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Título

BRIEF CHARACTERIZATION OF THE CHROMIUM COATING AND COMPARISON OF WETTABILITY OF SKIN PASS SOLUTION ON SURFACES OF ROLLS COATED AND NONCOATED

Autoria

Bagger, Karl K; Bertelli, Felipe

DOI

10.5151/9785-9785-32206

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Resumo

 

The competitive scenario of steel industry requires studies and developments to improve manufacturing processes focusing on increasing productivity and reducing costs. The practice of coating rolls for cold rolling with the chrome aims to increase the rolling campaign, reducing their wear by increasing the surface hardness, which guarantees a greater homogeneity in the surface of the rolled products. The present paper presents a study on the effect of the chromium coat on a forged steel rolls on the wettability of a SkinPass solution. The hardness of the coated layer and the contact angle were measured for two concentrations of solution on two types of surfaces, comparing the coated and uncoated surfaces. The results show that there is an influence of the coating on the wettability of the fluid when comparison are made with chrome coated and uncoated materials, being verified through tests in Goniometer. The productivity of the coated rolls showed higher productivity than the uncoated ones

Palavras-chave

Rolling steel; Roughness of rolls; cold rolling; rolls; coated surface;