冷轧中锰钢为研究对象,采用扫描电镜(SEM)、X射线衍射仪(XRD)、室温拉伸试验等手段,研究了奥氏体逆相变(ART)退火后不同冷却方式对中锰钢加工硬化行为的影响。结果表明,热轧试验钢ART退火后得到板条状铁素体-奥氏体组织,退火后空冷试样中有大量碳化物析出,而水冷抑制了碳化物析出。冷轧试验钢ART退火后得到了等轴状铁素体-奥氏体组织,退火后空冷试样表现为连续屈服,而水冷促进了组织的等轴化;热轧试样获得更高体积分数的残留奥氏体,获得了优异的力学性能;残留奥氏体体积分数越大,拉伸变形过程中发生的TRIP效应越持久,提供更高、更持续的加工硬化。

关键词: 中锰钢, 冷却方式, 加工硬化, 残留奥氏体, TRIP效应

Abstract: Taking 0.1C-7.2Mn hot rolled and cold rolled medium manganese steel as the research object, the effect of different cooling methods after ART annealing on work hardening behavior of the medium manganese steel were studied by means of scanning electron microscope (SEM), X-ray diffraction (XRD) and room temperature tensile test. The results show that lath ferrite austenite structure is obtained in the hot rolled steel after ART annealing, and a large number of carbides precipitate in the air-cooled specimens, while water cooling inhibits carbides precipitation. The equiaxed ferrite and austenite micro structure is obtained in the cold rolled steel after ART annealing, and the air-cooled specimens shows continuous yield, and water cooling promots the equiaxed microstructure. Higher volume fraction of retained austenite is obtained in the hot rolled specimens, which show a excellent mechanical properties. The larger the volume fraction of retained austenite, the longer the TRIP effect during tensile deformation, providing higher and more sustained work hardening.

Key words: medium manganese steel, cooling methods, work hardening, retained austenite, TRIP effect

中图分类号:

TG142

王思超, 徐海卫, 徐勇, 韩赟, 郑小平, 李红斌, 田亚强, 陈连生. ART退火后冷却方式对0.1C-7.2Mn钢加工硬化行为的影响[J]. 金属热处理, 2022, 47(7): 58-62.

Wang Sichao, Xu Haiwei, Xu Yong, Han Yun, Zheng Xiaoping, Li Hongbin, Tian Yaqiang, Chen Liansheng. Effect of cooling methods after ART annealing on work hardening behavior of 0.1C-7.2Mn steel[J]. Heat Treatment of Metals, 2022, 47(7): 58-62.

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ART退火后冷却方式对0.1C-7.2Mn钢加工硬化行为的影响

Effect of cooling methods after ART annealing on work hardening behavior of 0.1C-7.2Mn steel

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