Effect of processing parameters on scale formation during hot steel strip rolling

The influence of processing parameters (slab thickness, water flow of interstand cooling and oil flow in roll gap lubrication system) on the thickness and composition of the tertiary scale formed during hot strip rolling, was studied in a low carbon steel in factory. The scale formed on the rolled s...

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Bibliographic Details
Published in:Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2010-03, Vol.13 (1), p.11-14
Main Authors: Lima Júnior, Sergio de Oliveira, Bellon, Júlio Cezar, Souza Júnior, Paulo Antônio de, Araújo, Fernando Gabriel da Silva, Cota, André Barros
Format: Article
Language:English
Subjects:
ENGINEERING, CHEMICAL
hot-rolled strips
MATERIALS SCIENCE, MULTIDISCIPLINARY
METALLURGY & METALLURGICAL ENGINEERING
Mössbauer spectroscopy
tertiary scale
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Summary:The influence of processing parameters (slab thickness, water flow of interstand cooling and oil flow in roll gap lubrication system) on the thickness and composition of the tertiary scale formed during hot strip rolling, was studied in a low carbon steel in factory. The scale formed on the rolled surface was characterized by scanning electron microscopy and Mössbauer spectroscopy. It was observed that the combined effect of a greater rolling oil volume applied, larger bar thickness, and smaller amount of water flow during interstand cooling reduces the tertiary scale thickness. Besides, a smaller crack density in the samples is associated with greater rolling oil volume and smaller oxide scale thickness. The principal phase of the scale formed in hot-rolled steel strips is stoichiometric magnetite, without isomorphic substitutions.
ISSN:1516-1439
1980-5373
1516-1439
DOI:10.1590/S1516-14392010000100004