DE102014111625A1 - Composite material and method for producing a composite material - Google Patents

Abstract

Composite material, wherein the composite material comprises a first shroud (1), a second shroud (2) and at least one core strip (3), wherein the shrouds (1, 2) and the at least one core strip (3) are interconnected by means of plating, wherein the shrouds (1, 2) completely enclose the at least one core strip (3) and methods for producing a composite material.

Description

The present invention relates to a composite material according to the preamble of claim 1 and a method for producing a composite material according to the preamble of claim 7, 8 or 9.

Composite materials of the aforementioned type are for example from the DE 20 2012 004 824 U1 known. Here, roll-clad strips are represented by their manufacturing process and distinguished into so-called overlay, inlay and onlay ribbons. In overlay tapes, a carrier tape receives on one or both sides of a full-surface covering or support belt. Inlay tapes are stripe-shaped Einlageplattierungen of base or precious metals embedded on one or both sides. In onlay tapes, thin, strip-shaped contact materials are directly plated on one or both sides.

There are also so-called step profiles or their manufacturing process, for example from the DE 10 2010 045 011 A1 known. Here, essentially a first strip or sheet arrangement, comprising a carrier strip and at least one support strip, is plated on a second strip or sheet arrangement, comprising a carrier strip and at least one support strip. The first plate assembly is then separated again from the second plate assembly, so that ultimately result in a plating two plated strips or sheets with a stepped profile in cross-section.

Furthermore, methods have become known in which so-called "lost inlays" are used. Here, for example, several strips including inlays are plated on top of each other, whereby the inlays do not make any connection with the strips but are removed after plating. For example, a step profile can be created. Such a method is for example from the DE 102 58 824 B3 known.

Ultimately, however, the resulting composite materials have in common that at least two cladding partners made of different materials are exposed to the environment. During further processing, in particular by thermal joining, the presence of at least two different materials must be taken into account. Also, corrosion-related aspects in the case of local juxtaposition of different materials must be considered. Thus, the disadvantage of the prior art is in particular that at least two materials are open to the environment and this juxtaposition of different material properties often has a very lasting influence on further processing. Thus, for example, during thermal joining, for example by welding or soldering, no homogeneous defect-free joints or joining seams can be represented. In individual cases, better quality materials can at best be remedied, which, however, results in a significantly higher processing effort.

This is where the present invention sets out and proposes to propose an improved composite material, in particular to propose a composite material which overcomes or at least reduces the drawbacks outlined above, in particular to propose a composite material which is less susceptible to corrosion and / or can be better thermally joined.

According to the invention this object is achieved by a composite material having the characterizing features of claim 1. A core band arranged between the shrouds or arranged core bands may be enclosed by the shrouds, wherein the shrouds in turn form the surfaces of the composite material. In other words, the core tapes do not appear to the outside, so that the relevant for the further processing of the composite surface is formed exclusively by the shrouds. Thus, a composite material can be provided which has the advantageous properties of a composite produced by plating, but can provide a homogeneous material composition to the outside. In this respect, the corrosion risks of juxtaposed different materials to a certain extent are not present, since the surface of the composite material consists of the shrouds homogeneously. Also, a thermal joining, such as soldering or welding, is less problematic and process-reliable, since ultimately only a predetermined joint partner on the part of the composite material, ie the shrouds, are available.

Further advantageous embodiments of the proposed invention will become apparent in particular from the features of the dependent claims. The objects or features of the various claims can basically be combined with each other arbitrarily.

In an advantageous embodiment of the invention can be provided that the shrouds consist of identical materials. Basically, the shrouds can consist of different materials. This also results in a high degree of homogeneous surfaces, just a first with respect to the material homogeneous surface and a second in terms of the material homogeneous surface. A highest degree of homogeneous surface with respect to the material results accordingly if both shrouds are made of the same material.

In a further advantageous embodiment of the invention can be provided that the composite material has only two shrouds as shrouds. An essential aspect of the composite material according to the invention is to provide a surface which is as homogeneous as possible with respect to the material. As far as this exclusively the two shrouds form the surface and, for example, no further on the surface aufplattierten tapes, this aspect can be advantageously met.

In a further advantageous embodiment of the invention can be provided that the composite material comprises more than one core band, wherein the core bands consist of the same or different materials. In principle, the composite material can be provided with properties, for example bending stiffnesses, torsional stiffnesses, behavior in the case of temperature changes, electrical conductivity, thermal conductivity, reduction in specific weight, component strength, etc., which the shroud as such does not or does not have to the desired extent , Of course, this also applies vice versa, ie the shrouds can provide the composite with properties that the core tape as such does not or not to the desired extent. Different materials for the core bands can be used to further optimize the adaptation to the desired properties of the composite material.

