Aluminum hot strip rolling train and method for hot rolling an aluminum hot strip

Patent metadata

Field	Value
Publication number	US-2016256906-A1
Application number	US-201415030446-A
Country	US
Kind code	A1
Filing date	Sep 16, 2014
Priority date	Oct 25, 2013
Publication date	Sep 8, 2016
Grant date	—

Abstract

The invention relates to an aluminum hot strip rolling train comprises a multi-stand tandem finish rolling train ( 2 ) with at least one winding reel ( 8 ) arranged downstream in the rolling direction and at least one paired cooling section ( 4 ). The aim of the invention is to provide a solution which allows cooling curves and temperature-time paths in the rolling stock to be adjusted in an improved manner during an aluminum hot strip rolling process in a tandem finish rolling train. This is achieved in that the at least one cooling section ( 4 ) is arranged in the discharge region of the aluminum hot strip rolling train, and the tandem finish rolling train ( 2 ) is paired with at least one trimmer ( 6 ) arranged downstream in the rolling direction.

First claim

1 . Aluminum hot strip rolling train, comprising a multi-stand tandem finishing rolling train ( 2 ) having downstream thereof, in a rolling direction, a winding reel ( 8 ) and at least one associated cooling section ( 4 ),
characterized in that the at least one cooling section ( 4 ) is arranged in an outlet region of the aluminum hot strip rolling train and at least one intermediate cooling device ( 5 ) is arranged between at least two rolling stands ( 1 ) of the multi-stage tandem finishing rolling train, the tandem finishing rolling train ( 2 ) is associated with at least one trimming shears located downstream thereof in the rolling direction.

2 . (canceled)

3 . Aluminum hot strip rolling train according to claim 1 , characterized in that strip drying means ( 9 ) is arranged, in the rolling direction, downstream of the cooling section ( 4 ) and upstream of the winding reel ( 8 ) and which has a drying device and/or a cooling medium removing device.

4 . Aluminum hot strip rolling train according to claim 1 , characterized in that the cooling section ( 4 ) and the intermediate cooling device ( 5 ) are formed for carrying out laminar cooling or spray cooling.

5 . Aluminum hot strip rolling train according to claim 1 , characterized in that the cooling section ( 4 ) and the intermediate cooling device ( 5 ) are supplied with a rolling emulsion or demineralized water as a cooling medium.

6 . Aluminum hot strip rolling train according to claim 1 , characterized in that the aluminum hot strip rolling train comprises a control and/or regulating device ( 11 ) that controls the rolling stands ( 1 ), the cooling section ( 4 ), and the intermediate cooling device ( 5 ) independently from each other, and rolling stand speed, intermediate cooling, and the winding temperature are adapted to a respective aluminum hot strip material and, in particular, are set and regulated independently from each other.

7 . Aluminum hot strip rolling train according to claim 1 , characterized in that an upstream strip cooler ( 3 ) is arranged in an inlet region of the tandem finishing rolling train.

8 . Aluminum hot strip rolling train according to claim 1 , characterized in that in the control and/or regulating device ( 11 ) a process model ( 16 ) is stored and mapped and that changes of heat transfer coefficients during cooling of the aluminum hot strip ( 7 ) are monitored and used in control and/or regulating processes of the aluminum hot strip rolling train and, in particular, of the tandem finishing rolling train ( 2 ) with the upstream cooler ( 3 ), and/or the intermediate cooling device ( 5 ), and/or cooling section ( 6 ), and/or strip drying means ( 9 ).

9 . Aluminum hot strip rolling train according to claim 1 , characterized in that a process model ( 16 ) is stored and mapped in the control and/or regulating device ( 11 ), that feedback of respective temperature levels of the aluminum hot strip ( 7 ) on friction between respective rolls and respective aluminum hot strip material is monitored and used in control and/or regulating processes of the aluminum hot strip rolling train, in particular of the tandem finishing rolling train ( 2 ) with the upstream cooler ( 3 ), and/or the intermediate cooling device ( 5 ) and/or cooling section ( 6 ), and/or strip drying means ( 9 ).

