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

Patent metadata

Field	Value
Publication number	US-10384248-B2
Application number	US-201415030446-A
Country	US
Kind code	B2
Filing date	Sep 16, 2014
Priority date	Oct 25, 2013
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

An aluminum hot strip rolling mill including a multi-stand tandem finishing rolling train ( 2 ), at least one winding reel ( 8 ) arranged downstream, in the rolling direction, of the multi-stand tandem finishing rolling train, a cooling section ( 4 ) provided in the outlet region of the aluminum hot strip rolling mill, and at least one trimmer ( 6 ) paired with the multi-stand tandem finishing rolling train and arranged downstream, in the rolling direction, in the rolling direction, of the multi-stand tandem rolling mill train.

First claim

The invention claimed is:

1. 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 tandem finishing rolling train ( 2 ) of the aluminum hot strip rolling train with activated cooling devices ( 5 ) between the tandem stands ( 1 ) of the multi-stand tandem finishing rolling train ( 2 ) so that during rolling in last two tandem stand 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 mm and 8 mm is achieved;
trimming of the hot strip; and
winding of the aluminum hot strip, wherein the process of finish rolling of the strip element is carried out within a time period of less than 60 sec.

2. 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 tandem finishing rolling train ( 2 ) of the aluminum hot strip rolling train with activated cooling devices ( 5 ) between the tandem stands ( 1 ) of the multi-stand tandem finishing rolling train ( 2 ) so that during rolling in last two tandem stands 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 mm 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., 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.

3. 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 AlMgSi-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 tandem finishing rolling train ( 2 ) of the aluminum hot strip rolling train with activated cooling devices ( 5 ) between tandem stands ( 1 ) of the multi-stand tandem finishing rolling train ( 2 ) so that during rolling in last two tandem stands 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 mm and 6 mm is achieved;
trimming of the hot strip; and
cooling of the aluminum hot strip in an outlet region of the multi-stand tandem finishing rolling train with a cooling section ( 4 ) to a reeling temperature of below 250° 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.

4. A method of hot rolling aluminum hot strip ( 7 ) of AlMgSi-alloy from AA6xxx-group according to claim 3 , wherein the cooling step comprises cooling of the aluminum hot strip to a reeling temperature from 150° C. to 230° C.

5. A method of hot rolling aluminum hot strip ( 7 ) of AlMgSi-alloy from AA5xxx-group according to claim 3 , wherein the cooling step comprises cooling of the aluminum hot strip to a reeling temperature from 150° C. to 230° C.

Assignees

• Sms Group Gmbh

Inventors

• Breuer Michael

Classifications

• B21B2015/0021

  in the rolling direction · 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

• B21B2015/0057

  Coiling the rolled product · CPC title

• B21B2003/001

  Aluminium or its alloys · CPC title