Study on the effects of Al–Ce composite deoxidations on the modification behaviors of TiN inclusions in 20CrMnTi steel

Shuang Liu; Fan Yang; Lixia Liu; Jian Wang; Jun Peng; Fang Zhang; Shengli An

Journal of Materials Research and Technology (Mar 2024)

Study on the effects of Al–Ce composite deoxidations on the modification behaviors of TiN inclusions in 20CrMnTi steel

Shuang Liu,
Fan Yang,
Lixia Liu,
Jian Wang,
Jun Peng,
Fang Zhang,
Shengli An

Affiliations

Shuang Liu: School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Inner Mongolia University of Science and Technology, Ministry of Education, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China
Fan Yang: School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Inner Mongolia University of Science and Technology, Ministry of Education, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China
Lixia Liu: School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Inner Mongolia University of Science and Technology, Ministry of Education, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China
Jian Wang: Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China
Jun Peng: School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Inner Mongolia University of Science and Technology, Ministry of Education, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Corresponding author. School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China..
Fang Zhang: School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Corresponding author. School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou 014010, China.
Shengli An: School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Inner Mongolia University of Science and Technology, Ministry of Education, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China

Journal volume & issue: Vol. 29
pp. 4863 – 4869

Abstract

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20CrMnTi gear steel has high low-temperature impact toughness and is widely used in the manufacturing of engineering machinery such as automotive transmission gears. The sizes and distributions of TiN inclusions have a significant impact on the service performances of 20CrMnTi gear steel. Controlling the growth behaviors and size distributions of TiN inclusions are the foundation for stable, high-quality, and efficient production of 20CrMnTi gear steel. This paper uses experimental and computational methods to study the effects of different ratios of Al–Ce composite deoxidizers on the modification behaviors of TiN inclusions in 20CrMnTi steel. The results show that the TiN inclusions in 20CrMnTi steel without Al–Ce composite deoxidizer are square in shape, with a size of approximately 4 μm. After Al–Ce composite deoxidation, a composite phase inclusion is formed in the steel, which has contracted edges and corners. The center is the nucleation core composed of elements such as Ce, Al, O, etc. The elements of Ti and N are wrapped around the periphery of the composite inclusion, reducing its size to 2 μm. When the ratio of Al and Ce in the Al–Ce composite deoxidizer is 7:3, the number of TiN inclusions in steel is the highest, accounting for 51.7% of the total amount of titanium inclusions. The average diameter of inclusions in the modified steel decreases to 2.4 μm. When the ratio of Al and Ce elements is 8:2 and 7:3, the final deoxygenation product is CeAlO3, which is more conducive to the modification of TiN inclusions in 20CrMnTi steel.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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