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Evaluation of effective case depth in heat treated steel products using photothermal radiometry

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Abstract.

A quantitative calibrated methodology based on photothermal radiometric (PTR) depth-profilometry for non-contact, non-intrusive determination of effective case depth in heat treated case-hardened steel products was developed. Several types of heat-treated C1018 industrial steel screw products (with hexa- gonal, cylindrical and spherical heads) were statistically evaluated using the case-depth – induced interferometric thermal-wave phase minima. Calibration curves for each type of sample were established with the help of conventional destructive indenter measurements. It is shown that PTR thermal-wave interferometric phase minima can be used as a fast, on-line inspection methodology of industrial steel products for non-destructive quality control of heat treating processes.

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Authors and Affiliations

  1. Institute of Modern Optical Technologies, Suzhou University, Suzhou, Jiangsu, 215006, P.R. China

    C. Wang

  2. Key Lab of Modern Optical Technologies of Jiangsu Province, Suzhou, Jiangsu, 215006, P.R. China

    C. Wang

  3. Center for Advanced Diffusion-Wave Technologies, Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, M5S 3G8, Canada

    A. Mandelis

Authors
  1. C. Wang
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  2. A. Mandelis
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Wang, C., Mandelis, A. Evaluation of effective case depth in heat treated steel products using photothermal radiometry. Eur. Phys. J. Spec. Top. 153, 373–376 (2008). https://doi.org/10.1140/epjst/e2008-00465-9

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  • DOI: https://doi.org/10.1140/epjst/e2008-00465-9

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