Effect of In Situ Nano-Particles on the Microstructure and Mechanical Properties of Ferritic Steel

被引：5
|
作者：
Niu, Yawei [1 ]
Tang, Hao [1 ]
Wang, Yanlin [1 ]
Chen, Xiaohua [2 ]
Wang, Zidong [1 ]
Chen, Kaixuan [1 ]
Wu, Yi [3 ]
Liu, Xingui [3 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[3] China Acad Railway Sci, Met & Chem Res Inst, Beijing 100081, Peoples R China
来源：
STEEL RESEARCH INTERNATIONAL | 2016年 / 87卷 / 11期
基金：
中国博士后科学基金;
关键词：
nano-particle; titanium oxide; structure optimization; precipitation hardening; MICROALLOYED HSLA STEELS; HOT-ROLLED TI; HIGH-STRENGTH; ALUMINUM; INOCULANTS; NUCLEATION; TOUGHNESS; ALLOYS; MELT;
D O I：
10.1002/srin.201600100
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Transmission electron microscopy (TEM), optic microscopy (OM), and small-angle-X-ray-scattering(SAXS) are combined to comprehensively characterize the effect of endogenous nano-particles obtained by a new method, on microstructure and mechanical properties of the ferritic steel. Morphology of nano-particles, the change of microstructure, and the performance of steel are systematically studied. Results indicate that the endogenous nano-particles are titanium oxide which not only has a positive effect on refining the structure of ferrite steel, but also can significantly improve its strength without much losing its plasticity. Tensile tests reveal that tensile strength and yield strength of the investigated steel are increased from the original 392 and 247 MPa to 524 and 430 MPa, respectively. However, the value of the elongation-to-failure is only decreased by 3%, reached to 25% ultimately.
引用
收藏
页码：1389 / 1394
页数：6
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