两阶段轧制变形与时效下超细铁素体/马氏体双相钢的微观组织演变
Microstructure Evolution of Ultrafine Ferrite/Martensitic Dual Phase Steel in Two-stage Rolling Deformation and Aging State
邢磊 1王成猛 2高雪云 1马才女 1翟亭亭 1王海燕1
作者信息
- 1. 内蒙古科技大学 材料与冶金学院 内蒙古自治区新金属材料重点实验室,内蒙古 包头 014010
- 2. 北京科技大学材料科学与工程学院,北京 100083
- 折叠
摘要
对含铜低合金高强钢进行了两阶段轧制变形及时效处理,形成了超细晶铁素体/马氏体双相组织.利用扫描电子显微镜与电子背散射衍射技术分析了不同工艺下双相钢的微观组织演变规律,结合力学性能测试讨论了细晶强化与纳米相析出的协同强化增韧机理.结果表明,经过上述变形和时效处理,得到具有良好的强塑性结合的超细晶铁素体/马氏体双相钢,其晶粒平均尺寸为1.23 μm.随着时效时间延长,细小的第二相弥散析出并均匀分布,使得实验钢的屈服强度提高.
Abstract
Two-stage rolling deformation and aging treatment were carried out for the copper-containing low-alloy high-strength steel,which formed an ultra-fine-grained ferrite/martensite dual-phase structure.Scanning electron microscopy and electron backscatter diffraction were used to analyze the microstructure evolution of dual-phase steel under different processes.Combined with mechanical properties testing,the mechanism of synergistic strengthening and toughening of fine crystal strengthening and nanophase precipitation was discussed.The results show that after the above-mentioned deformation and aging treatment,the obtained ultrafine-grained ferrite/martensitic dual-phase steel has a good strength-plasticity combination,and the average grain size is 1.23 μm.With the prolonging of aging time,the fine second phase is dispersively precipitated and evenly distributed,which increases the yield strength of the experimental steel.
关键词
两阶段轧制变形/双相钢/超细晶/析出相Key words
two-stage rolling deformation/dual-phase steel/ultrafine grain/precipitates引用本文复制引用
基金项目
国家自然科学基金(51764047)
内蒙古自治区高等学校青年科技英才支持计划(NJYT-19-A21)
出版年
2024
NETL
NSTL
万方数据