Patent ID: 7909085
Filing Date: 2011-03-22
Classification: B21B,B22D

Abstract:
1. A process for the continuous production of hot rolled metal strips including: providing an ingot mould with a built-in crystallizer and a liquid core pre-rolling device located near the exit section of the crystallizer; providing a first pinch roll and a path deflecting and guiding device operated at least during predetermined periods of time; providing a second pinch roll; providing a third pinch roll and straightening device; providing heating devices and/or devices to keep the heat constant; providing a descaling device and at least three rolling stands, wherein the process comprises the following stages without intermediate interruptions: a) casting of a thin slab exiting the crystallizer at a speed of 4-16 m/min, with narrow sides between 15 and 50 mm and a core in which the metal is in a liquid state, b) implementation of a soft reduction of the slab through said pre-rolling device so as to obtain a completely solidified cast product with thickness between 15 and 40 mm, c) formation on the cast product of a free curve not confined in one or more dimensions, the free curve located between said first and said second pinch roll, d) implementation of a descaling operation on the cast product using said descaling device, e) implementation in succession of a plurality of rolling operations through said rolling stands on the cast product, thus eventually defining a strip with thickness between 0.8 and 12 mm.