Deformation Of Oxide Scale And Roll-strip Interface Characteristics In Hot Rolling Of Stainless Steel 304

Publisher:
Wiley-v C H Verlag Gmbh
Publication Type:
Journal Article
Citation:
Steel Research International, 2010, 81 (9), pp. 102 - 105
Issue Date:
2010-01
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The deformation of oxide scale affects roll-strip interface characteristics in hot rolling. Few studies have been carried out on the deformation behavior of oxide scale in hot rolling of stainless steels. In this paper, the thickness, morphology of the oxide scale and the surface roughness of workpiece in hot rolling of stainless steel 304 under the condition of a single pass were investigated, and the friction coefficients were calculated. The effect of humidity on the growth of oxide scale of stainless steel 304 has been identified. Outer and inner oxide layers can be found when the water vapor content is over 7 vol.%. An incomplete oxide layer which is a transition layer between the inner oxide layer and steel substrate can be distinguished in thick oxide scale when the water vapour content is over 12 vol.%. The oxide scale thickness decreases linearly with an increase of reduction. Surface roughness also decreases with an increase of reduction. After experiencing 20 and 30 % reduction, the surface roughness asperities are flattened, so the outmost surface of oxide scale after rolling is much smoother than that before rolling. Generally, friction coefficients decrease with an increase of reduction.
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