DE102017201834A1 - Semi-finished product with different properties - Google Patents

Abstract

The present invention relates to a semifinished product (1, 1 ', 1 ", 1'", 1 "", 1 "", 1 "" ") comprising at least one metallic layer (2, 3, 3 ', 3", 3 "') with at least one cohesively bonded layer (4) made of a fiber-polymer composite system, which has a thickness (h, H), width (B) and length (L), wherein the semifinished product (1, 1', 1", 1 "', 1" ", 1'" ", 1" "") over its thickness (h, H), width (B) and / or length (L) at least partially different properties, in particular in the single layer thickness, strength and / or stiffness.

Description

Technical area

The invention relates to a semi-finished product with different properties.

Technical background

Material composites, in particular hybrid materials with at least one metallic layer and at least one layer of a fiber-reinforced polymer for producing a component, in particular a body component for vehicles, which have the lowest possible weight and good mechanical properties, in particular a high energy absorption in the event of a crash and strength, in particular from the German patent application DE 10 2011 015 071 A1 known. These composite materials are semi-finished products with a uniform structure and uniform properties. An alignment with regard to optimum adjustment of the loading direction and load distribution in the semifinished product or in the component to be formed is comparatively low. Other generic semi-finished products are from the publications WO 2002/078951 A1 and EP 1 431 026 B1 known. With regard to the state of the art, there is further potential for improvement, in particular with regard to a stress-oriented and individual design of the semifinished product.

Summary of the invention

The invention is therefore based on the object to develop a semi-finished, which can be designed to load and individual.

This object is achieved by a semi-finished product having the features of patent claim 1.

According to a first aspect, a semifinished product is provided according to the invention, which comprises at least one metallic layer with at least one cohesively bonded layer of a fiber-polymer composite system which has a thickness, width and length, wherein the semifinished product at least over its thickness, width and / or length partially different properties, in particular in the single layer thickness, strength and / or stiffness.

With the invention, a better adaptation to the requirements in the component to be produced, in particular a load-compatible design is made possible over the region-varying properties preferably in terms of single-layer thickness, strength and / or stiffness in the semifinished, and this can also be associated with a weight reduction , Especially accompanied by material savings, for example, in reducing the single-layer thickness (s). The metallic layer is preferably single-layered or layer-formed from a metallic material. Preferably, the metallic material is a sheet of a steel alloy, in particular a carbon-steel alloy, an aluminum alloy, a magnesium alloy or a stainless steel alloy. When using a steel alloy, the sheet may be coated with a corrosion protection layer at least on one side.

The layer of a fiber-polymer composite system can be designed in one or more layers, wherein in a multilayer design at least one of the layers can also be designed fiber-free. The fiber-polymer composite system comprises a polymer matrix and fibers, in particular fibers stored in the polymer matrix. As a material for the polymer matrix in particular thermoplastics, such as. As polyamide (PA), polyethylene (PE), polyphenylsulfide (PPS), polysulfone (PSU), polypropylene (PP), polyurethane (PU) or mixtures thereof, and thermosets, such as. As epoxy resin, elastomers and thermoplastic elastomers used. In particular, carbon fibers, glass fibers, natural fibers, aramid fibers, polymer fibers, metal fibers, ceramic fibers, mineral fibers, recycled fibers or mixtures thereof can be used as the fibers. Here, the use as short fiber, long fiber and / or endless fiber is also conceivable. In particular, the fibers may be provided as roving, mat, fabric, nonwoven, tape and / or scrim.

In order to form or provide the semifinished product according to the invention, the metallic layer and the layer of the fiber-polymer composite system are bonded together in a material-locking manner, wherein the layer of the fiber-polymer composite system can preferably be arranged over the entire surface or only partially in one or more regions on the metallic layer. To increase the adhesion between the two layers, an intermediate layer in the form of an adhesion promoter between metal and fiber-polymer composite system can also be considered.

The different properties of the semifinished product according to the invention are determined in particular by the properties of the at least one metallic layer and / or the at least one layer of a fiber-polymer composite system.