10 . A method of hot rolling an aluminum hot strip ( 7 ) of AlMgSi-alloy from AA6xxx-group in an aluminum hot strip rolling train, comprising the steps of:
heating an aluminum alloy ingot of AlMnSi-alloy from AA6xxx-group to a temperature from 490° C. to 570° C.; rough rolling the aluminum alloy ingot to an aluminum hot strip having a thickness from 20 mm to 50 mm in a roughing train of the aluminum hot strip rolling train in a temperature range above 400° C.; rolling the aluminum hot strip ( 7 ) in a multi-stand finishing rolling train ( 2 ) of the aluminum hot strip rolling train with activated cooling devices ( 5 ) between the tandem stands ( 1 ) of the finishing rolling train ( 2 ) so that during last two rolling passes in a temperature range between 300° C. and 370° C., a deformation rate between 30% and 50% and a desired hot strip thickness between 2 m and 6 mm is achieved; trimming of the hot strip; and cooling of the aluminum hot strip in an outlet region of the aluminum hot strip rolling train with a cooling section ( 4 ) to a reeling temperature of below 250° C., preferably to a reeling temperature from 150° C. to 230° C., wherein the process of finish rolling in the multi-stand tandem finishing rolling train ( 2 ) is carried out within a time period of less than 60 sec,

11 . A method of hot rolling an aluminum hot strip ( 7 ) of AlMg-alloy from AA5xxx-group in an aluminum hot strip rolling train, comprising the steps of:
heating an aluminum alloy ingot of AlMg-alloy from AA5xxx-group in a temperature 450° C. to 570° C.; rough rolling the aluminum alloy ingot to an aluminum hot strip having a thickness from 20 mm to 50 mm in a roughing train of the aluminum hot strip rolling train in a temperature range above 400° C.; rolling the aluminum hot strip ( 7 ) in a multi-stand finishing rolling train ( 2 ) of the aluminum hot strip rolling train with activated cooling devices ( 5 ) between the tandem stands ( 1 ) of the finishing rolling train ( 2 ) so that during last two rolling passes in a temperature range between 250° C. and 300° C., a deformation rate between 30% and 50% and a desired hot strip thickness between 2 m and 8 mm is achieved; trimming of the hot strip; and cooling of the aluminum hot strip in an outlet region of the aluminum hot strip rolling train with a cooling section ( 4 ) to a reeling temperature of below 250° C., preferably to a reeling temperature from 150° C. to 230° C., and winding up the aluminum hot strip, wherein the process of finish rolling in the multi-stand tandem finishing rolling train ( 2 ) is carried out within a time period of less than 60 sec,

12 - 13 . (canceled)

14 . A method of hot rolling an aluminum hot strip ( 7 ) of AlMg-alloy from AA5xxx-group in an aluminum hot strip rolling train, comprising the steps of:
heating an aluminum alloy ingot of AlMg-alloy from AA5xxx-group in a temperature 450° C. to 570° C.; rough rolling the aluminum alloy ingot to an aluminum hot strip having a thickness from 20 mm to 50 mm in a roughing train of the aluminum hot strip rolling train in a temperature range above 400° C.; rolling the aluminum hot strip ( 7 ) in a multi-stand finishing rolling train ( 2 ) of the aluminum hot strip rolling train with activated cooling devices ( 5 ) between the tandem stands ( 1 ) of the finishing rolling train ( 2 ) so that during last two rolling passes in a temperature range between 250° C. and 300° C., a deformation rate between 30% and 50% and a desired hot strip thickness between 2 m and 8 mm is achieved; trimming of the hot strip; and winding of the aluminum hot strip with or without use of a cooling section, wherein the process of finish rolling of the strip element is carried out within a time period of less than 60 sec,

Assignees

• Sms Group Gmbh

Inventors

• Breuer Michael

Classifications

• B21B2015/0057

  Coiling the rolled product · CPC title

• B21B2001/225

  by hot-rolling · CPC title

• B21B1/22 Primary

  for rolling {plates, strips,} bands or sheets of indefinite length (B21B1/42 takes precedence) · CPC title

• B21B3/00 Primary

  Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences {; Rolling of aluminium, copper, zinc or other non-ferrous metals}(altering special metallurgical properties of alloys, other than structure consolidation or mechanical properties resulting therefrom C21D, C22F) · CPC title

• B21B45/0215

  using liquid coolants, e.g. for sections, for tubes · CPC title