Investigation into methods of achieving greater reductions of width in the production of hot strip
As continuously cast material is being used increasingly for the production of hot strip, higher width reductions in the roughing stands become necessary. The method of corner cutting or corner edging of the slab ingot ends does not seem to be suitable for introduction into practical operation because the advantage that can be obtained will not justify the expenditure required. Relatively favourable results are obtained for the process of edging with simultaneous horizontal rolling passes both in simulation tests and practical operation. The method of width control by modifying the vertical pass reduction across the slab length proves extremely efficient and yielded excellent results in practical operation, especially with regard to the reduction of width variations. If the control curve is calculated correctly and the initial width of the slab ingots to be edged is known, the end constrictions can be prevented and local width oversizes reduced to acceptable limits. Since there are often considerable deviations between the nominal and actual widths of continuously cast slab ingots, measuring the slab ingot width proves indispensable. This method involves exacting demands on the dynamics of adjustment and the detection of stock position in the mill stand.
Bibliographic Reference: EUR 12015 DE (1988) MF, 139 pp., ECU 8, blow-up copy ECU 17.50
Record Number: 198910565 / Last updated on: 1994-12-01
Original language: de
Available languages: de