According to a first embodiment of the semifinished product, the metallic layer has at least regionally varying geometric and / or mechanical properties. The metallic layer or the sheet metal can be partially have different thicknesses and / or materials, preferably be designed as a tailored product. At different thicknesses, a monolithic material as flexible rolled sheet, also called tailored rolled blank or strip, or one of two sheets of different thickness of a material, for example, similar material, such. As a steel alloy with the same composition, or of different materials, such as similar materials, eg. As steel alloys with different composition, or dissimilar materials, eg. As a steel alloy and an aluminum alloy, interconnected sheets, also called tailored "welded" blank or strip used. Also, a three-dimensionally shaped sheet, which is not flat (plan) is formed, can be used as a metallic layer. Furthermore, the sheet may also at least partially openings and / or recesses, in particular be designed as a perforated plate. The properties, such. As rigidity, strength, heat absorption and / or impact behavior of the semifinished product or the component to be produced can be selectively positively influenced.

According to a cumulative or alternative embodiment of the semifinished product, the layer of fiber-polymer composite system has at least regionally varying geometric and / or mechanical properties. The layer of fiber-polymer composite system may have regions of different thicknesses and / or materials. Different materials in the layer of the fiber-polymer composite system may vary in thickness, width and / or length side by side and / or over each other with respect to the various polymer matrix and / or fibrous materials (eg, carbon, glass, etc.). Furthermore, the types of fibers (eg, scrim, fabric, nonwoven, etc.) and / or the arrangement of the fibers (eg, atlas, twill, plain weave etc.) and / or the orientation angle of the fibers, in particular the fiber volume proportion or the fiber density vary. Cumulatively, the layer of the fiber-polymer composite system at least partially have a filler. In particular, organic and / or inorganic particles, carbon nanotubes, graphene nanoplatelets, filler spheres, hollow spheres or mixtures thereof, in particular in regions for increasing the strength, can be used as fillers. In particular, fiber-free regions may also be provided in some regions in the fiber-polymer composite system. The properties, such. As rigidity, strength and / or impact behavior of the semifinished product or the component to be produced can be selectively positively influenced cumulatively or alternatively to the varying embodiment of the metallic layer.

A layer of a thermoplastic polymer matrix based fiber-polymer composite system can be prepared in three ways. The first type relates to a continuous production process in which individual layers are formed by pressure and heat, for example in a continuous lamination process, in particular via a double belt press or lamination rolls to form a layer of a fiber-polymer composite system. Preferably, (dry) fibers are provided as an endless material and a polymer matrix in the form of one or more films and consolidated in the lamination process by means of heat and pressure to form a layer. In particular, the area-wise different properties can vary, for example, over the width of the layer to be created, for example by placing different fiber materials next to one another. For example, the properties may alternatively vary along the length of the layer to be created, for example, by alternately feeding the fibers, whereby areas in the longitudinal direction can be made fiber-free. Alternatively, prefabricated (consolidated) fiber-reinforced polymer materials, in particular in the form of organo sheets or organofilms, may be provided, wherein preferably several, different prefabricated, fiber-reinforced polymer materials are fed to the lamination process, such that a layer of a fiber-polymer composite system of thickness, width and / or length varying properties can be produced. The second type relates to a discontinuous production process in which individual layers can be formed by pressure and heat, in particular via a platen press to form a layer of a fiber-polymer composite system. Preferably, (dry) fibers are provided as blanks and a polymer matrix in the form of one or more blanks and consolidated in the lamination process by means of heat and pressure to form a layer. In particular, the area-wise different properties can vary, for example, across the width of the layer to be created, for example by placing different fiber materials next to one another or by aligning the alignment angles of the fibers differently. For example, the properties may alternatively vary along the length of the layer to be created, with areas in the longitudinal direction being able to be made fiber-free. Alternatively, prefabricated, fiber-reinforced polymer materials, in particular in the form of organo sheets or organo-foils can be provided as a blank, wherein preferably several, different prefabricated, fiber-reinforced polymer materials are fed to the lamination process, so that a layer of a fiber-polymer composite system across the thickness, width and / or length varying properties can be produced. The third type relates to a semi-continuous manufacturing process, which has the advantages of continuous production by providing continuous materials with a discontinuous lamination process, e.g. B. by a rotating plate press, united, which over a longer period compared to the continuous production process advantageously a higher pressure and heat can act on the layer to be created from a fiber-polymer composite system.

