94results about "Forging/pressing devices" patented technology

A method for producing a wide steel strip using thin slab continuous casting and rolling by the following steps a) casting a molten steel into a thin slab having a thickness of between 50 and 90 mm; b) cutting; c) soaking; d) heating by electromagnetic induction; e) descaling; f) rolling; g) cooling with laminar flow; and h) coiling. The method can effectively control the solution and precipitation of carbon, nitrogen, and sulfide in steel with a low cost. The process is easy and flexible, and steel can be produced in a wide range of categories. Further provided is a system for producing a wide steel strip with thin slab continuous casting and rolling.

A method for producing a hot-rolled steel strip from a steel melt in a continuous production process, with the strip running through uninterruptedly, comprises the following method steps: continuous casting of a steel strand (5) in a continuous casting mould (2) of a continuous casting installation (1), roll forming of the cast steel strand in a first group of roll stands (6) to form a pre-rolled hot strip (7), further roll forming of the pre-rolled hot strip in a second group of roll stands (19) to form a hot-rolled steel strip (21), setting the pre-rolled hot strip to rolling temperature between the first group of roll stands and the second group of roll stands in a temperature setting device (14), and winding up the hot-rolled steel strip into coils or dividing up the hot-rolled steel strip into panels. In order to increase flexibility in the production of different grades of steel and keep investment costs and operating costs low, it is proposed that the pre-rolled hot strip is descaled immediately before entering the temperature setting device, the pre-rolled hot strip is kept in a protective gas atmosphere in the temperature setting device and the pre-rolled hot strip is roll-formed in the second group of roll stands immediately after running through the temperature setting device. Furthermore, a combined casting and rolling installation for carrying out the method is proposed.

A process and an apparatus for preparing steel stock before hot rolling. The steps of preheating the stock (5, 16, 22) in a first induction furnace (6) so that the preheated stock enters a subsequent descaling apparatus (7) with a surface temperature of T1≧1000° C.; descaling the preheated stock by a plurality of water jets in a descaling apparatus (7); direct subsequent heating of the descaled stock in a second induction furnace (8), where the descaled stock enters the second induction furnace (8) at a temperature T2 which is ≧Tcurie of the stock and heating in the second induction furnace 8 is either in a largely inert or largely reducing protective gas atmosphere; passing the heated stock in a rolling mill (9), where the heated stock enters the rolling mill (9) at a temperature 1220° C.≧T3 1050° C.

The invention relates to a method for continuous casting and rolling with a high casting rate and subsequent hot-rolling of relatively thin metal strands, especially steel strands (1), the target temperatures (6) of the hot strip (2) being pre-defined. Said method enables temperature losses on the hot strip (2) to be reduced by increasing the temperatures of the work rolls (4) with a pre-determined rate of increase starting from a low initial temperature (5), and by adjusting the temperature (15) of the strip to a target roll temperature (6) of the hot strip (2) and / or by regulating or controlling the intensity of the roll cooling (18).

Operating method for a reversing rolling mill having at least one reversing rolling stand (2) for rolling a rolled metal stock (5), wherein the stock (5) passes the at least one reversing rolling stand (2) in a sequence of alternating direction passes (7) and after each pass, the stock is wound up by a reversing reel (3, 4), wherein only rolling oil, without water as a carrier medium, is applied to the stock (5) by rolling-oil applicator (6), between the at least one reversing rolling stand (2) and the winding-up reel (31, 41).