NL1038432C2 - Clad metal product and method of its manufacture. - Google Patents

Clad metal product and method of its manufacture. Download PDF

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Publication number
NL1038432C2
NL1038432C2 NL1038432A NL1038432A NL1038432C2 NL 1038432 C2 NL1038432 C2 NL 1038432C2 NL 1038432 A NL1038432 A NL 1038432A NL 1038432 A NL1038432 A NL 1038432A NL 1038432 C2 NL1038432 C2 NL 1038432C2
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NL
Netherlands
Prior art keywords
metal product
extruded
metal
profiles
clad
Prior art date
Application number
NL1038432A
Other languages
Dutch (nl)
Other versions
NL1038432A (en
Inventor
Achim Buerger
Daniel Schumacher
Original Assignee
Aleris Aluminum Koblenz Gmbh
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 Aleris Aluminum Koblenz Gmbh filed Critical Aleris Aluminum Koblenz Gmbh
Priority to NL1038432A priority Critical patent/NL1038432C2/en
Publication of NL1038432A publication Critical patent/NL1038432A/en
Application granted granted Critical
Publication of NL1038432C2 publication Critical patent/NL1038432C2/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/04—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a rolling mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/224—Edge rolling of flat products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/34—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/22—Making metal-coated products; Making products from two or more metals
    • B21C23/24—Covering indefinite lengths of metal or non-metal material with a metal coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/016—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of aluminium or aluminium alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/34—Coated articles, e.g. plated or painted; Surface treated articles

