Effect of Cooling Rate on Carbide Banding in High-Chromium Bearing Steel After Spheroidization

Hong Yi Wu; Yen Hao Frank Su; Guan Ru Lin; Jui Chao Kuo

doi:10.1007/s11661-020-05870-6

Effect of Cooling Rate on Carbide Banding in High-Chromium Bearing Steel After Spheroidization

Hong Yi Wu, Yen Hao Frank Su, Guan Ru Lin, Jui Chao Kuo

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

This study investigated the effect of cooling rate on the formation of carbide bands in hot-rolled SUJ2 steel after spheroidization. The metallographic microstructure was observed under an optical microscope and a scanning electron microscope with an electron backscatter diffractometer, and the distribution of the chemical composition was analyzed using a field emission electron probe. Experimental results show the formation of carbide banding and the effect of cooling rate. Cr segregation occurs in carbide banding, in which C content increases after austenitization and spheroidization. The area fraction of carbide in the band region is larger than that in the normal region. Increasing the cooling rate can restrain the diffusion of C into the Cr microsegregation band. The formation of carbide banding can be avoided at a high cooling rate. This phenomenon may aid in quantifying the processing parameter of the cooling rate to improve the quality and the lifetime of bearings for bearing steels.

Original language	English
Pages (from-to)	4471-4482
Number of pages	12
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	51
Issue number	9
DOIs	https://doi.org/10.1007/s11661-020-05870-6
Publication status	Published - 2020 Sept 1

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys

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10.1007/s11661-020-05870-6

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title = "Effect of Cooling Rate on Carbide Banding in High-Chromium Bearing Steel After Spheroidization",

abstract = "This study investigated the effect of cooling rate on the formation of carbide bands in hot-rolled SUJ2 steel after spheroidization. The metallographic microstructure was observed under an optical microscope and a scanning electron microscope with an electron backscatter diffractometer, and the distribution of the chemical composition was analyzed using a field emission electron probe. Experimental results show the formation of carbide banding and the effect of cooling rate. Cr segregation occurs in carbide banding, in which C content increases after austenitization and spheroidization. The area fraction of carbide in the band region is larger than that in the normal region. Increasing the cooling rate can restrain the diffusion of C into the Cr microsegregation band. The formation of carbide banding can be avoided at a high cooling rate. This phenomenon may aid in quantifying the processing parameter of the cooling rate to improve the quality and the lifetime of bearings for bearing steels.",

author = "Wu, {Hong Yi} and Su, {Yen Hao Frank} and Lin, {Guan Ru} and Kuo, {Jui Chao}",

note = "Funding Information: The authors would gratefully like to thank the Ministry of Science and Technology for supporting the Fund in the Project under MOST 107-2221-E-006-018 and the Instrument Center of NCKU to provide Hitachi SU5000 FE-SEM. Funding Information: The authors would gratefully like to thank the Ministry of Science and Technology for supporting the Fund in the Project under MOST 107-2221-E-006-018 and the Instrument Center of NCKU to provide Hitachi SU5000 FE-SEM. Publisher Copyright: {\textcopyright} 2020, The Minerals, Metals & Materials Society and ASM International.",

year = "2020",

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doi = "10.1007/s11661-020-05870-6",

language = "English",

volume = "51",

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journal = "Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science",

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AU - Wu, Hong Yi

AU - Su, Yen Hao Frank

AU - Lin, Guan Ru

AU - Kuo, Jui Chao

N1 - Funding Information: The authors would gratefully like to thank the Ministry of Science and Technology for supporting the Fund in the Project under MOST 107-2221-E-006-018 and the Instrument Center of NCKU to provide Hitachi SU5000 FE-SEM. Funding Information: The authors would gratefully like to thank the Ministry of Science and Technology for supporting the Fund in the Project under MOST 107-2221-E-006-018 and the Instrument Center of NCKU to provide Hitachi SU5000 FE-SEM. Publisher Copyright: © 2020, The Minerals, Metals & Materials Society and ASM International.

PY - 2020/9/1

Y1 - 2020/9/1

N2 - This study investigated the effect of cooling rate on the formation of carbide bands in hot-rolled SUJ2 steel after spheroidization. The metallographic microstructure was observed under an optical microscope and a scanning electron microscope with an electron backscatter diffractometer, and the distribution of the chemical composition was analyzed using a field emission electron probe. Experimental results show the formation of carbide banding and the effect of cooling rate. Cr segregation occurs in carbide banding, in which C content increases after austenitization and spheroidization. The area fraction of carbide in the band region is larger than that in the normal region. Increasing the cooling rate can restrain the diffusion of C into the Cr microsegregation band. The formation of carbide banding can be avoided at a high cooling rate. This phenomenon may aid in quantifying the processing parameter of the cooling rate to improve the quality and the lifetime of bearings for bearing steels.

AB - This study investigated the effect of cooling rate on the formation of carbide bands in hot-rolled SUJ2 steel after spheroidization. The metallographic microstructure was observed under an optical microscope and a scanning electron microscope with an electron backscatter diffractometer, and the distribution of the chemical composition was analyzed using a field emission electron probe. Experimental results show the formation of carbide banding and the effect of cooling rate. Cr segregation occurs in carbide banding, in which C content increases after austenitization and spheroidization. The area fraction of carbide in the band region is larger than that in the normal region. Increasing the cooling rate can restrain the diffusion of C into the Cr microsegregation band. The formation of carbide banding can be avoided at a high cooling rate. This phenomenon may aid in quantifying the processing parameter of the cooling rate to improve the quality and the lifetime of bearings for bearing steels.

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Effect of Cooling Rate on Carbide Banding in High-Chromium Bearing Steel After Spheroidization

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