In a further advantageous embodiment of the invention can be provided that the shrouds and / or the core bands of metal, in particular a ductile metal exist.

In a further advantageous embodiment of the invention can be provided that the core band, in particular the core bands, consist of a non-amorphous metal.

Another object of the present invention is to propose a method for producing a composite material.

According to the invention this object is achieved by a method having the characterizing features of claim 7, 8 or 9.

According to claim 7, method steps are proposed which are suitable for the production of a composite material in which the core band or the core bands are completely enclosed by the shrouds. For this purpose, the shrouds are fed continuously and the at least one core band is supplied to the plating device. The clad strip leaves the plating device in the rolling direction and has corresponding areas with and without core band. As far as the clad strip is cut at the points without core band, the composite material according to the invention results, in which the at least one core band is enclosed by the two shrouds.

In accordance with claim 8 also method steps are proposed, which are suitable for producing a composite material, in which the core band or the core bands are completely enclosed by the shrouds. Essentially, the breaking point of the core band, in particular at predetermined breaking points of the core band, is occasionally exceeded by the roll cladding, so that the core band tears and results in the rolling direction areas with and without core band. Accordingly, the plated strip can be separated at a position without a core strip and the composite material according to the invention is produced. In accordance with claim 9 also method steps are proposed, which are suitable for the production of a composite material, in which the core band or the core bands are completely enclosed by the shrouds. Essentially, a loose composite of the shrouds and the at least one core tape is assembled as a package prior to plating, and then the sheet is roll-laminated.

Further advantageous embodiments of the proposed invention will become apparent in particular from the features of the dependent claims. The objects or features of the various claims can basically be combined with each other arbitrarily.

In an advantageous embodiment of the invention can be provided that the Walzplattiereinrichtung more than a core band is supplied. In this way, composites can be produced with basically any number of core bands.

In a further advantageous embodiment of the invention can be provided that the at least one core tape before plating has a thickness greater than 50 microns to 10 mm. The lower limit results essentially from the technical application of a minimum thickness of the core band. The upper limit is essentially related to the basic possibilities of cold-rolled plate-forming or strip-forming.

In a further advantageous embodiment of the invention can be provided that the Thickness of the first shroud plus the thickness of the second shroud prior to plating is greater than the thickness of the thickest core strip. This ratio results essentially from the assurance of a complete enclosure of the core band or the core bands by the shrouds while ensuring basically non-releasable adhesion of the shrouds.

Further features and advantages of the present invention will become apparent from the following description of preferred embodiments with reference to the accompanying drawings. Show:

1 a composite material according to the invention in a perspective view;

1a a cross section through a composite material according to the invention according to XX of 1 ;

1b a cross section through a composite material according to the invention as an example of different core band cross sections;

2 a composite material according to the invention in a perspective view as an example of more than one core band;

2a a cross section through a composite material according to the invention according to YY of 2 ;

3 a schematic representation of the production of a composite material according to the invention with an isolated Kernbandzuführung;

4 a schematic representation of the production of a composite material according to the invention with a continuous core strip supply with predetermined breaking points;

5 a schematic representation of the preparation of a composite material according to the invention with delivery of packages.

LIST OF REFERENCE NUMBERS

1

first shroud

2

second shroud

3

core band

3 '

second core band

W

rolling direction

A

Separator / Scissors

B

Breaking point

O ₁

first surface

O ₂

second surface

S ₁

first side surface

S ₂

second side surface

R ₁

first end face

R ₂

second end face

A composite material according to the invention essentially comprises a first shroud 1 , a second shroud 2 and at least one core band 3 , Preferably, the composite material has no other shrouds than the two shrouds 1 . 2 on.

The composite is made by plating, preferably roll cladding. In that sense, the shrouds are 1 . 2 and the core band 3 basically inextricably linked.

As materials for the shrouds 1 . 2 and the core band 3 come into question all materials that can be plated together. In particular, come as materials for the shrouds 1 . 2 and / or the core band 3 in principle metals, in particular all ductile metals in question. In particular, come as materials for the core band 3 basically non-amorphous metals, such as aluminum, magnesium and / or copper, and alloys thereof, as well as steel in question.

The composite material according to the invention is preferably designed as a plate or band. Accordingly, the composite material preferably has the shape of a flat cuboid.

According to the invention, it is provided that the shrouds completely surround the at least one core strip, wherein the shrouds and the at least one core strip are connected to one another by means of plating.

