EP1454680A1 - Verfahren zum Walzen von Aluminium - Google Patents

Verfahren zum Walzen von Aluminium Download PDF

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Publication number
EP1454680A1
EP1454680A1 EP03380047A EP03380047A EP1454680A1 EP 1454680 A1 EP1454680 A1 EP 1454680A1 EP 03380047 A EP03380047 A EP 03380047A EP 03380047 A EP03380047 A EP 03380047A EP 1454680 A1 EP1454680 A1 EP 1454680A1
Authority
EP
European Patent Office
Prior art keywords
rolling
aluminum
thickness
sheet
subjected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03380047A
Other languages
English (en)
French (fr)
Inventor
Juan Luis Serratosa Caturla
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bancolor SL
Original Assignee
Bancolor SL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bancolor SL filed Critical Bancolor SL
Priority to EP03380047A priority Critical patent/EP1454680A1/de
Publication of EP1454680A1 publication Critical patent/EP1454680A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—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
    • B21B3/003—Rolling non-ferrous metals immediately subsequent to continuous casting, i.e. in-line rolling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—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
    • B21B2003/001—Aluminium or its alloys

Definitions

  • the present invention refers to a new aluminum rolling process in which, preferably starting from scraps of this material as raw material, an aluminum strip is obtained with thickness in the range of 0.25 mm.
  • the object of the invention is to obtain this result with a drastic reduction in process time, which could be placed in the range of 40%.
  • the first system consists of hot-mill rolling, plus cold rolling and thermal treatments. More specifically, this system starts from rectangular aluminum blocks in the range of 50 cm high and 6 m long, the width of which is variable based on the width of the sheet intended to be obtained in the end, blocks commonly referred to as slabs, which on both their upper and lower face typically have slag and harmful elements for rolling, due to which an initial milling phase is carried out on both sides, after which the heating thereof ensues to a temperature comprised between 400 and 450°C. Then, they are introduced into a rolling mill which is provided with a roller table for transporting the strip in the longitudinal direction, and four rolling rollers, two working rollers and two support rollers, such that, upon clamping of the slab, the latter becomes thinner and longer.
  • cold rolling follows in which the sheet undergoes three more passes through the corresponding rolling mill, attaining a 2 mm thickness for the aluminum sheet, but with a considerable increase in metal hardness, being thus necessary to carry out an annealing phase so that the cold rolling may proceed, the sheet undergoing two more passes until reaching the 0.6 mm thickness.
  • the aluminum undergoes a new annealing and two new cold rolling passes in order to attain the definitive thickness intended to be obtained, 0.25 mm, with suitable mechanical properties.
  • the different operative phases of this process consume a time which can be placed in the range of 41 hours.
  • the second system which has been previously mentioned consists of a continuous casting process in which the liquid metal is obtained from melting scraps or ingots, urging said cast metal to pass between two rollers where, concurrently to its cooling and solidification, a continuous, 8 mm-thick sheet is produced.
  • the rolling process proposed by the invention constitutes a significant technological advance in this field as it achieves, as previously mentioned, a new and drastic reduction in the process time, which can be placed in the range of 19 hours.
  • said process also starts from an initial continuous casting phase for obtaining the cast metal which, immediately after exiting the furnace and, through the corresponding runner, is urged to pass through a twin-belt rolling machine where its solidification occurs, outputting a 19 mm-thick sheet at a speed of 8 or 9 m/min.
  • the obtained strip is urged to pass in tandem through three successive hot rolling towers, in each one of which the aluminum sheet thickness is gradually reduced, reaching a level of 1.5 mm and at a speed of 100 m/min.
  • the aluminum sheet is subjected to two cold rolling passes by which its 1.5 mm thickness becomes 0.54 mm, afterwards a conventional annealing phase is carried out, and it is finally subjected to a new pass through a cold roller where the 0.54 mm-thick aluminum sheet attains the definitive 0.25 mm thickness.
  • a roller platform (7) is assembled at the machine (5) outlet connecting said machine to a first rolling tower (8), specifically hot rolling, with the classic support roller (9) and clamping roller (10) pair.
  • a first rolling tower (8) specifically hot rolling
  • the classic support roller (9) and clamping roller (10) pair Immediately after the rolling tower (8), there is another rolling tower (8') having identical features, and immediately after, a third tower (8"), such that at the outlet of the latter, the aluminum sheet has reached 1.5 mm thickness and advances at a speed of 100 m/min.
  • two winding machines (9-9') are assembled, alternatively collecting the material in respective coils (10-10') whose parity is determined by the continuous character of the process, since the coils (10-10') are normally in the range of 5,000 kg compared to said 90 t furnace (1) load, being thus necessary that, in order not to interrupt the process, when the coil (10) reaches its maximum capacity, the winding machine (9) stops operating, winding machine (9') starting while the full coil (10) is removed from the first one.
  • the elements corresponding to the end phases of the process have not been shown, in other words, the two cold rollers, the annealing furnace and also the cold end roller, as they constitute elements which structurally and functionally correspond to those with which a conventional continuous casting process also ends.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
EP03380047A 2003-03-04 2003-03-04 Verfahren zum Walzen von Aluminium Withdrawn EP1454680A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03380047A EP1454680A1 (de) 2003-03-04 2003-03-04 Verfahren zum Walzen von Aluminium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03380047A EP1454680A1 (de) 2003-03-04 2003-03-04 Verfahren zum Walzen von Aluminium

Publications (1)

Publication Number Publication Date
EP1454680A1 true EP1454680A1 (de) 2004-09-08

Family

ID=32799166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03380047A Withdrawn EP1454680A1 (de) 2003-03-04 2003-03-04 Verfahren zum Walzen von Aluminium

Country Status (1)

Country Link
EP (1) EP1454680A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238248A (en) * 1978-08-04 1980-12-09 Swiss Aluminium Ltd. Process for preparing low earing aluminum alloy strip on strip casting machine
US5104465A (en) * 1989-02-24 1992-04-14 Golden Aluminum Company Aluminum alloy sheet stock
US5496423A (en) * 1992-06-23 1996-03-05 Kaiser Aluminum & Chemical Corporation Method of manufacturing aluminum sheet stock using two sequences of continuous, in-line operations

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238248A (en) * 1978-08-04 1980-12-09 Swiss Aluminium Ltd. Process for preparing low earing aluminum alloy strip on strip casting machine
US5104465A (en) * 1989-02-24 1992-04-14 Golden Aluminum Company Aluminum alloy sheet stock
US5496423A (en) * 1992-06-23 1996-03-05 Kaiser Aluminum & Chemical Corporation Method of manufacturing aluminum sheet stock using two sequences of continuous, in-line operations

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