Precipitation Behavior and Microstructural Evolution of Ferritic Ti–V–Mo Complex Microalloyed Steel

Zhang, Ke; Wang, Hui; Sun, Xinjun; Sui, Fengli; Li, Zhaodong; Pu, Enxiang; Zhu, Zhenghai; Huang, Zhenyi; Pan, Hongbo; Yong, Qilong

doi:10.1007/s40195-018-0726-4

Cited by 25 publications

(7 citation statements)

References 18 publications

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“…Preliminary research shows [23] that Ti-V-Mo composite microalloy steel has the maximum nucleation rate when it is held at about 630°C, and significant precipitation strengthening effect can be achieved. Therefore, this paper designs Ti-V-Mo composite microalloyed steel to hold at 630°C for different times, focuses on observing and analyzing the interactive changes of microstructure, precipitates and hardness and expounds the reasons affecting the hardness changes, in order to provide theoretical guidance for improving the precipitation strengthening increment and improving the mechanical properties of Ti-V-Mo composite microalloyed steel.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Effect of interrupted cooling time on microstructure transformation and hardness of Ti–V–Mo composite microalloyed steel

Xiaoli

Guo²

2022

Ironmaking & Steelmaking

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Effect of interrupted cooling time on microstructure transformation, precipitation behaviour and hardness of a Ti-V-Mo microalloyed steel was investigated by means of OM, SEM, TEM and Vickers hardness tester, and the factors influencing the hardness change were discussed. The results reveal that when the Ti-V-Mo microalloyed steel after austenitization is isothermally cooled at 630°C from 0 to 3 h, with the increase of interrupted time, the proportion of ferrite in the matrix increases while the proportion of martensite and bainite decreases. In addition, the hardness increases first and then becomes stable, then re-increases and finally declines slightly. At the interrupted time ranging from 60 to 1200 s, the hardness plateau occurs because the precipitation strengthening effect of (Ti, V, Mo) C nano-particles can compensate for the hardness loss caused by matrix softening due to phase transformation. When the interrupted time is 3600 s, the maximum hardness is 457HV, and the precipitation strengthening effect of (Ti, V, Mo) C nanoparticles is the best.

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Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Effect of interrupted cooling time on microstructure transformation and hardness of Ti–V–Mo composite microalloyed steel

Xiaoli

Guo²

2022

Ironmaking & Steelmaking

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“…The mass fraction of M(C, N) phase was measured using chemical phase analysis [32,33]. The structure of M(C, N) precipitates was identified by X-ray diffraction.…”

Section: Verification Experiments and Resultsmentioning

confidence: 99%

Effect of electropulsing on the precipitation of NbC_xN_1−x from austenite phase

Zhu

Dong

Zhou

et al. 2020

Materials Science and Technology

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The precipitation of NbC xN1− x significantly affects the high-temperature mechanical properties of Nb microalloyed steel. The control of the precipitation behaviour of NbC xN1− x is the key, especially the nucleation and precipitation from Nb solid solution. We explore to use electropulsing to promote the precipitation of NbC xN1− x through thermodynamic model, chemical phase analysis, XRD and TEM. The modelling research show that electropulsing intensity significantly promotes the nucleation of NbC xN1− x in austenite phase. The higher the electropulsing temperature is, the better the promotion effect is. The chemical phase analysis and XRD investigation results show that electropulsing can increase the amount of precipitation of NbC xN1− x by 50% at 950°C compared to the precipitation without electropulsing.

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“…The diffusion process of substitutional solid solution atoms, which is slow, becomes a controlling factor that affects the particle coarsening process. 30 In substitutional solid solution atoms, the diffusion coefficient of Zr atoms in austenite is much lower than that of Ti atoms, 31,32 and the atomic diffusion process is influenced by the interaction between Zr and Ti atoms, which suppresses the coarsening process of the second phase large particles. Therefore, the average particle size of (Ti, Zr)C particles at high temperatures is smaller than that of TiC, and the number of stable particles at high temperatures is higher than that of TiC.…”

Section: Effect Of Zr On Austenite Grains Growth Behaviourmentioning

confidence: 99%

Effect of Zr on austenite grains growth behaviour of high strength Ti microalloyed low carbon steel

Luo,

Xiong,

Wang

et al. 2024

Ironmaking & Steelmaking: Processes, Products and Applicati

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The isothermal grain growth behaviour for three Ti microalloyed steels with different Zr contents (0–0.039 wt-%) at different reheating temperatures (1100, 1150, 1200 and 1250 °C) and for holding times (10, 60, 600 and 1800 s) was investigated. Austenite growth model was established to analyse and predict the functional relationship between austenite grains size and austenitising temperature and time during the isothermal austenitising process in the three tested steels, and the influence of Zr was discussed. The results indicate that the activation energy Q and time index n of austenite grains boundary migration in the tested steels decrease with the increase of Zr content. The addition of Zr can inhibit the growth of primary austenite grains at high temperatures. With the increase of Zr content, the trend of average grain size growth of primary austenite becomes smoother. The addition of Zr improves the high-temperature stability of precipitates, resulting in smaller precipitates and stronger pinning effect for austenite grains boundary in Ti–Zr microalloyed steel compared to that in Ti microalloyed steel at high temperatures.

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Precipitation Behavior and Microstructural Evolution of Ferritic Ti–V–Mo Complex Microalloyed Steel

Cited by 25 publications

References 18 publications

RETRACTED ARTICLE: Effect of interrupted cooling time on microstructure transformation and hardness of Ti–V–Mo composite microalloyed steel

RETRACTED ARTICLE: Effect of interrupted cooling time on microstructure transformation and hardness of Ti–V–Mo composite microalloyed steel

Effect of electropulsing on the precipitation of NbC_xN_1−x from austenite phase

Effect of Zr on austenite grains growth behaviour of high strength Ti microalloyed low carbon steel

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Precipitation Behavior and Microstructural Evolution of Ferritic Ti–V–Mo Complex Microalloyed Steel

Cited by 25 publications

References 18 publications

RETRACTED ARTICLE: Effect of interrupted cooling time on microstructure transformation and hardness of Ti–V–Mo composite microalloyed steel

RETRACTED ARTICLE: Effect of interrupted cooling time on microstructure transformation and hardness of Ti–V–Mo composite microalloyed steel

Effect of electropulsing on the precipitation of NbCxN1−x from austenite phase

Effect of Zr on austenite grains growth behaviour of high strength Ti microalloyed low carbon steel

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Product

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About

Effect of electropulsing on the precipitation of NbC_xN_1−x from austenite phase