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Laminage à froid des aciers : analyse des mécanismes de lubrification et de leurs impacts sur l'usure et le frottement

Abstract : To improve productivity and quality of Myriad coil coating steel, the cold rolling process (Sendzimir ZR 22-B) has to follow this progress by limiting the production of ferrous residues or by decreasing rolling problems. To achieve these goals the mechanisms of the strip-work roll contact, which is not directly controlled, has to be fully understood. That’s why, a new experimental methodology, based on the Upsetting Rolling Test and on the cold rolling process FEM, enables to simulate the industrial contact conditions (mechanical characteristics, contact temperature and lubrication regime). Thus, the impact of rolling conditions and lubrication physico-chemical mechanisms on friction and wear phenomena could have been studied. Important influences of contact temperature, rolling pass, lubricant used, presence or absence of limit additives (polar, anti-wear or extreme-pressure) were pointed out. Moreover, a transfer layer, which is the consequence of adhesive wear favoured by severe conditions (high temperature, absence of limit additives ...) was identified on roll. Its presence involves an increase of friction and production of abraded ferrous residues.
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https://hal-uphf.archives-ouvertes.fr/tel-03015705
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Submitted on : Friday, November 20, 2020 - 8:27:41 AM
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Kevin Louaisil. Laminage à froid des aciers : analyse des mécanismes de lubrification et de leurs impacts sur l'usure et le frottement. Génie mécanique [physics.class-ph]. Université de Valenciennes et du Hainaut-Cambrésis, 2008. Français. ⟨NNT : 2008VALE0047⟩. ⟨tel-03015705⟩

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