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  • 12/13/2022 1:00 PM CST
  • 12/13/2022 2:00 PM CST
Recent research  has shown that grain refinement can also be accomplished through intercritical (IC) heat treatment. In those studies, a fine-grained mixture of acicular martensite, or acicular pearlite, in ferrite can be produced by heating to and cooling from a temperature just below the upper critical temperature, as shown in Figures 4a and 4b. Laboratory heat treatment experiments demonstrated that a combination of high strength and high tensile elongation could be achieved by this technique. Zinardi9 reported similar microstructures and mechanical properties for an “IDI” (isothermal ductile iron) alloy using a proprietary heat treatment method.

Speakers: Rick Gundlach

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