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Distortion Control of Transmission Components by Optimized High Pressure Gas Quenching

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Abstract

The paper presents how the “Dynamic Quenching” and “Reversing gas flow” processes are successfully applied on internal ring gears and planetary gears for a 6-speed automatic transmission. The specific challenge was to reduce distortion in such a way that subsequent machining operations are entirely eliminated. As a result of extensive development in the quenching process, it was possible to meet the design metrological requirements. The internal ring gears have been in continuous production since 2006. By utilizing the special CFC fixtures and quench methodology of “Dynamic Quenching,” the customer was able to achieve the design intent, while eliminating all machining operations of the ring gears following LPC/HPGQ. Subsequent testing and monitoring over a 2-year period progressively demonstrated that conformance. Therefore, quality inspection was reduced accordingly.

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Authors and Affiliations

  1. ALD, Hanau, Germany

    Volker Heuer & K. Loeser

  2. General Motors, Pontiac, MI, USA

    Donald R. Faron

  3. ALD Thermal treatment, Port Huron, MI, USA

    David Bolton & Mike Lifshits

Authors
  1. Volker Heuer
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  2. Donald R. Faron
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  3. David Bolton
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  4. Mike Lifshits
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  5. K. Loeser
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Corresponding author

Correspondence to Volker Heuer.

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, Ohio, and has been expanded from the original presentation.

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Heuer, V., Faron, D.R., Bolton, D. et al. Distortion Control of Transmission Components by Optimized High Pressure Gas Quenching. J. of Materi Eng and Perform 22, 1833–1838 (2013). https://doi.org/10.1007/s11665-013-0547-6

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  • DOI: https://doi.org/10.1007/s11665-013-0547-6

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