Hot Rolling of Medium-Mn Steel
(Room 202A)
08 May 17
11:00 AM
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11:30 AM
Tracks:
New Developments & Detailed Microstructural Characterization of AHSS
The medium-Mn content steels represent a truly new class of ferrous alloys with a wide-ranging industrial application potential. Medium-Mn steels have an extreme hardenability, which prevents the development of thermodynamically stable microstructures. In the case of hot rolled medium-Mn steel, a recrystallized fully austenitic microstructure develops directly after the finisher. Independent of the coiling temperature or the cooling rate, the final room-temperature microstructure is invariably martensitic. Further processing requires an intermediate annealing step to soften the steel enough to enable cold rolling. The steel must be given an intermediate annealing to obtain the required properties for further processing or for use in applications. This presentation will present microstructure control methods to address this issue.