Abstract
Quenching and partitioning (Q&P) or quenching and tempering (Q&T) process of modified ultrahigh carbon steel (UHCS, Fe–1.69C–1.38Si–1.84Mn–2.20Cr–0.54Mo–0.43Ni wt%) was investigated by means of scanning electronic microscopy (SEM) equipped with energy-dispersive spectrometry (EDS) and x-ray diffraction (XRD). Mechanical properties, including hardness and impact toughness, and wear resistance were also measured. After Q&P, high impact toughness (10.5 J/cm2) and wear resistance at 100 N load in dry sliding were achieved on tested samples. We attributed the optimum mechanical properties and high wear resistance to better microstructure consisting of carbon-depleted martensite, uniformly distributed fine carbides, and high volume fraction of retained austenite.
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Acknowledgments
The authors gratefully thank associate Professor G.M. Cai, School of Materials Science and Engineering, Central South University, Changsha, Hunan, P.R. China, for her helpful discussions about calculation of volume fraction from XRD pattern.
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Luo, Y.H., Liu, H.S., **, Z.P. et al. Quenching and Partitioning of Ultrahigh Carbon (1.69 Mass% C) Steel. Metallogr. Microstruct. Anal. 5, 124–134 (2016). https://doi.org/10.1007/s13632-016-0270-4
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DOI: https://doi.org/10.1007/s13632-016-0270-4