Method and arrangement for manufacturing hot-rolled steel strip
AssigneeSMS Schloemann-Siemag Aktiengesellschaft
InventorsJurgen Seidel, Wolfgang Rohde
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Abstract
A method and an arrangement for manufacturing hot-rolled steel strip from continuously cast initial materials in continuously successive work steps, wherein the continuously cast initial material is cut after solidifying to a certain length, is heated in a soaking furnace to rolling temperature and is introduced into a finishing rolling mill train for rolling out. The continuously cast initial material is introduced after being heated to a multiple-stand, reversible finishing rolling mill train and a coilbox connected downstream to the finishing rolling mill train.
Claims9
In a method for manufacturing hot-rolled steel strip from continuously cast initial material having a thickness of more than 50 mm in continuously successive work steps, including cutting the continuously cast initial material after solidifying into billets having a certain length, heating the billets in a soaking furnace to rolling temperature and introducing the billets to a finishing rolling mill train for rolling the billets into the desired size, wherein the improvement comprises introducing each billet after being heated into a finishing rolling mill train having a plurality of reversible rolling mill stands arranged one behind the other, rolling each billet in the finishing rolling mill train in a forward movement with a direct sequence of several rolling passes with relatively high moment and low rolling speed and in a reversing movement with a direct sequence of several rolling passes with relatively low moment and high rolling speed, and adjusting a ratio of rate of rotation between drive motors and work rolls of the rolling mill stands between the forward movement and the reversing movement by changing gear transmission of the rolling mill stands.
In an arrangement for manufacturing hot-rolled steel strip from continuously cast initial material having a thickness of more than 50 mm in continuously successive work steps, including means for cutting the continuously cast initial material after solidifying into billets having a certain length, a soaking furnace for heating the billets to rolling temperature, and means for introducing the billets into a finishing rolling mill train for rolling the billets into the desired size, the improvement comprising a casting plant for producing at least one billet, a soaking furnace arranged downstream of the casting plant, a cutting machine arranged between the casting plant and the soaking furnace, a finishing rolling mill train arranged downstream of the soaking furnace, the finishing rolling mill train including a plurality of rolling mill stands arranged one behind the other, a coil box arranged downstream of the finishing rolling mill train wherein at least one of the finishing rolling mill stands is a principal load-applying stand, the at least one principal load-applying stand being connected to a change-over gear unit.
Dependencies are inferred from the claim text.