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The Microstructure and Abrasive Wear Resistance of Fe–Cr–C Hardfacing Alloys with the Composition of Hypoeutectic, Eutectic, and Hypereutectic at \( \frac{Cr}{C} = 6 \)

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Abstract

In this investigation, three Fe–Cr–C hardfacing alloys with different carbon and chromium contents and in constant ratio of \( \left( {\frac{Cr}{C} = 6} \right) \) were fabricated by GTAW on AISI 1010 mild steel substrates. The OES, OM, SEM, and XRD techniques and Vickers hardness method were used for determining chemical composition, hardness, and studying the microstructure of the hardface alloys. The OES, OM, and XRD examination results indicated that different carbon and chromium contents of hardface alloys produced hypoeutectic/eutectic/hypereutectic structures. By increasing the carbon and chromium contents in the chemical composition of hardface alloys, the volume fraction of the total (Cr, Fe)7C3 is increased resulting to decreasing in total the austenite volume fraction and increasing the hardness of the surface. Studying the microstructure after wear test (ASTM G65) shows that at the edge of the worn surface, the transformation of austenite to martensite had occurred in all the samples. The wear test results indicate that the highest wear resistance is gained in the hypoeutectic structure with maximum hardness after the wear test. In addition, abrasive wear micromechanisms in hypoeutectic/eutectic/hypereutectic were recognized as: ploughing + cutting/ploughing + cutting + cracking/cracking + cutting, respectively.

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Authors and Affiliations

  1. Department of Materials Engineering, Science and Research Branch, Islamic Azad University (IAU), Tehran, Iran

    H. Sabet

  2. School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran

    Sh. Khierandish, Sh. Mirdamadi & M. Goodarzi

  3. Center of Excellence for Advanced Materials, Iran University of Science and Technology, Tehran, Iran

    Sh. Khierandish & Sh. Mirdamadi

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  1. H. Sabet
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Sabet, H., Khierandish, S., Mirdamadi, S. et al. The Microstructure and Abrasive Wear Resistance of Fe–Cr–C Hardfacing Alloys with the Composition of Hypoeutectic, Eutectic, and Hypereutectic at \( \frac{Cr}{C} = 6 \) . Tribol Lett 44, 237 (2011). https://doi.org/10.1007/s11249-011-9842-2

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  • DOI: https://doi.org/10.1007/s11249-011-9842-2

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