A layer of a fiber-polymer composite system based on a thermosetting polymer matrix can be prepared in an analogous manner, such as on the basis of a thermoplastic polymer matrix, but with the difference that if a subsequent forming of the semifinished product is to be ensured, hardening of the thermosetting polymer matrix (z B. resin and hardener) is prevented as much as possible during the production of the semifinished product, since a complete curing does not allow molding and thereby the semifinished product can only be used as a substantially flat material. To ensure the possibility of subsequent shaping after the production of the semifinished product, the layer of fiber-polymer composite system remains in a pre-impregnated or not fully reacted or polymerized state (Bi-Stage system) and will therefore only later in the further processing process or forms in conjunction with at least one Metallic layer in the formed semifinished product or component by z. B. cured thermal, chemical and / or photolytic activation.

According to a further embodiment of the semifinished product, the semifinished product comprises at least one further metallic layer and / or a further layer of a fiber-polymer composite system, which in particular are arranged over the entire surface or partially arranged relative to the other layers in the semifinished product and are connected to one another in a material-locking manner. Thus, in addition to a semifinished product according to the invention, which in the simplest embodiment has a metallic layer cohesively connected to a layer of a fiber-polymer composite system, different embodiments are possible, in particular as regards the structure of the layers in particular. The semifinished product preferably comprises two metallic layers with a layer of a fiber-polymer composite system arranged therebetween, which corresponds to a sandwich semifinished product. The semifinished product can also comprise more than three layers, depending on requirements and requirements of the semifinished product or the component to be produced therefrom. Thus, it is also possible to provide semi-finished products with an alternating structure (sheet-metal / fiber-polymer composite system), in particular also only one sheet as intermediate layer with fiber-polymer composite systems locally or on all sides connected on both sides of the sheet.

According to a further embodiment of the semifinished product, the metallic layer has a thickness of between 0.1 and 0.6 mm, and the layer of fiber-polymer composite system has a thickness of between 0.2 and 1.5 mm.

According to a further embodiment of the semifinished product, at least one inlay can be arranged at least partially within the fiber-polymer composite system. If the inlay preferably consists of a metallic and / or graphite-like material, the electrical conductivity within the fiber-polymer composite system can thereby be increased, whereby, for example, an area with an improved connection or connection with other parts or components can be provided, in particular for the Vehicle industry established resistance spot welding. In addition, metallic material in the shaping, depending on the polymer matrix, preferably when using a thermoplastic polymer matrix, promote the heating of the semifinished product, for. B improve the heatability. Depending on the material of the inlay, shielding and damping properties in the semi-finished product or in the component to be produced can also be improved if necessary, for example when using electrical steel. The inlay can also consist of a polymeric material. Advantageously, semifinished products with locally defined, integrated functionalities can thereby be provided.

• - bei gleicher mechanischer Performance das Gewicht reduziert werden,
• - bei gleichem Gewicht die Performance gesteigert werden,
• - die Verwendung von hochwertigen Materialien in weniger relevanten oder in nachträglich zum Verschnitt zugehörigen Bereichen reduziert werden,
• - ein zusätzliches Funktionsspektrum, wie z. B. elektrische Leitfähigkeit und/oder Heizbarkeit lokal, definiert integriert werden,
• - ökologische und ökonomische Aspekte besser berücksichtigt werden.

Compared to the semi-finished products of the prior art can advantageously by the semifinished product according to the invention

• - the weight is reduced with the same mechanical performance,
• - increase the performance at the same weight,
• - Reducing the use of high quality materials in less relevant or retrospective areas
• - An additional range of functions, such. B. electrical conductivity and / or heatability locally, be integrated, defined
• - better take into account ecological and economic aspects.

