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Method for Accurate Surface Temperature Measurements During Fast Induction Heating

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Abstract

A robust method is proposed for the measurement of surface temperature fields during induction heating. It is based on the original coupling of temperature-indicating lacquers and a high-speed camera system. Image analysis tools have been implemented to automatically extract the temporal evolution of isotherms. This method was applied to the fast induction treatment of a 4340 steel spur gear, allowing the full history of surface isotherms to be accurately documented for a sequential heating, i.e., a medium frequency preheating followed by a high frequency final heating. Three isotherms, i.e., 704, 816, and 927°C, were acquired every 0.3 ms with a spatial resolution of 0.04 mm per pixel. The information provided by the method is described and discussed. Finally, the transformation temperature Ac1 is linked to the temperature on specific locations of the gear tooth.

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Authors and Affiliations

  1. Mechanical Engineering Department, École de Technologie Supérieure, Montreal, QC, Canada

    Benjamin Larregain, Nicolas Vanderesse, Florent Bridier & Philippe Bocher

  2. Pratt & Whitney Canada, Longueuil, QC, Canada

    Patrick Arkinson

Authors
  1. Benjamin Larregain
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  2. Nicolas Vanderesse
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  3. Florent Bridier
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  4. Philippe Bocher
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  5. Patrick Arkinson
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Corresponding author

Correspondence to Benjamin Larregain.

Additional information

This article is an invited paper selected from presentations at the 26th ASM Heat Treating Society Conference, held October 31 through November 2, 2011, in Cincinnati, OH, and has been expanded from the original presentation.

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Larregain, B., Vanderesse, N., Bridier, F. et al. Method for Accurate Surface Temperature Measurements During Fast Induction Heating. J. of Materi Eng and Perform 22, 1907–1913 (2013). https://doi.org/10.1007/s11665-013-0527-x

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  • DOI: https://doi.org/10.1007/s11665-013-0527-x

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