Method for continuous casting and rolling with an increased casting rate and subsequent hot-rolling of relatively thin metal strands, especially steel strands, and continuous casting and rolling devic

A technology of casting speed and thin metal, which is applied in the direction of metal rolling mill stand, metal rolling, forging and pressing equipment, etc., and can solve the problem of low conveying speed of hot-rolled strip finishing mill

Inactive Publication Date: 2008-01-16
SMS DEMAG AG
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0002]Rolling with (high) casting speed, i.e. continuous casting plant and hot strip finishing mill connected, resulting in hot strip arranged after the continuous casting plant The conveying speed in the material finishing mill is low

Method used

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  • Method for continuous casting and rolling with an increased casting rate and subsequent hot-rolling of relatively thin metal strands, especially steel strands, and continuous casting and rolling devic
  • Method for continuous casting and rolling with an increased casting rate and subsequent hot-rolling of relatively thin metal strands, especially steel strands, and continuous casting and rolling devic
  • Method for continuous casting and rolling with an increased casting rate and subsequent hot-rolling of relatively thin metal strands, especially steel strands, and continuous casting and rolling devic

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Embodiment Construction

[0045] In a conventional hot strip finishing mill 3 for continuous casting of metals, especially steel slabs 1, thin strips are produced in discontinuous operation, for example rolling for approximately 180 seconds followed by approximately 20 seconds rolling interval. An average work roll surface temperature of approximately 120°C19 occurs during rolling, and the surface will cool to near water temperature during the batch process. After the hot strip 2 has been rolled several times, a roll temperature of approximately 90° C. can be measured at the end of the rolling program.

[0046] In the direct connection between the continuous casting plant and the hot-strip finishing mill 3 , during continuous rolling in the hot-strip finishing mill 3 , strip temperature losses occur which need to be minimized by suitable measures. For this reason it is proposed that the rolls should be operated at a higher working roll temperature for all or part of the rolling stands 3a...3n.

[004...

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Abstract

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).

Description

technical field [0001] The invention relates to a method of casting and rolling thin metal, especially steel continuous casting blanks at an increased casting speed on a multi-stand hot strip finishing mill under the condition of temperature adjustment of work rolls and then hot rolling to thin hot strips. A method for rolling a strip, and a corresponding casting and rolling device. Background technique [0002] Rolling with (high) casting speeds, ie the continuous casting plant and the hot-strip finishing mill connected, leads to a lower conveying speed in the hot-strip finishing mill arranged after the continuous casting plant. Despite the high starting temperature (for example about 1250° C.), the required end-rolling temperature of more than 850° C. cannot be observed under normal conditions due to temperature losses in the environment and in the work rolls. At the same time a large amount of energy is transferred to the work rolls. [0003] Such general conditions exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/46B21B37/74
CPCB21B31/07B21B27/106B21B2027/103B21B37/74B21B15/005B21B1/46Y10T29/49991B21B27/06B21B28/04
Inventor J·塞德尔J·克勒克纳
Owner SMS DEMAG AG
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