In addition, by a defined structure of the semifinished product according to the invention, the elastic and the plastic deformation behavior as well as the failure behavior in the component to be produced or produced can be based on different external mechanical and thermal loads are targeted influence.

According to a second aspect, the invention relates to a use of the semifinished product according to the invention, in particular after shaping the semifinished product into a component, as a component for vehicles, in particular for road and rail vehicles and vehicles of the aerospace industry. The component is preferably used as an axial and lateral crash-loaded structural component, in particular as a B-pillar or as a stiffness-optimized component in vehicles.

The molding of the semifinished product according to the invention into a component can be carried out by deep drawing, roll profiling, bending, folding or a combination thereof.

The joining of the semifinished product according to the invention can be carried out in different ways, preferably by means of riveting, gluing, screwing, crimping, flanging etc.

• - Flächige Bauteile in Fahrzeugen mit Anforderungen an Crashdeformationswiderstand, zum Beispiel Bodenblech, Stirnwand etc.
• - Längliche Bauteile in Fahrzeugen mit Anforderungen an Crashdeformationswiderstand, zum Beispiel Stoßfänger-Querträger, Seitenaufprallträger etc.
• - Bauteilanwendungen für Panzerung, insbesondere in Fahrzeugen als Bodenblech, als seitlich angeordnete Panzerplatten und im Dach
• - Rumpfschalen und Tragflächenelementen in Flugzeugen
• - Crashboxen für Schienenfahrzeuge, insbesondere durch Variation von metallischer Schicht und/oder Faser-Polymerverbundsystem kann gezielt das Falten im Crash gesteuert werden.

Exemplary applications and applications of the semifinished product according to the invention would be:

• - Sheet-like components in vehicles with requirements for crash deformation resistance, for example bottom plate, end wall, etc.
• - Elongated components in vehicles with requirements for crash deformation resistance, for example bumper cross members, side impact beams, etc.
• - Component applications for armor, especially in vehicles as floor pan, as laterally arranged armor plates and in the roof
• - Fuselage shells and wing elements in aircraft
• - Crash boxes for rail vehicles, in particular by varying the metallic layer and / or fiber-polymer composite system can be specifically controlled folding in a crash.

list of figures

• 1: einen schematischen Schnitt durch eine erste Ausgestaltung eines erfindungsgemäßen Halbzeugs,
• 2: einen schematischen Schnitt durch eine zweite Ausgestaltung eines erfindungsgemäßen Halbzeugs,
• 3: einen schematischen Schnitt durch eine dritte Ausgestaltung eines erfindungsgemäßen Halbzeugs,
• 4: einen schematischen Schnitt durch eine vierte Ausgestaltung eines erfindungsgemäßen Halbzeugs und
• 5: einen schematischen Schnitt durch eine fünfte Ausgestaltung eines erfindungsgemäßen Halbzeugs.

In the following the invention will be explained in more detail with reference to a drawing. Identical parts are always provided with the same reference numerals. Show it:

• 1 FIG. 1 shows a schematic section through a first embodiment of a semifinished product according to the invention, FIG.
• 2 FIG. 2: a schematic section through a second embodiment of a semifinished product according to the invention, FIG.
• 3 FIG. 2 is a schematic section through a third embodiment of a semifinished product according to the invention, FIG.
• 4 a schematic section through a fourth embodiment of a semifinished product according to the invention and
• 5 FIG. 2: a schematic section through a fifth embodiment of a semifinished product according to the invention. FIG.

Description of the preferred embodiment

In 1 is a schematic section through a first embodiment of a semifinished product according to the invention ( 1 ). The semifinished product ( 1 ) comprises a first metallic layer ( 2 ) in the form of a metal sheet, preferably a steel sheet having a thickness ( d ) between 0.1 to 0.6 mm and a second metallic layer ( 3 ), preferably a monolithic material made of a flexibly rolled sheet, which has different thicknesses ( d . D ) having. Between the two sheets ( 2 . 3 ) is a fiber-polymer composite system ( 4 ), which for example consists of a thermoplastic matrix, preferably a blend of PA-PE, with a fiber material made of carbon or glass, which in the complete layer in particular a fiber content ( 4.1 ) between 20 and 40% by volume, based on the layer (total volume) of the fiber-polymer composite system ( 4 ). The semifinished product ( 1 ) has a length (L), a width (B) and a thickness ( H ), wherein the thickness ( H ) of the semifinished product ( 1 ) is substantially constant, so that by the larger area thickness ( D ) of the sheet ( 3 ) while reducing the thickness (single layer thickness) of the layer ( 4 ) in this area a higher stiffness and / or strength in the semifinished product ( 1 ) can be set locally, defined.

