A non-magnetic steel structure for a steel or aluminium making process, which non-magnetic steel structure is arranged to enable penetration of a magnetic field from an electromagnetic stirrer or electromagnetic brake into a melt in a vessel for molten metal, wherein the non-magnetic steel structure includes manganese in the range 12-40 mass %.

A non-magnetic steel structure for a steel or aluminium making process, which non-magnetic steel structure is arranged to enable penetration of a magnetic field from an electromagnetic stirrer or electromagnetic brake into a melt in a vessel for molten metal, wherein the non-magnetic steel structure includes manganese in the range 12-40 mass %.

A cooled strand guide roller (1) mounted at more than one location for guiding a metal strand (S) in a continuous casting machine, and a method for cooling a strand guide roller (1) mounted at more than one location. An internally cooled strand guide roller (1) is mounted at more than one location. The height of the strand guide roller (1) is intended to be adjustable easily and quickly. The strand guide roller (1) has a collecting bar (7) for supplying the strand guide roller (1) with cooling water. The collecting bar (7) includes a plurality of brackets (10, 10a, 10b). Between two successive brackets (10, 10a, 10b), there is at least one coolant pipe (11) for fluidically connecting the brackets (10, 10a, 10b). An outer bracket (10a) has at least one first connection (8) for internal cooling of the cooled strand guide roller (1) and at least one second connection (9) for cooling the bearing blocks (4). The first connection (8) is fluidically connected to the ducts (3) of the individual rollers (2a, 2b) and the second connection (9) is fluidically connected to the bearing blocks (4) via the brackets (10).

A surface layer material of a hot rolling mill roll is provided. The surface layer has a chemical composition containing, by mass %, C: 2.4% or more and 3.5% or less, Si: 1.2% or more and 2.4% or less, Mn: 0.2% or more and 2.0% or less, Cr: 0.8% or more and 2.1% or less, Mo: 0.3% or more and 1.1% or less, Ni: 3.0% or more and 6.0% or less, V: 1.0% or more and 2.2% or less, Nb: 0.1% or more and 0.5% or less, REM: 0.0005%) or more and 0.1% or less, Al: 0.003% or more and 0.05% or less, and the balance being Fe and inevitable impurities. The contents of C, Cr, V, Nb, REM, and Al satisfy the relationships Cr+0.2C(0.24V+0.13Nb)3.0 and 0.01REM/Al3.2.

A hermetically sealed container is equipped inside thereof with: a melting furnace; a cooling roll for subjecting the molten metal tapped from the melting furnace to primary cooling to form a casting; and a rotatable cooling drum which receives the casting formed by the cooling roll and which subjects the casting to secondary cooling. The cooling drum has: a tubular member elongated in one longitudinal direction and having a receiving opening which is formed to open on one side of the tubular member to receive therein the casting, and a discharge opening which is formed to open on an opposite side of the tubular member to discharge the casting that has been subjected to the secondary cooling; and a transfer means for transferring the casting received from the receiving opening toward the discharge opening in response to the rotation of the tubular member.

The present invention provides a continuous rolling temperature control process for high-flux continuous casting and direct rolling of a continuous aluminum alloy cast slab, comprising a continuous casting machine, a through-beam laser transmitter K, a controller, a spraying head, and a spraying system. A liquid-state aluminum alloy metal melt passes through the continuous casting machine and then is cooled and solidified to form a continuous cast slab; the movement direction of the continuous cast slab is controlled by a lifting table so that the continuous cast slab passes through an interior of a traction machine and extends into a continuous rolling machine; and the through-beam laser transmitter K is arranged between the continuous casting machine and the traction machine. According to the present invention, comprehensive performance indicators required by different series of aluminum alloys under high-flux continuous casting and direct rolling conditions are distinguished, and the continuous rolling temperatures of continuous cast slabs of different series of high-flux continuous cast and rolled aluminum alloy sheets are correspondingly designed and controlled. A preset continuous rolling temperature enables the comprehensive performance of different series of aluminum alloys to reach a product quality standard, reduces interior defects and alleviates the problems of segregation and the like. The flow velocity (or flow rate) of the spraying system can be controlled to reduce the loss of a cooling liquid (an emulsion), thereby reducing the cost, and achieving the purpose of energy conservation and emission reduction.

An arch segment in an arch region of a strand-guiding device guides and deflects a cast strand made of metal into the horizontal after leaving a mold. The arch segment has an upper frame and a lower frame, on each of which a plurality of strand-guiding rollers are rotatably mounted. The upper frame and the lower frame are connected together such that the respective strand-guiding rollers thereof are arranged opposite one another in a mutually spaced manner and define an arch-shaped guide channel for guiding the cast strand. In order to reduce bulging of the cast strand in the arch region of the strand guide, at least one of the strand-guiding rollers on the upper frame and/or the lower frame is designed in the form of an axle roller.

A bearing block unit for supporting a continuous casting roll, including a bearing block and a roller bearing disposed inside the bearing block. The bearing provides an inner ring raceway, an outer ring raceway, and at least one row of rolling bodies disposed between the inner and outer ring raceways. The inner ring raceway is formed by a complete and continuous independent inner ring. The inner ring is fitted on a roll shaft of the continuous casting roll during installation, for the purpose of supporting the continuous casting roll. The outer ring raceway is at least partially formed by processing of an inner surface of an inner hole of the bearing block. The present invention also relates to a continuous casting roll line and a continuous casting machine using the bearing block unit.

Provided is a steel continuous casting method that can identify the final solidification position accurately and inexpensively. A steel continuous casting method comprises: increasing a gap between the facing cast steel support rolls toward a downstream side in a casting direction of the cast steel, in a section; applying rolling reduction to the cast steel by a roll segment having a plurality of pairs of cast steel support rolls whose rolling reduction amounts are controlled by hydraulic cylinders, at least in a predetermined range; measuring a pressure difference between a plurality of hydraulic cylinders and estimating a final solidification position of the cast steel based on the pressure difference; and controlling a rolling reduction amount of the cast steel so as to satisfy predetermined formulas in a roll segment estimated to be the final solidification position and a roll segment immediately preceding the roll segment.

Provided is a steel continuous casting method that can identify the final solidification position accurately and inexpensively. A steel continuous casting method comprises: increasing a gap between the facing cast steel support rolls toward a downstream side in a casting direction of the cast steel, in a section; applying rolling reduction to the cast steel by a roll segment having a plurality of pairs of cast steel support rolls whose rolling reduction amounts are controlled by hydraulic cylinders, at least in a predetermined range; measuring a pressure difference between a plurality of hydraulic cylinders and estimating a final solidification position of the cast steel based on the pressure difference; and controlling a rolling reduction amount of the cast steel so as to satisfy predetermined formulas in a roll segment estimated to be the final solidification position and a roll segment immediately preceding the roll segment.