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Wear resistance enhancement in cryotreated En 52 and 21-4N valve steels

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Abstract

This experimental study investigates the wear resistance improvement in En 52 and 21-4N valve steels through shallow and deep cryogenic treatment using a reciprocatory friction and wear monitor as per the ASTM standard G-133. It has been observed that the wear resistance of En 52 and 21-4N has improved by 81.15% & 13.49% respectively, due to shallow cryogenic treatment, 86.54% & 22.08% respectively, due to deep cryogenic treatment, when compared to the conventional heat treatment. The microstructural study suggests that the improvement in wear resistance and hardness is attributed to the conversion of retained austenite into martensite, along with precipitation and distribution of the carbides brought in by the cryogenic treatment.

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Abbreviations

ASTM:

American standard for testing and materials

CHT:

Conventional heat treatment

DCT:

Deep cryogenic treatment

SCT:

Shallow cryogenic treatment

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Authors and Affiliations

  1. Department of Mechanical Engineering, College of Engineering Guindy, Anna University Chennai, Chennai, Tamil Nadu, India, 600-025

    Maria Arockia Jaswin & Dhasan Mohan Lal

  2. Rane Engine Valves Ltd., P.B. No. 1305, Chennai, Tamil Nadu, India, 600-016

    Gobi Subbarathinam Shankar

Authors
  1. Maria Arockia Jaswin
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  2. Gobi Subbarathinam Shankar
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  3. Dhasan Mohan Lal
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Correspondence to Dhasan Mohan Lal.

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Jaswin, M.A., Shankar, G.S. & Lal, D.M. Wear resistance enhancement in cryotreated En 52 and 21-4N valve steels. Int. J. Precis. Eng. Manuf. 11, 97–105 (2010). https://doi.org/10.1007/s12541-010-0012-5

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  • DOI: https://doi.org/10.1007/s12541-010-0012-5

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