In 2 is a schematic section through a second embodiment of a semifinished product according to the invention ( 1' ). The semifinished product ( 1' ) comprises a first metallic layer ( 2 ) in the form of a metal sheet, preferably a steel sheet having a thickness ( d ) between 0.1 to 0.6 mm and a second metallic layer ( 3. ' ) in the form of a metal sheet, the metal sheets ( 2 . 3. ' ) may be formed of the same material or may consist of different materials, in particular of a steel, aluminum or magnesium alloy. Between the two sheets ( 2 . 3. ' ) is a fiber-polymer composite system ( 4 ), which consists, for example, of a thermosetting matrix, preferably an epoxy resin, with a fiber material of glass or carbon, in particular different regions in the layer (FIG. 4 ) with different fiber proportions ( 4.1 . 4.2 ), for example in at least one area a proportion of fiber ( 4.1 ) between 20 and 40% by volume and in at least one further area a proportion of fiber ( 4.2 )> 40% by volume, based on the layer (total volume) of the fiber-polymer composite system ( 4 ) is provided. The semifinished product ( 1' ) has a length (L), a width (B) and a thickness ( H ), whereby due to the regionally different fiber fractions ( 4.1 . 4.2 ) within the layer ( 4 ) in particular along the length (L) of the semifinished product ( 1' ) different properties can be set locally, defined. If the semifinished product ( 1' ) is still fed to a forms to a three-dimensional component, it is important to ensure that the thermoset matrix is not yet (fully) cured, but the curing takes place only in the course of molding or subsequently.

In 3 is a schematic section through a third embodiment of a semifinished product according to the invention ( 1" ). The semifinished product ( 1" ) comprises a first metallic layer ( 2 ) in the form of a metal sheet, preferably a steel sheet having a thickness ( d ) between 0.1 to 0.6 mm and a second metallic layer ( 3 ) in the form of a three-dimensionally shaped metal sheet, preferably a steel sheet having a constant thickness ( d ). Between the two sheets ( 2 . 3 ' ) is a fiber-polymer composite system ( 4 ), which, for example, a thermoplastic matrix, preferably a blend of PA-PE, with a fiber material made of carbon, which in the complete layer, in particular a fiber content ( 4.1 ) between 20 and 40% by volume, based on the layer (total volume) of the fiber-polymer composite system ( 4 ). The semifinished product ( 1 ) has a length (L), a width (B) and different thicknesses ( H . H ) in particular along the length (L). Due to the different thicknesses ( H . H ) Different properties can be set locally, defined.

In 4 3 shows a schematic section through a fourth embodiment of a semifinished product (1 ''') according to the invention The semifinished product (1''') comprises a first metallic layer ( 2 ) in the form of a metal sheet, preferably a steel sheet having a thickness ( d ) between 0.1 to 0.6 mm and a second metallic layer (3 "'), which consists of two sheets (3"', 1, 3 "', 2), which are connected by a joint (3"', 3). are formed as tailored "welded" blank, is formed. Suitable materials for the sheets are similar or dissimilar materials, for example both sheets (3 '', 1, 3 '', 2) consist of steel alloys with different compositions or for weight reduction, in particular of a steel alloy (3 '' an aluminum alloy (3 "'. 2), which are preferably connected to each other by means of a friction stir. In addition to an aluminum alloy, a magnesium alloy having a lower density compared with a steel alloy may be used to provide a low weight semi-finished product. Between the two sheets ( 2 , 3 "') is a fiber-polymer composite system ( 4 ), which, for example, of a thermosetting matrix, preferably an epoxy resin, with a fiber material of a combination of natural fibers and mineral fibers, in particular a fiber content ( 4.1 ) between 20 and 40% by volume, based on the layer (total volume) of the fiber-polymer composite system ( 4 ) is provided in the complete layer exists. The semi-finished product (1 '") has a length (L), a width (B) and a thickness ( H ), wherein by the tailored "welded" blank of the second metal layer (3 "'), in particular along the length (L) of the semifinished product (1'"), different properties can be set locally, defined. If the semifinished product (1 '") is still supplied to a mold to form a three-dimensional component, it must be ensured that the thermoset matrix is not yet (fully) cured, but the curing takes place only in the course of molding or subsequently.

