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Article

Complex Precipitates of TiN-MCx in GCr15 Bearing Steel

1
School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China
2
Key Laboratory of Chemical Metallurgy Engineering Liaoning Province, University of Science and Technology Liaoning, Anshan 114051, China
3
Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO 80401, USA
*
Author to whom correspondence should be addressed.
Metals 2019, 9(6), 641; https://doi.org/10.3390/met9060641
Received: 7 May 2019 / Revised: 23 May 2019 / Accepted: 31 May 2019 / Published: 3 June 2019
Nitride and carbide are the second phases which play an important role in the performance of bearing steel, and their precipitation behavior is complicated. In this study, TiN-MCxprecipitations in GCr15 bearing steels were obtained by non-aqueous electrolysis, and their precipitation mechanisms were studied. TiN is the effective heterogeneous nucleation site for Fe7C3 and Fe3C; therefore, MCxcan precipitate on the surface of TiN easily. The chemistry component of MCx consists of M3C and M7C3 (M = Fe, Cr, Mn) and Cr3C2. TiN-MCx with high TiN volume fraction, TiN forms in early stage of solidification, and MCx precipitates on TiN surface after TiN engulfed by the solidification advancing front. TiN-MCx with low TiN volume fraction, TiN and MCx form in late stage of solidification, TiN can not grow sufficiently and is covered by numerous precipitated MCxparticles. View Full-Text
Keywords: non-aqueous electrolysis; TiN-MCx; precipitation; bearings; high carbon chromium bearing steel non-aqueous electrolysis; TiN-MCx; precipitation; bearings; high carbon chromium bearing steel
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MDPI and ACS Style

Tian, Q.; Wang, G.; Yuan, X.; Wang, Q.; Sridhar, S. Complex Precipitates of TiN-MCx in GCr15 Bearing Steel. Metals 2019, 9, 641. https://doi.org/10.3390/met9060641

AMA Style

Tian Q, Wang G, Yuan X, Wang Q, Sridhar S. Complex Precipitates of TiN-MCx in GCr15 Bearing Steel. Metals. 2019; 9(6):641. https://doi.org/10.3390/met9060641

Chicago/Turabian Style

Tian, Qianren, Guocheng Wang, Xinghu Yuan, Qi Wang, and Seetharaman Sridhar. 2019. "Complex Precipitates of TiN-MCx in GCr15 Bearing Steel" Metals 9, no. 6: 641. https://doi.org/10.3390/met9060641

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