With this solution according to the invention, a composite material produced by plating is provided, which combines the properties of the materials used with one another and at the same time has as far as possible a homogeneous composition of materials to the outside. Finally, by selecting the material of the shroud, the outwardly directed material can be determined. In other words, the result is a composite material having on its surface homogeneous properties of a metal, that is the metal of the shrouds 1 respectively. 2 has, but still has the overall benefits of a composite material, in particular the additional, by the core band 3 introduced properties.

This can result in particular the following processing advantages:

• - Thermal joining, such as welding, without mixing the composite partners
• - Material equal brazing
• - Homogeneous look, feel
• - Avoid bimetal or edge corrosion

The figures show examples of a composite according to the invention.

In 1 is a perspective view of a composite material according to the invention shown. In 1a is a corresponding section XX through the composite according to 1 shown. It can be seen that a single core band 3 between the first shroud 1 and the second shroud 2 arranged and completely off the shrouds 1 . 2 is enclosed. The entire surface of the composite material is correspondingly covered by the shrouds 1 . 2 educated. The core band 3 is neither visible nor accessible from outside.

In 1b is a section through a composite material according to the invention shown to different cross-sectional shapes of the core band 3 display. There are basically any other forms of the core band 3 conceivable.

In 2 is a perspective view of a further embodiment of a composite material according to the invention shown. In 2a a corresponding section through the composite according to YY is shown. It can be seen that a first core band 3 and a second core band 3 ' between the first shroud 1 and the second shroud 2 are arranged, with the core bands 3 and 3 ' completely off the shrouds 1 . 2 are enclosed. Basically, you can also have more than two core bands 3 between the shrouds 1 . 2 arranged and from the shrouds 1 . 2 be enclosed.

It can be seen in all the figures that the composite material according to the invention is preferably a plate or strip, that is to say a flat composite material. Accordingly, the composite material is basically designed as a flat cuboid and has correspondingly two surfaces, that is, a first surface O ₁ and a second surface O ₂ , two side surfaces, that is, a first side surface S ₁ and a second side surface S ₂ , and two end surfaces, that is one first end face R ₁ and a second end face R ₂ , on. The surfaces O ₁ and O ₂ represent by far the largest surfaces of the composite material and are made of the free surfaces of the shrouds 1 . 2 educated. The side surfaces S ₁ , S ₂ and the end faces R ₁ , R ₂ are preferably made of edges of the shrouds 1 . 2 educated. The size of the face or side surfaces is far below the size of the surfaces. For orientation, it should preferably be assumed that the side surfaces S ₁ , S ₂ should be aligned in parallel and the end faces R ₁ , R ₂ should be aligned transversely to the rolling direction W.

Basically, the material combinations for the shrouds and core bands can be chosen freely. Preferably, the first shroud 1 and the second shroud 2 from a first material and the core band 3 or the core bands 3 . 3 ' can consist of a second material. If several core bands 3 . 3 ' can be used, the core bands can also consist of different materials. Also the shrouds 1 . 2 can basically consist of different materials. In this way, however, at least a first, with respect to the material homogeneous surface formed by the first shroud 1 and a second, with respect to the material, homogeneous surface through the second shroud 2 ,

The preparation of the composite material according to the invention can be as follows.

The composite material according to the invention is preferably a plate or strip, corresponding to a flat composite material. In the following, the manufacture of the composite material by means of roll cladding in a slab plating apparatus will be described in more detail, although the composite material may basically be produced by any plating method.

In the course of the production of the composite material according to the invention by roll-plating, the roll-plating device becomes the first shroud 1 , the second shroud 2 and that at least one core band 3 fed. The shrouds may be flat, in cross-section, for example, rectangular, elongated profiles, which can be unrolled, for example, from a corresponding coil. Also with the core band 3 it may be a flat, in cross-section, for example, rectangular, elongated profile. Here, as already mentioned above, quite different profile cross sections are conceivable.

The first shroud 1 gets on the core band 3 , as well as the second shroud 2 plated. This results in a generally insoluble composite of the aforementioned bands, which leaves the Walzplattiereinrichtung in the rolling direction W.

As a rule, the resulting plated band is cut to pieces of equal size. The severing is represented by a separating device A, for example a corresponding pair of scissors. The severing is preferably transverse to the rolling direction. The cutting does not have to inevitably be made immediately after plating or in the same plating. For example, the clad band may also be rolled up first and separated into individual pieces, for example at another location, in particular another company.

