Effect of externally added TiO<sub>2</sub> particles on microstructure and inclusions of medium and low carbon steel

Wu Xiaoyan; Li Qiuping; Mo Wenling; Zhang Qingjun; Zhu Liguang

doi:10.7513/j.issn.1004-7638.2021.01.018

Volume 42 Issue 1

Feb. 2021

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Wu Xiaoyan, Li Qiuping, Mo Wenling, Zhang Qingjun, Zhu Liguang. Effect of externally added TiO2 particles on microstructure and inclusions of medium and low carbon steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 113-118. doi: 10.7513/j.issn.1004-7638.2021.01.018

Citation:

Wu Xiaoyan, Li Qiuping, Mo Wenling, Zhang Qingjun, Zhu Liguang. Effect of externally added TiO₂ particles on microstructure and inclusions of medium and low carbon steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 113-118. doi: 10.7513/j.issn.1004-7638.2021.01.018

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Effect of externally added TiO₂ particles on microstructure and inclusions of medium and low carbon steel

doi: 10.7513/j.issn.1004-7638.2021.01.018

1.
College of Metallurgy and Energy, North China University of Science and Technology, Hebei High Quality Steel Continuous Casting Engineering Technology Research Center, Tangshan 063210, Hebei, China
2.
College of Yisheng, North China University of Science and Technology, Tangshan 063210, Hebei, China
3.
College of Material, Hebei University of Science and Technology, Shijiazhuang 050000, Hebei, China

Received Date: 2020-10-13
Publish Date: 2021-02-10

Abstract

Abstract

TiO₂ particles was added into the medium and low carbon liquid steel remelted by aHLLG1217 type high temperature resistance furnace. The microstructure, inclusion morphology and composition analysis had been investigated by an automatic metallurgical microscope, field emission S-4800 scanning electron microscope and other equipment. The results show that after adding TiO₂ particles, the microstructure changes from a large amount of massive ferrite and pearlite to a large amount of acicular ferrite, a small amount of massive ferrite and pearlite. Besides, more spherical inclusions appears and amount of elongated and irregular inclusions decreases. The average size of inclusions changes from 0.29 μm to 3.06 μm, and the proportion of inclusion with around 1 μm size increases to 28.69%. Main components of composite inclusions before and after addition are O-Al-Si-Ti-Mn, and the content of Ti element increases from 3.36% to 6.53%, which fully indicates that the TiO₂ particles re-polymerizewith the original inclusions to form composite inclusions after adding, and induce acicular ferrite nucleation and precipitation.
- medium and low carbon steel,
- TiO₂ particles,
- IGF,
- microstructure,
- inclusions

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References(8)

References

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