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| Elimination of Ridge Defect of Cold Rolled Strip Coil |
| LI Junhong1,LI Jun1,LI Weiping2 |
| 1. Panzhihua Iron and Steel Research Institute, Panzhihua 617000, Sichuan, China; 2. Hot Rolling Mill of PZH Steel, Panzhihua 617062, Sichuan, China |
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Abstract The problem of ridge defect occurred in cold rolled strip coiling was studied. Based on the experiment of uncoiling and recoiling and strip profile measurement, the ridge defect of coil was analyzed. By the means of optimization of rolling schedule, control of work roll thermal crown, optimization of work roll profile on finishing train and uniform cooling and lubrication of work rolls, the local thickening of hot rolled strip which causes the ridge defect was eliminated efficiently. The rate of ridge defect was decreased from 6.65% to 0.33%.
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Received: 01 January 1900
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2008, Vol. 43 
