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Comparison of Microstructure and Surface Properties of AISI 1045 Steel After Quenching in Hot Alkaline Salt Bath and Oil

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Abstract

The effect of quenching in molten alkaline salt bath medium on the microstructure and surface properties of AISI 1045 steel in comparison with oil was investigated. Salt bath medium used in this research contained 40% NaOH and 60% KOH with addition of 5 wt.% water at 205 °C. Hardening of 1045 steel in this medium resulted in an almost uniform microstructure, which consisted of fine martensite and bainite. In comparison, the microstructure of oil quenched sample was martensite, ferrite, widmanestatten ferrite, and pearlite. Quenching in salt bath lead to improved surface properties, i.e., decrease in surface roughness and a good bearing area curve.

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Authors and Affiliations

  1. School of Metallurgy and Materials Engineering, Faculty of Engineering, University of Tehran, P. O. Box 11365-4563, Tehran, Iran

    S. Raygan, J. Rassizadehghani & M. Askari

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  1. S. Raygan
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  2. J. Rassizadehghani
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  3. M. Askari
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Correspondence to S. Raygan.

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Raygan, S., Rassizadehghani, J. & Askari, M. Comparison of Microstructure and Surface Properties of AISI 1045 Steel After Quenching in Hot Alkaline Salt Bath and Oil. J. of Materi Eng and Perform 18, 168–173 (2009). https://doi.org/10.1007/s11665-008-9273-x

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  • DOI: https://doi.org/10.1007/s11665-008-9273-x

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