Description

CLAD METAL PRODUCT AND METHOD OF ITS MANUFACTURE
FIELD OF THE INVENTION
The invention relates to a clad metal product comprising of a core ingot or core sheet 5 having on at least one side thereof a cladding layer, and to a method of manufacturing such a clad metal product.
BACKGROUND TO THE INVENTION
For any description of alloy compositions or preferred alloy compositions, all references 10 to percentages are by weight percent unless otherwise indicated.
For many years metal ingots, particularly aluminium ingots, have been produced by semi-continuous casting processes wherein molten metal is being poured into the top of an open ended mould and a coolant has been applied directly to the solidifying surface of the metal as it emerges from the mould. Such a system is commonly used to produce large 15 rectangular-section ingots for the production of rolled products, e.g. aluminium alloy sheet products. There is a large market for composite ingots consisting of two or more layers of different alloys. Such ingots are used to produce, after rolling, clad sheet for various applications such as, but not limited to, brazing sheet, aerospace skin sheet, Alclad, clad automotive sheet, clad lithosheet, and other applications where it is desired that the 20 properties of the surface be different from that of the core.
The conventional approach to manufacture such clad sheet products has been to hot roll slabs of different alloys together by “pinning” the two together for example by means of welding, then to continue rolling to produce the finished product, for example as disclosed in US Patent No. 2,800,709.
25 Each of European patent EP-1200253-B1 and Canadian patent no. CA-2,376,273-C
disclose a composite product whereby a cladding sheet is placed onto at least one side of a core ingot and wherein the cladding sheets are cut of from a different ingot by means of sawing. This approach is also known in the art as sawn-clad liner plates.
US patent no. 6,251,527 discloses to use grooves in the core ingot to provide a liner 30 bed for receiving the cladding plate.
Patent application US-2005/0011630-A1 describes a process whereby two different alloys are cast in an open ended mould and by the use of special arranged dividers the first alloy pool contacts the second alloy pool at a point where the temperature of a self-supporting surface of the first alloy is between the solidus and liquidus temperature of the 35 first alloy, and whereby the two alloy pools are joined as two layers and cooling the joined alloy layers to form a composite ingot, and which is subsequently rolled to a clad metal product of final gauge.
1 0 3 8 4 32 2
DESCRIPTION OF THE INVENTION
It is an object of the invention to provide a clad metal product comprising of a core sheet having on at least one side thereof a cladding layer.
5 This and other objects and further advantages are met or exceeded by the present invention providing a clad metal product comprising of a core ingot or core sheet having on at least one side thereof a cladding layer, and wherein the cladding layer is made from two or more extruded metal profiles coupled to each other.
This clad metal product provides an alternative to the so-called rolled clad liner plates 10 and to the sawn clad liner material. An advantage is that it provides a large flexibility with regard to the width of the clad material as multiple extruded profiles can be coupled to each other with increasing width of the product. This allows for more standardisation compared to casting and rolling a liner plate tailored to each clad metal product dimension. The extruded clad liners may be used to manufacture single clad product, double-clad products, but also 15 multi-layered clad products.
In one embodiment of the clad metal product the extruded liner materials are made from alloys having a similar or identical chemical composition.
In another embodiment of the clad metal product the extruded liner materials applied on at least one side of the core may have different chemical compositions. This would allow for 20 the production of a clad metal product having tailored properties at different locations in the clad material as a resultant of the corresponding different chemical compositions. As an example a brazing sheet product may be made having a core sheet and a cladding of an AlSi-based brazing material of varying composition, for example the Si-content may vary over the width (e.g. 2 to 3 meters) of the brazing sheet product, whereby the edges of the 25 brazing sheet product over a range of about 5 to 40 cm have a higher Si-content (e.g. about 12% Si) than the broader centre part of the sheet having a lower Si-content (e.g. about 8% Si).
In an embodiment of the clad metal product the extruded liner material is provided with holes or multi-ports in the direction of extrusion and whereby the holes may be filed in whole 30 or in part with a brazing flux material. In this way pre-fluxed brazing sheet material may be provided.
In an embodiment the core material of the clad metal product can be a magnesium alloy or an aluminium alloy. The aluminium alloy may be any aluminium alloy including ASTM standards aluminium alloy from the 1xxx, 2xxx, 3xxx, 4xxx, 5xxx, 6xxx, 7xxx, and 8xxx-35 series.
In an embodiment the liner material of the clad metal product can be a magnesium alloy or an aluminium alloy. The aluminium alloy may be any aluminium alloy including ASTM
3 standards aluminium alloy from the 1xxx, 2xxx, 3xxx, 4xxx, 5xxx, 6xxx, 7xxx, and 8xxx-series.
In an embodiment the extruded profiles are coupled to each other via an interlocking connection. The connection may be simple or complex in its design, but serves amongst 5 others that the extruded profiles remain aligned during a subsequent rolling operation.
In an embodiment the cladding layer is formed by extruded profiles wherein the profiles forming the sides of the liner material have an adjusted edge shape tailored in dependence of the plastic flow behaviour during rolling and thereby controlling or limiting the amount of overflow and consequently the need for edge trimming. In this way it is possible to limit the 10 amount of scrap obtained in rolling operations. Examples of such tailed edge shapes are known for example from international application WO-2010/000553, Fig. 3A to 3C, and incorporates herein by reference.
In another aspect of the invention it relates to a method of manufacturing a clad metal 15 product comprising the sequential steps of: providing an ingot or sheet of a first metal to form the core material, providing an extruded profile of a second metal and of a third metal, placing the extruded profiles of said second metal and third metal next to each other forming a cladding layer onto at least one side of the ingot of the first metal 20 to form a stack of metals, and bonding the stack of metals by one or more rolling passes in a rolling operation to form a clad metal product.
The ingot or plate of the core alloy is provided as known in the art and involves casting an ingot of the alloy, preheat and/or homogenisation, if required some rolling to desired 25 thickness, and scalping.
The thickness of the cladding layer is tailored to meet the properties of the clad metal product. To prepare the stack of metals suitable for rolling into a clad metal product, the extruded profiles may have typically a thickness in a range of about 20 to about 100 mm, for example about 40 mm, about 50 mm, or about 75 mm, and comparable to those gauges 30 applied when starting from a rolled liner plate or from a sawn liner plate material. To produce the extruded profiles all regular extrusion processes can be applied. If appropriate the surface of the extruded profiles may be pre-treated, e.g. scalping, grinding or milling, prior to placing these onto the core ingot.
The coupled stack of core alloy and liner material(s) are subsequently reheated in 35 preparation for roll bonding and then subjected to the mechanical roll bonding process whereby the core and clad materials are forced into conformance with each other by rollers. The rolling operation may involve hot rolling or reverse hot rolling. The massive deformation 4 may produce a metallurgical bond at the interface between the different alloys. The resulting clad product may subsequently be cold rolled, trimmed and annealed, as is known in the art for many other clad metal products.
5 BRIEF DESCRIPTION OF THE DRAWING.
Fig. 1 is a schematic perspective view of a cross-section of an embodiment of the clad metal product in accordance with this invention prior to metallurgical bonding;
In this Fig. 1 the core is made of a first metal and onto the upper-surface a cladding material or a lining material is placed formed by three extruded metal profiles coupled to 10 each other. In this example three profiles have been used, but it may also be formed by more profiles, e.g. 4, 5, or more. Also the lower-surface can be provided in a similar way with a cladding material. The coupling may be obtained by a regular welding tag connection or by an interlocking of the extruded profiles and which can be achieved via various arrangements (simple or complex) as known in the art, and would include also a pen-groove connection, a 15 dove-tail connection, etc. This stack of metals can be processed into clad metal sheet products as is known in the art for other rolled bonded materials.
It will be appreciated by those of ordinary skill in the art that the system and method of producing clad metal product can be embodied in other specific forms without departing from 20 the spirit or essential character thereof. The presently disclosed embodiments are therefore considered in all respects to be illustrative and not restrictive.
25 30 1038432

