过时效温度对连续退火制备DP1180钢组织性能的影响

doi:10.13251/j.issn.0254-6051.2023.01.026

金属热处理 ›› 2023, Vol. 48 ›› Issue (1): 149-154.DOI: 10.13251/j.issn.0254-6051.2023.01.026

过时效温度对连续退火制备DP1180钢组织性能的影响

张家豪¹, 陈连生¹, 高天洋¹, 徐海卫², 韩赟², 李红斌¹, 田亚强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

收稿日期:2022-09-07 修回日期:2022-11-16 出版日期:2023-01-25 发布日期:2023-02-03
通讯作者: 李红斌,副教授,博士,E-mail:lihongbinxp@126.com
作者简介:张家豪(1999—),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:1612567427@qq.com。
基金资助:
河北省科技厅重点研发计划(20311004D);河北省自然科学基金高端钢铁冶金联合基金(E2020209124,E2020209127,E2020209040);河北省自然科学基金重点项目(E2022209049)

Effect of over-aging temperature on microstructure and properties of DP1180 steel under continuous annealing process

Zhang Jiahao¹, Chen Liansheng¹, Gao Tianyang¹, Xu Haiwei², Han Yun², Li Hongbin¹, Tian Yaqiang¹

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 Iron and Steel United Co., Ltd., Tangshan Hebei 063200, China

Received:2022-09-07 Revised:2022-11-16 Online:2023-01-25 Published:2023-02-03

摘要/Abstract

摘要： 通过扫描电镜(SEM)、X射线衍射(XRD)和室温拉伸等技术对DP1180钢的微观结构和力学性能进行了表征。结果表明,冷轧退火后钢的微观组织主要由铁素体(F)、马氏体(M)和少量贝氏体组成。在230 ℃过时效处理时,马氏体主要呈板条状,铁素体呈多边形,粒状贝氏体含量较少。随着过时效温度的升高,板条状马氏体含量减少,粒状贝氏体增加,碳化物明显增加。随过时效温度的不断上升,抗拉强度降低,伸长率增加。过时效温度为270 ℃时,抗拉强度为1255.0 MPa,伸长率为11.39%,强塑积为14.29 GPa·%,综合力学性能最佳。DP1180钢的合理的过时效温度区间为230~306.8 ℃。

关键词: 连退工艺, 过时效温度, DP1180钢, 显微组织, 力学性能

Abstract: Microstructure and mechanical properties of the DP1180 steel were characterized by means of scanning electron microscopy (SEM), X-ray diffraction (XRD) and room temperature tensile techniques. The results show that microstructure of cold-rolled annealed steel is mainly composed of ferrite (F), martensite (M) and a small amount of bainite. When over-aged at 230 ℃, the martensite is mainly lath-like, the ferrite is polygonal, and the content of granular bainite is less. With the increase of over-aging temperature, the content of lath-like martensite decreases, granular bainite increases and carbides increase obviously. With the increase of over-aging temperature, the tensile strength decreases and the elongation increases. When the over-aging temperature is 270 ℃, the tensile strength is 1255.0 MPa, the elongation is 11.39%, and the product of strength and elongation is 14.29 GPa·%, and the comprehensive mechanical properties are the best. The reasonable over-aging temperature range of the DP1180 steel should be 230-306.8 ℃.

Key words: continuous annealing process, over-aging temperature, DP1180 steel, microstructure, mechanical properties

中图分类号:

TG156.1

张家豪, 陈连生, 高天洋, 徐海卫, 韩赟, 李红斌, 田亚强. 过时效温度对连续退火制备DP1180钢组织性能的影响[J]. 金属热处理, 2023, 48(1): 149-154.

Zhang Jiahao, Chen Liansheng, Gao Tianyang, Xu Haiwei, Han Yun, Li Hongbin, Tian Yaqiang. Effect of over-aging temperature on microstructure and properties of DP1180 steel under continuous annealing process[J]. Heat Treatment of Metals, 2023, 48(1): 149-154.

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过时效温度对连续退火制备DP1180钢组织性能的影响

Effect of over-aging temperature on microstructure and properties of DP1180 steel under continuous annealing process

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