Super thin strip hot rolling
AssigneesDanieli Technology, Inc., International Rolling Mill
InventorsVladimir B. Ginzburg, Fereidoon A. Bakhtar, Estore Adelino Donini
Life of this patent
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Abstract
The present invention is a method and apparatus for the production of thin metal strip by the hot rolling process. Significant improvements in the finished products can be made by the arrangement of the apparatus and the method of the present invention. The apparatus of the present invention is a metal processing line having a roughing reversing mill stand and a finishing reversing mill stand, each with different sized working rolls. A heating furnace precedes each mill stand. The apparatus in the present invention has the advantages of producing desired thin metal strip in the thickness range of about 0.4 to about 1.2 mm at temperatures appropriate for the specific metal being rolled.
Claims19
A hot-rolling process for producing thin metal strip comprising:
- heating a metal slab of an initial thickness to a first temperature suitable for rolling in a roughing mill;
- rolling the resultant heated slab of said initial thickness in at least one roughing reversing mill stand having work rolls of a first diameter to produce a strip of an intermediate thickness;
- re-heating said strip of said intermediate thickness to a second temperature suitable for working in a finishing mill, said second temperature being less than said first temperature;
- and
- rolling said strip of said intermediate thickness in a finishing mill having at least one finishing reversing mill stand having work rolls of a second diameter, less than the first diameter of said work rolls of said at least one roughing reversing mill stand, to produce a strip of a final thickness of about 0.4 mm to about 1.2 mm.
A hot-rolling process for producing thin metal strip comprising:
- heating a metal slab of an initial thickness to a first temperature suitable for rolling in a roughing mill;
- rolling the resultant heated slab of said initial thickness in at least one roughing reversing mill stand having work rolls of a first diameter to produce a strip of an intermediate thickness of about 1.5 mm to about 4 mm;
- re-heating said strip of said intermediate thickness to a second temperature suitable for working in a finishing mill, said second temperature being less than said first temperature;
- cleaning said strip of an intermediate thickness in a metal strip cleaning apparatus;
- and
- rolling said strip of said intermediate thickness in at least one finishing reversing mill stand having work rolls of a second diameter, less than the first diameter of said work rolls of said at least one roughing reversing mill stand, to produce a strip of a final thickness, wherein said strip produced is of a final thickness is about 0.4 to about 1.2 mm.
A hot-rolling process for producing thin metal strip comprising:
- heating a metal slab of an initial thickness to a first temperature in the range of 1,000° C. to 1250° C.;
- trimming said slab of an initial thickness in an edger;
- rolling said slab of said initial thickness in at least one roughing reversing mill stand having work rolls with a diameter in the range of 600 mm to 800 mm to produce a strip of an intermediate thickness of 1.5 mm to 4 mm;
- re-heating said strip of said intermediate thickness to a second temperature in the range of 850° C. to 1,000° C.;
- cleaning said strip of said intermediate thickness;
- shearing said strip;
- rolling said strip of an intermediate thickness in at least one finishing reversing mill stand having work rolls with a diameter in the range of 300 mm to 600 mm;
- and
- rolling said strip of an intermediate thickness for last two rolling passes at a temperature in the range of 650 to 800° C., to obtain the desired metallurgical properties, said strip produced is a strip of a final thickness of about 0.4 to about 1.2 mm.
Dependencies are inferred from the claim text.