Effect of V on the Precipitation Behavior of Ti-Mo Microalloyed High-Strength Steel

被引：13
作者：
Han, Ruyang [1 ]
Yang, Gengwei [1 ]
Xu, Deming [1 ]
Jiang, Lu [2 ]
Fu, Zhixiang [1 ]
Zhao, Gang [1 ]
机构：
[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China
[2] Deakin Univ, Inst Frontier Mat Geelong, Waurn Ponds, Vic 3216, Australia
来源：
MATERIALS | 2022年 / 15卷 / 17期
关键词：
high-strength ferritic steel; Ti-Mo-V complex microalloying; thermodynamics of precipitation; kinetics for precipitation; precipitation behavior; MECHANICAL-PROPERTIES; INTERPHASE PRECIPITATION; MICROSTRUCTURAL EVOLUTION; ROLLING TEMPERATURE; NB; MOLYBDENUM; TITANIUM; VANADIUM; FERRITE; SHEET;
D O I：
10.3390/ma15175965
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, the precipitates in Ti-Mo-V steel were systematically characterized by high-resolution transmission electron microscopy (HRTEM). The thermodynamics and kinetics of precipitates in Ti-Mo and Ti-Mo-V steels were theoretically analyzed, and the effect of vanadium on the precipitation behavior was clarified. The results showed that the precipitation volume fraction of the Ti-Mo-V steel was significantly higher than that of Ti-Mo steel. The randomly dispersed precipitation and interphase precipitation (Ti, Mo, V)C particles coexisted in the Ti-Mo-V steel. When the temperature was higher than 872 degrees C, the addition of vanadium could increase the driving force for (Ti, Mo, V)C precipitation in austenite, resulting in an increased nucleation rate and shortened incubation period, promoting the (Ti, Mo, V)C precipitation. When the temperature was lower than 872 degrees C, the driving force for (Ti, Mo, V)C precipitation in austenite was lower than that for (Ti, Mo)C precipitation, and the incubation period of (Ti, Mo, V)C precipitation was increased. Moreover, it was also found that the precipitated-time-temperature curve of (Ti, Mo, V)C precipitated in the ferrite region was "C" shaped, but that of (Ti, Mo)C was "epsilon" shaped, and the incubation period of (Ti, Mo, V)C was significantly shorter than that of (Ti, Mo)C.
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页数：12
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