Paper Title:

Microstructural Evolution of Ultrafine Ferrite during Plate Steel Processing Using Intermediate Cooling

Periodical Materials Science Forum (Volumes 706 - 709)
Main Theme THERMEC 2011
Edited by T. Chandra, M. Ionescu and D. Mantovani
Pages 83-88
DOI 10.4028/www.scientific.net/MSF.706-709.83
Citation D.J. Hamre et al., 2012, Materials Science Forum, 706-709, 83
Online since January, 2012
Authors D.J. Hamre, David K. Matlock, John G. Speer
Keywords Gleeble Simulation, Thermomechanical Processing (TMP), Ultra Fine Ferrite
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Abstract

A 0.12 wt.% C – 1.26 wt.% Mn steel was studied to evaluate phase transformations that occurred during a specific thermal processing method designed to simulate steel plate surface layer microstructural evolution during processing with intermediate cooling. All process simulations used a Gleeble thermomechanical simulator along with thermal practices developed previously. After intermediate cooling was completed during processing, slight reheating of the plate surface layer region would occur due to heat retained in the plate core. Microstructural evaluation of Gleeble samples quenched at several points along the thermal profile allowed interpretation of microstructural evolution during processing. The microstructure that was present at the point where deformation would be applied consisted of approximately 75% ferrite, 25% austenite and some small, undissolved cementite particles.