Metal deforming – By use of roller or roller-like tool-element – With modification or control of temperature of work – tool or...
Patent
1998-01-29
2000-05-16
Butler, Rodney A.
Metal deforming
By use of roller or roller-like tool-element
With modification or control of temperature of work, tool or...
72200, 72202, B21B 2706
Patent
active
060620552
ABSTRACT:
Rolling method for thin flat products, used in the production of flat rolled products with a final thickness in the range of 0.6-1.5 mm or more, up to 2.0-3.0 mm, in a plant suitable to work thicknesses of up to 25.4 mm, the method being applied to slabs with a thickness of between 50 and 90 mm if arriving directly from the continuous casting machine or on slabs with a greater thickness, of between 80 and 200-250 mm, if fed from a furnace to accumulate and heat the slabs (22), the method comprising at least a first heat treatment, a roughing or pre-finishing pass, a temperature equalisation treatment and a finishing pass in a finishing train (19) comprising at least three reduction passes, the finishing pass being followed by a step of cooling and coiling the flat finished product, the product at the outlet of the roughing or pre-finishing pass being in the austenitic state .gamma., the finishing pass taking place in the rolling line (10) at least partly in the ferritic step or in the austenitic step, as desired. Rolling line adopting the method as above, wherein the finishing train (19) cooperates with a system (24) to condition and adjust the temperature of the slab.
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Schoenbech, J. et al, "Stand Der ISP-Technologies Und Neue Entwicklungen" Stahl Und Eisen, vol. 116, No. 11, Nov. 11, 1996, pp. 65-73, 158.
McManus G J: "Ferritic Rolling Of Hot Rolled Sheet: Successful Use Of New Technology Could Open Doors" Iron and Steel Engineer, vol. 72, No. 8, Aug. 995 pp 53/54.
Bobig Paolo
Di Giusto Bruno
Butler Rodney A.
Danieli & C. Officine Meccaniche SpA
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