In 5 is a schematic section through a fifth embodiment of a semifinished product (1 "") according to the invention. The semifinished product (1 "") comprises a first metallic layer ( 2 ) in the form of a metal sheet, preferably a steel sheet having a thickness ( d ) between 0.1 to 0.6 mm and a second metallic layer ( 3. ' ) in the form of a metal sheet, the metal sheets ( 2 . 3. ' ) are formed of a material or may consist of different materials, in particular of a steel, aluminum or magnesium alloy. Between the two sheets ( 2 . 3. ' ) is a fiber-polymer composite system ( 4 ), which consists for example of a thermoplastic matrix, preferably a polypropylene with different fiber materials, wherein in particular different regions in the layer (FIG. 4 ) with different fiber proportions ( 4.1 . 4.3 ), for example in at least one area a proportion of fiber ( 4.1 ) between 20 and 40% by volume with a glass fiber and in at least one further region a proportion of fiber ( 4.3 ) <20 vol .-% with a carbon fiber based on the layer (total volume) of the fiber-polymer composite system ( 4 ) is provided. Not shown, the second region may also have a fiber content ( 4.3 ) equal 0, so that this region can be fiber-free. Furthermore, the semi-finished product (1 "") comprises at least one inlay ( 5 ), which at least partially within the fiber-polymer composite system ( 4 ) is arranged. The semi-finished product (1 "") has a length (L), a width (B) and a thickness ( H ), whereby through the inlay ( 5 ) within the layer ( 4 ) in this area, especially if the inlay ( 5 ) consists of an electrical sheet, the shielding and damping properties in the semifinished product (1 "") or in the component to be produced locally, with an integrated functionality can be improved. Furthermore, the inlay ( 5 ) also a layer consisting of one include unreinforced thermoplastic and serve for the local modification of stiffness, strength properties and acoustic properties.

In 6 is the semi-finished product (1 ""') according to the invention shown in its simplest form, namely comprising a metallic layer ( 2 ) in the form of a metal sheet having a thickness ( d ) between 0.1 to 0.6 mm and a fiber-polymer composite system ( 4 ), which consists, for example, of a thermosetting matrix, preferably an epoxy resin, with a fiber material of glass or carbon, in particular different regions in the layer ( 4 ) with different fiber proportions ( 4.1 . 4.2 ), for example in at least one area a proportion of fiber ( 4.1 ) between 20 and 40 vol .-% and in at least one other area a fiber content ( 4.2 )> 40% by volume, based on the layer (total volume) of the fiber-polymer composite system ( 4 ) is provided. The semifinished product (1 ""') has a length (L), a width (B) and a thickness ( H ), whereby due to the regionally different fiber fractions ( 4.1 . 4.2 ) within the layer ( 4 ) in particular along the length (L) of the semifinished product ( 1' ) different properties can be set locally, defined. Not shown here, alternatively, the layer of the fiber-polymer composite system may be formed homogeneously and the metallic layer may have different properties, for example, be designed as a tailored product.