Claims (9)

1. Een bekleed metaalproduct omvattende een kernlaag met aan ten minste één zijde daarvan een bekledingslaag, en waarbij de bekledingslaag is vervaardigd van twee of 5 meer gekoppelde geëxtrudeerde metaalprofielen.A coated metal product comprising a core layer with a coating layer on at least one side thereof, and wherein the coating layer is made of two or more coupled extruded metal profiles. 2. Een bekleed metaalproduct volgens conclusie 1, waarbij de twee of meer geëxtrudeerde metaalprofielen dezelfde chemische samenstelling hebben.A coated metal product according to claim 1, wherein the two or more extruded metal profiles have the same chemical composition. 3. Een bekleed metaalprodukt volgens conclusie 1, waarbij de twee of meer geëxtrudeerde metaalprofielen een verschillende chemische samenstelling hebben.A coated metal product according to claim 1, wherein the two or more extruded metal profiles have a different chemical composition. 4. Een bekleed metaalprodukt volgens één der conclusies 1 tot 3, waarbij de geëxtrudeerde metaalprofielen met elkaar zijn gekoppeld middels een in elkaar 15 grijpende verbinding.4. A coated metal product according to any one of claims 1 to 3, wherein the extruded metal profiles are coupled to each other by means of an interlocking connection. 5. Een bekleed metaalprodukt volgens één der conclusies 1 tot 4, waarbij de kernlaag vervaardigd is van een aluminiumlegering of van een magnesiumlegering.A coated metal product according to any of claims 1 to 4, wherein the core layer is made of an aluminum alloy or a magnesium alloy. 6. Een bekleed metaalprodukt volgens één der conclusies 1 tot 5, waarbij de twee of meer geëxtrudeerde metaalprofielen vervaardigd zijn van een aluminiumlegering of van een magnesiumlegering.A coated metal product according to any of claims 1 to 5, wherein the two or more extruded metal profiles are made from an aluminum alloy or from a magnesium alloy. 7. Werkwijze voor het vervaardigen van een bekleed metaalprodukt, omvattende de 25 stappen van het verschaffen van een blok of strip van een eerste metaal voor het vormen van de kernlaag; verschaffen van een geëxtrudeerd profiel van een tweede metaal en van een derde metaal; 30. het naast elkaar positioneren van de geëxtrudeerde profielen van het tweede en derde metaal tot het vormen van een bekledingslaag op ten minste één zijde van het blok of strip van het eerste metaal voor het vormen van een stapel van metalen; en verbinden van de stapel van metalen door middel van één of meer walspassen in 35 een walsoperatie voor het vormen van een bekleed metaalprodukt.7. Method for manufacturing a coated metal product, comprising the steps of providing a block or strip of a first metal for forming the core layer; providing an extruded profile of a second metal and of a third metal; 30. juxtaposing the extruded profiles of the second and third metals to form a cladding layer on at least one side of the block or strip of the first metal to form a stack of metals; and joining the stack of metals by means of one or more roll passes in a rolling operation to form a coated metal product. 8. Werkwijze volgens conclusie 7, waarbij de walsoperatie warmwalsen omvat. 1038432 5The method of claim 7, wherein the rolling operation comprises hot rolling. 1038432 5 9. Werkwijze volgens conclusie 7 of 8, waarbij de walsoperatie omvat warm reverse-walsen. 1038432The method of claim 7 or 8, wherein the rolling operation comprises hot reverse rolling. 1038432
NL1038432A 2010-12-07 2010-12-07 Clad metal product and method of its manufacture. NL1038432C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL1038432A NL1038432C2 (en) 2010-12-07 2010-12-07 Clad metal product and method of its manufacture.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1038432A NL1038432C2 (en) 2010-12-07 2010-12-07 Clad metal product and method of its manufacture.
NL1038432 2010-12-07

Publications (2)

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NL1038432A NL1038432A (en) 2011-03-07
NL1038432C2 true NL1038432C2 (en) 2011-10-04

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789497A (en) * 1972-09-29 1974-02-05 Aluminum Co Of America Method of producing composite metal article
US5495656A (en) * 1993-08-19 1996-03-05 Amcast Industrial Corporation Method of making blanks and clad parts
GB2318317A (en) * 1996-10-21 1998-04-22 Draftex Ind Ltd Joining strip material
DE19813554A1 (en) * 1998-03-27 1999-09-30 Vaw Ver Aluminium Werke Ag Composite sheet or strip in sandwich structure and process for its production

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Effective date: 20140701