Abstract
In order to increase market competition, high quality of strip production was demanded. So the quality control of strip was strictly and more active by all the major steelmakers. Today, the device objects of flatness control had extended from tandem mill to subsequent continuous annealing line (CAPL), continuous galvanizing line (CGL), color coating line (CCL) and finishing processing lines, and the types of strip defects researches also have extended from continuous longitudinal waves along lengthwise to warping and composite flatness defect of warping and buckling. In this paper, the simulation model of tension leveling has been established. The effect of bending roll, leveling roll intermesh and strip tension to the distribution of elongation in thickness for strip have been given. Base on this, the analysis model of warping defect of on-line and off-line strip have been built by ABAQUS. On the basis of analyzed the mechanism, proposed measures to reduce the value of cross bow. These measures have been applied in production; the effect of application was obvious.
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