To the core band 3 or the core bands 3 . 3 ' completely through the shrouds 1 . 2 To enclose, the core band can 3 or the core bands 3 . 3 ' isolated and the shrouds 1 . 2 be continuously fed to the plating. It is also conceivable to exploit the fracture limit of the core band 3 ,

A schematic representation of the production of the composite material according to the invention by means of isolated supply of the core band 3 is for example in 3 shown. It's hinted that the shrouds 1 . 2 continuous, but only single core bands 3 predetermined length of Walzplattiereinrichtung be supplied. By cutting the plated strip at locations where there is no core band, a composite material according to the invention results, in which the core band is completely covered by the shrouds 1 . 2 is enclosed.

A comparable result can also be achieved by appropriate utilization of the breaking limits of the core band 3 , in particular by predetermined breaking points B of the core band 3 , be achieved. During plating, for example, the breaking boundaries of the core band become 3 , in particular the predetermined breaking points B, exceeded and the core band 3 Ruptures locally at those points where the fracture limits are exceeded, in particular at the predetermined breaking points B. In the rolling direction of the strip corresponding areas arise in which core band is present and in which no core band is present. By appropriate cutting at locations where there is no core band, a composite material according to the invention results, in which the core band completely from the shrouds 1 . 2 is enclosed. Such a manufacturing process is schematically in the 4 shown.

According to the schematic representation in 5 a loose composite of the shrouds and the at least one core strip is assembled as a package prior to plating and then roll-spliced the package.

It has proved to be advantageous to use a core tape which has a thickness of between 50 μm to 10 mm before plating. It has also proved to be advantageous that the thickness of the first shroud plus the thickness of the second shroud prior to plating is greater than the thickest core strip. By plating learn the shrouds 1 . 2 and core bands 3 the usual thickness changes for plating.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202012004824 U1 [0002]
• DE 102010045011 A1 [0003]
• DE 10258824 B3 [0004]

Claims (12)

Composite material, characterized in that the composite material is a first shroud ( 1 ), a second shroud ( 2 ) and at least one core band ( 3 ), wherein the shrouds ( 1 . 2 ) and the at least one core band ( 3 ) are connected to one another by means of plating, the cover bands ( 1 . 2 ) the at least one core band ( 3 ) completely enclose. Composite material according to claim 1, characterized in that the shrouds ( 1 . 2 ) consist of the same materials. Composite material according to at least one of the preceding claims, characterized in that the composite material as shrouds exclusively two shrouds ( 1 . 2 ) having. Composite material according to at least one of the preceding claims, characterized in that the composite material comprises more than one core band, wherein the core bands ( 3 . 3 ' ) consist of the same or different materials. Composite material according to at least one of the preceding claims, characterized in that the shrouds ( 1 . 2 ) and / or the at least one core band ( 3 ) made of metal, in particular a ductile metal. Composite material according to at least one of the preceding claims, characterized in that the at least one core band ( 3 ) consists of a non-amorphous metal. Method for producing a composite material according to at least one of the preceding claims by means of roll-cladding in a roll-laminating device, characterized by the following method steps: - continuous feeding of a first shroud ( 1 ) and a second shroud ( 2 ) to the roll-plating device; - occasional supply of at least one core band ( 3 ) to the roll-plating device; - plating of shrouds ( 1 . 2 ) and the at least one core band ( 3 ), in which the isolated supply of the core band ( 3 ) in the rolling direction areas with and without core band ( 3 ) arise; - Separating the plated band by separating at a place without core band. Method for producing a composite material according to at least one of the preceding claims by means of roll-cladding in a roll-laminating device, characterized by the following method steps: - continuous feeding of a first shroud ( 1 ) and a second shroud ( 2 ) to the roll-plating device; Continuous feeding of at least one core band ( 3 ) to the Walzplattiereinrichtung, in particular a core band with predetermined breaking points; - plating of shrouds ( 1 . 2 ) and the at least one core band ( 3 ), where the breaking point of the core band ( 3 ), in particular at the predetermined breaking points (B), occasionally exceeded, so that in the rolling direction areas with and without core band ( 3 ) - Separating the plated band by separating at a place without core band. Process for producing a composite material according to at least one of the preceding claims by means of roll cladding in a roll-laminating device, characterized by the following process steps: - assembling a loose composite from the first shroud ( 1 ), second shroud ( 2 ) and at least one core band ( 3 ) to a plating package; Feeding the plating package to the roll plating device; Plating the plating package in the roll plating device. Method according to at least one of the preceding claims, characterized in that the roll-plating device has more than one core strip ( 3 . 3 ' ) is supplied. Method according to at least one of the preceding claims, characterized in that the at least one core band ( 3 ) has a thickness greater than 50 μm to 10 mm before plating. Method according to at least one of the preceding claims, characterized in that the thickness of the first shroud ( 1 ) plus the thickness of the second shroud ( 2 ) before plating is greater than the thickness of the thickest core band ( 3 ).

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