Scale Formation on 430 Stainless Steel in a Simulated Slab Combustion Reheat Furnace Atmosphere

Tuesday, 10 November 2020 • Noon – 1 p.m. EST

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SPEAKER

Richard Osei, Missouri University of Science and Technology

DESCRIPTION

Scale formed during slab reheating can be difficult to remove by high-pressure descaling, having a negative impact hot roll surface quality. A large-capacity thermogravimetric apparatus that replicates the combustion atmosphere and temperature in a slab reheat furnace was used to investigate scale formation on 430 stainless steel. Effects of reheating parameters (temperature, time and atmosphere) on oxidation kinetics were investigated. Oxidized samples were characterized by scanning electron microscopy, Raman spectroscopy and x-ray diffraction to document the microstructure and morphology of scale. Mechanisms for the formation of multi-layered oxide structures that complicate oxidation kinetics and scale removal are discussed.

MODERATOR

Simon Lekakh, Missouri University of Science and Technology

ORGANIZED BY

AIST’s Hot Sheet Rolling Technology Committee.