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A Study of Austempered Ductile Cast Iron

  • J. D. Verhoeven (a1), A. El Nagar (a2), B. El Sarnagawa (a2), D. P. Cornwell (a1) and F. Laabs (a1)...

Abstract

Experiments were carried out on unalloyed ductile cast iron to evaluate the % retained austenite (%RY) and its lattice parameter as a function of austenitizing time and temperature for austempering temperatures ranging from 270 to 420°C. Results are related to expected carbon levels in the gamma iron matrix at the austenitizing temperature. It is shown that the rate of austenitization can be described as a two step process and experiments demonstrate that 900°C austenitizatlon is complete after 8m. An 1100°C homogenizatdon has been shown to have a small effect upon %RY and rate of austenitization.

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A Study of Austempered Ductile Cast Iron

  • J. D. Verhoeven (a1), A. El Nagar (a2), B. El Sarnagawa (a2), D. P. Cornwell (a1) and F. Laabs (a1)...

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