低碳高强舰船用钢固溶时效后的组织与性能

doi:10.13251/j.issn.0254-6051.2022.07.006

金属热处理 ›› 2022, Vol. 47 ›› Issue (7): 34-39.DOI: 10.13251/j.issn.0254-6051.2022.07.006

低碳高强舰船用钢固溶时效后的组织与性能

李梦欢¹, 张露友¹, 徐海卫², 董欣欣³, 杨子旋⁴, 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.唐山科技职业技术学院材料工程系, 河北唐山 063000;
4.宁波大学冲击与安全工程教育部重点实验室, 浙江宁波 315211

收稿日期:2022-02-09 修回日期:2022-05-05 出版日期:2022-07-25 发布日期:2022-08-12
通讯作者: 田亚强(1980—),教授,硕士生导师,E-mail:tyqwylfive@163.com
作者简介:李梦欢(1995—),女,硕士研究生,主要研究方向为金属的强韧化,E-mail:3152016054@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重点项目(E2022209049);河北省自然科学基金高端钢铁冶金联合基金(E2020209127);河北省高等学校科学技术研究项目(ZC2021255)

Microstructure and properties of low carbon high strength ship steel after solution and aging treatment

Li Menghuan¹, Zhang Luyou¹, Xu Haiwei², Dong Xinxin³, Yang Zixuan⁴, 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. Department of Materials Engineering, Tangshan Vocational and Technical College, Tangshan Hebei 063000, China;
4. Key Laboratory of Impact and Safety Engineering, Ministry of Education of China, Ningbo University, Ningbo Zhejiang 315211, China

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

摘要/Abstract

摘要： 采用扫描电镜、EDS分析、拉伸和低温冲击试验等研究了低碳舰船高强钢在固溶和不同温度时效处理后的显微组织和力学性能。结果表明:试验钢在900 ℃保温30 min固溶处理后的显微组织为多边形铁素体和贝氏体/马氏体,屈服强度和抗拉强度较低,分别为505 MPa和625 MPa。随着时效温度的升高,试验钢的强度出现了先升高后降低的变化趋势,在时效温度为500 ℃时的抗拉强度和屈服强度最高,分别为783 MPa和747 MPa,断后伸长率为11.5%,-20 ℃的冲击吸收能量为96 J。

关键词: 低碳高强度舰船钢, 固溶时效处理, 冲击吸收能量, 屈服强度, 伸长率

Abstract: Microstructure and mechanical properties of a low carbon high strength ship steel after solid solution and different temperature aging treatments were studied by means of SEM, EDS, tensile test and low temperature impact test. The results show that the microstructure of the steel after solution treatment at 900 ℃ h for 30 min is composed of polygonal ferrite and bainite/martensite, and the yield strength and tensile strength are 505 MPa and 625 MPa respectively. With the increases of aging temperature, the strength of the steel increases first and then decreases, the tensile strength and yield strength are the highest when the aging temperature is 500 ℃, which are 783 MPa and 747 MPa respectively, the elongation after fracture is 11.5%, and the impact absorbed energy at -20 ℃ is 96 J.

Key words: low carbon high strength ship steel, solution and aging treatment, impact absorbed energy, yield strength, elongation

中图分类号:

TG142.1

李梦欢, 张露友, 徐海卫, 董欣欣, 杨子旋, 田亚强, 陈连生. 低碳高强舰船用钢固溶时效后的组织与性能[J]. 金属热处理, 2022, 47(7): 34-39.

Li Menghuan, Zhang Luyou, Xu Haiwei, Dong Xinxin, Yang Zixuan, Tian Yaqiang, Chen Liansheng. Microstructure and properties of low carbon high strength ship steel after solution and aging treatment[J]. Heat Treatment of Metals, 2022, 47(7): 34-39.

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低碳高强舰船用钢固溶时效后的组织与性能

Microstructure and properties of low carbon high strength ship steel after solution and aging treatment

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