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1.23μm。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。
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 1.23μm.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.
作者
邢磊
王成猛
高雪云
马才女
翟亭亭
王海燕
XING Lei;WANG Chengmeng;GAO Xueyun;MA Cainyu;ZHAI Tingting;WANG Haiyan(Key Laboratory of Advanced Metals and Materials of Inner Mongolia,School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China;School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《热加工工艺》
北大核心
2024年第1期90-94,共5页
Hot Working Technology
基金
国家自然科学基金资助项目(51764047)
内蒙古自治区高等学校青年科技英才支持计划资助项目(NJYT-19-A21)。
关键词
两阶段轧制变形
双相钢
超细晶
析出相
two-stage rolling deformation
dual-phase steel
ultrafine grain
precipitates
