ISSN 2594-5297
52º Seminário de Laminação — vol. 52, num.52 (2015)
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Resumo
More and more Hot Strip Mills are facing defects on their products that lead to a rejection of complete product batches by their customers. Several of those defects are induced by excessive work roll degradation. This paper is focussed on the understanding of work roll corrosion and oxidation mechanisms in a hot strip mill. Several laboratory trials (Hot rolling simulator, cyclic oxidation) have highlighted important factors influencing corrosion of work rolls as well as helping the understandings of oxidation of a work roll in the roll bite and along the roll circumference in a stand. The attention is focussed on several elements present in water used in HSM for direct roll cooling (e.g. chloride, bactericides, sulphates, phosphates…) and their effect on roll surface degradation. The second part of this paper is focused on the understanding of work roll oxidation along the roll circumference. The effects of roll composition, roll temperature, water composition and water temperature have been studied in order to understand the oxidation/corrosion mechanisms in a HSM.
Palavras-chave
Work roll, Degradation, Cooling water, Corrosion, Oxidation, Hot rolling
Hot rolling
Como citar
Flament, Sebastien;
Walmag, Gisele;
Sinnaeve, Mario.
UNDERSTANDING OF WORK ROLL CORROSION AND OXIDATION IN A HOT STRIP MILL
,
p. 379-388.
In: 52º Seminário de Laminação,
Rio de Janeiro,
2015.
ISSN: 2594-5297
, DOI 10.5151/1983-4764-26811
