Synergistic Effects of Ti and Mo on the Microstructure and Properties of Low-Cost Fire-Resistant and Weather-Resistant Construction Steel

Zhang, Zhihui; Niu, Gang; Li, Jing; Zhang, Pengcheng; Wu, Huibin

doi:10.1007/s11665-022-07388-x

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…Therefore, nonrecrystallized austenite transforms into small ferrite grains on the ROT. [15,20] The cooling rate after final rolling can retard the growth of grains. The increase in strengthening is associated with refinement of DOI: 10.1002/srin.202300478 Six hot compression tests are conducted using the Gleeble3500 thermomechanical simulator to investigate the microstructural evolution and precipitation behavior in low-C-Mn V-microalloyed steel.…”

Section: Introductionmentioning

confidence: 99%

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Thermomechanical Control of Microstructure and Precipitation in Vanadium Microalloyed Steel: Influence of Finish Rolling and Coiling Temperatures

Wu,

Yang,

Tang

et al. 2024

steel research int.

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Six hot compression tests are conducted using the Gleeble3500 thermomechanical simulator to investigate the microstructural evolution and precipitation behavior in low‐C–Mn V‐microalloyed steel. The specimens are subjected to hot isothermal compression deformation of 87%. The optical microscopy and transmission electron microscopy using carbon extraction replica method are used to characterize the microstructures and precipitation after the simulated thermomechanical controlled process and coiling. The results indicate that increasing the finish rolling temperature benefits the refinement of ferrite grains but has little influence on the refinement of the precipitates. It is also observed that lower coiling temperatures (CTs) promote the formation of fine precipitates. When the CT is 500 °C, the average precipitate size is found to be 86 nm. Furthermore, it is found that the CT significantly influences the nucleation sites of the precipitates inter alia, the matrix, interphase, grain boundaries, and dislocations. As expected, at higher CTs, nucleation is predominantly on the defects rather than the matrix.

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Section: Introductionmentioning

confidence: 99%

“…Therefore, nonrecrystallized austenite transforms into small ferrite grains on the ROT. [ 15,20 ] The cooling rate after final rolling can retard the growth of grains. The increase in strengthening is associated with refinement of grain size, increasing in dislocation density and precipitation strengthening contribution.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical Control of Microstructure and Precipitation in Vanadium Microalloyed Steel: Influence of Finish Rolling and Coiling Temperatures

Wu,

Yang,

Tang

et al. 2024

steel research int.

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A Study on the Corrosion Behavior of Ti-Containing Weathering Steel in a Simulated Marine Environment

Hu,

Wang,

et al. 2024

Metall Mater Trans A

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Effects of normalizing and tempering temperature on the bainite microstructure and properties of low alloy fire-resistant steel bars

Zheng,

Ren,

Zhang

et al. 2024

High Temperature Materials and Processes

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Different combinations of normalizing and tempering were carried out to optimize the microstructure and enhance the high-temperature mechanical properties of HRB400FR fire-resistant steel bars. The results showed that with the increasing of the tempering temperature from 400 to 600°C, the steel bar’s hardness decreases linearly, mainly due to the formation of quasi-polygon ferrite and granular bainite. Besides, the reduced width and the dissolution of the lath bainite also undermine the performance of the tempered steel bars. The highest Vickers hardness of 380 HV is achieved when the steel is normalized at 950°C and then tempered at 400°C, mainly due to precipitation strengthening and bainite strengthening. The hardness of the test steel tempered at 600°C gives the lowest value, only 230 HV since the least amount of bainite is obtained. When the tempering temperature reaches 650°C, the hardness rises to 260 HV due to the formation of the lath bainite. The emergence of needle bainite generally reduces the matrix grain size, and the appearance of lath martensite refines the precipitated carbides.

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Synergistic Effects of Ti and Mo on the Microstructure and Properties of Low-Cost Fire-Resistant and Weather-Resistant Construction Steel

Cited by 3 publications

References 46 publications

Thermomechanical Control of Microstructure and Precipitation in Vanadium Microalloyed Steel: Influence of Finish Rolling and Coiling Temperatures

Thermomechanical Control of Microstructure and Precipitation in Vanadium Microalloyed Steel: Influence of Finish Rolling and Coiling Temperatures

A Study on the Corrosion Behavior of Ti-Containing Weathering Steel in a Simulated Marine Environment

Effects of normalizing and tempering temperature on the bainite microstructure and properties of low alloy fire-resistant steel bars

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