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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