| 低碳高强舰船用钢固溶时效后的组织与性能 |
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| 引用本文： | 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. DOI: 10.13251/j.issn.0254-6051.2022.07.006 |
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| 作者姓名： | 李梦欢 张露友 徐海卫 董欣欣 杨子旋 田亚强 陈连生 |
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| 作者单位： | 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 |
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| 基金项目： | 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) |
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| 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。
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| 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 |
| 收稿时间： | 2022-02-09 |
Microstructure and properties of low carbon high strength ship steel after solution and aging treatment |
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| 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. DOI: 10.13251/j.issn.0254-6051.2022.07.006 |
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| Authors: | Li Menghuan Zhang Luyou Xu Haiwei Dong Xinxin Yang Zixuan Tian Yaqiang Chen Liansheng |
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| 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. |
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| Keywords: | low carbon high strength ship steel solution and aging treatment impact absorbed energy yield strength elongation |
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