Mechanism of Microstructural Banding in Hot Rolled Microalloyed Steels

Abstract:

Pilot-scale plate rolling experiments and laboratory thermomechanical processing experiments were carried out to understand the mechanism of microstructural banding in low-carbon microalloyed steels. The microstructural banding originates with large elongated austenite grains, which are present at the roughing stage of rolling. The large austenite grains develop when conditions favour abnormal grain growth during reheat and/or strain induced grain boundary migration (SIBM) in the first few rolling passes. Microstructural banding is eliminated by designing TMP schedules to avoid abnormal grain growth and SIBM.

• Periodical: Materials Science Forum (Volumes 500-501)
• Pages: 171-178
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.500-501.171
• Online since: November 2005
• Authors: S. Cai, J.D. Boyd
• Keywords: Abnormal Grain Growth, Microstructural Banding, Strain Induced Grain Boundaries Migration, Thermomechanical Process

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