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FEATURE
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Fig. 3 —
ORNL industrial prototype magnetic processing equipment
includes 8-in. diam. vertical warm-bore superconducting magnet
system and Ajax Tocco Magnethermic 200-kW dual-frequency
induction heating systemwith 75-gpmpolymer-water quench.
Fig. 4 —
Improvement in single-tooth bending fatigue life of ITMP
gears over baseline properties.
Fig. 5 —
Microstructure of ITMP (top) and baseline gear (bottom).
ITMP gear has a refinedmartensitic structure and fine carbides.
Grain boundary in baseline gear indicated by red arrow.
Acknowledgment
This report is based on research supported by the
U.S. DOE under Award No. DE-FG36-08GO18131 with Eaton
Corp. as the primary lead, using the Thermomagnetic
Processing Facilities at ORNL, supported by the Office of
Energy Efficiency and Renewable Energy.
This manuscript has been authored by UT-Battelle
LLC under Contract No. DE-AC05-00OR22725 with the
DOE. The U.S. Government retains and the publisher, by
accepting the article for publication, acknowledges that
the Government retains a non-exclusive, paid-up, irre-
vocable, worldwide license to publish or reproduce the
published form of this manuscript, or allow others to do
so, for Government purposes. The DOE will provide public
access to these results of federally sponsored research in
accordance with the DOE Public Access Plan (
energy.gov/ downloads/doe-public-access-plan).
References
1. G. Ludtka, et al., Exploring Ultrahigh Magnetic Field
Processing of Materials for Developing Customized
Microstructures and Enhanced Performance, ORNL Tech.
memo, ORNL/TM-2005/79, Mar., 2005,
www1.eere.energy. gov/manufacturing/industries_technologies/imf/pdfs/ 1792magneticprocessingfinal.pdf.2. G. Ludtka, et al., Magnetic Field Processing – A
Heat Free Heat Treating Method, ORNL Tech. memo,
ORNL/TM-2012/78, Aug. 2012,
www.osti.gov/servlets/ purl/1049805/.
3. M. Lusk, et al., Effect of Austenitization Hold Time and
Temperature on Matrix Carbon Content and Martensite
Kinetics in 52100, unpublished research, Colorado School
of Mines.
For more information:
Aquil Ahmad is retired from Eaton
Corp., Cleveland. He can be reached at
ahmadaquil@sbc- global.net.
•
From a sustainability perspective, an 85% reduction
in energy use is estimated when using ITMP versus
conventional processing for the gears.
•
As presented in Fig. 1, low cost steels can rival exotic
costly alloys in properties and performance when
using ITMP.