In 7 the semifinished product (1 """) according to the invention comprises a metallic layer ( 2 ) in the form of a metal sheet having a thickness ( d ) between 0.1 to 0.6 mm, which is between two fiber-polymer composite system layers ( 4 ) is arranged. The layers ( 4 ) consist for example of a thermoplastic matrix, preferably a polypropylene with a fiber material made of glass or carbon, wherein in particular different areas in the layers ( 4 ) with different fiber proportions ( 4.1 . 4.2 ), for example in at least one area a proportion of fiber ( 4.1 ) between 20 and 40 vol .-% and in at least one other area a fiber content ( 4.2 )> 40% by volume, based on the layer (total volume) of the fiber-polymer composite system ( 4 ) are provided. The semifinished product (1 """) has a length (L), a width (B) and a thickness ( H ), whereby due to the regionally different fiber fractions ( 4.1 . 4.2 ) within the layers ( 4 ) in particular along the length (L) of the semifinished product ( 1' ) different properties can be set locally, defined. Not shown here, alternatively, one or both layers of the fiber-polymer composite system may be formed homogeneously or consist of different matrix systems, and / or the metallic layer may have different properties, for example, the metallic layer may be formed of a tailored product.

The invention is not limited to the embodiments shown in the drawing, in particular the number of layers is not limited to three. In particular, even further layers of fiber-polymer composite systems and metallic layers can be provided. Other materials in terms of fibers and matrix are useful. Furthermore, the sheets ( 2 . 3. ' . 3 ' , 3 "'), if they are made of a steel alloy, with a corrosion protection layer, preferably zinc-based, be coated at least on one side, in particular for increasing the adhesion between the metallic layer and the layer of fiber-polymer composite system ( 4 ) can the sheet ( 2 . 3. ' . 3 ' , 3 "') at least on one side of the layer ( 4 ) facing side may be coated with a primer.

LIST OF REFERENCE NUMBERS

1, 1 ', 1 ", 1'", 1 ""

Workpiece

2

first metallic layer, sheet metal

3, 3 ', 3 ", 3"'

second metallic layer, sheet metal

3 "'1, 3"' 2

Sheets of different composition / materials

. 3 ' "3

Retaining compound

4

Fiber-polymer composite system

4.1, 4.2, 4.3

Areas with different fiber content

5

inlay

d, D

Thickness of the metallic layer

h, H

Thickness of the semifinished product

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 102011015071 A1 [0002]
• WO 2002/078951 A1 [0002]
• EP 1431026 B1 [0002]

Claims (10)

Semi-finished product (1, 1 ', 1 ", 1"', 1 "", 1 ""', 1 """) comprising at least one metallic layer (2, 3, 3', 3", 3 "') with at least a cohesively bonded layer of a fiber-polymer composite system (4), which has a thickness (h, H), width (B) and length (L), characterized in that the semifinished product (1, 1 ', 1 ", 1"', 1 "", 1'"", 1 """) has different thicknesses (D), width (B) and / or length (L) at least in some areas, in particular in the single layer thickness, strength and / or rigidity , Semi-finished product Claim 1 , characterized in that the metallic layer (3, 3 ", 3"') has at least partially varying geometric and / or mechanical properties. Semifinished product according to one of the preceding claims, characterized in that the layer (4) of fiber-polymer composite system has at least partially varying geometric and / or mechanical properties. Semifinished product according to one of the preceding claims, characterized in that the semifinished product (1, 1 ', 1 ", 1'", 1 "", 1 """) at least one further metallic layer and / or a further layer of a fiber Polymer composite system includes, in particular, the entire surface or partially arranged to the other layers are present in the semifinished product and are materially interconnected. Semifinished product according to one of the preceding claims, characterized in that the metallic layer (2, 3 ', 3 ", 3"') has a thickness of between 0.1 and 0.6 mm and the layer (4) of fiber-polymer composite system has a thickness between 0.2 and 1.5 mm. Semifinished product according to one of the preceding claims, characterized in that at least one inlay (5) is at least partially disposed within the fiber-polymer composite system (4), which consists of a metallic, a graphite-like and / or a polymeric material. Semifinished product according to one of the preceding claims, characterized in that the semifinished product (1 ""') has a metallic layer (2) with a cohesively bonded layer of a fiber-polymer composite system (4). Semi-finished product after one of Claims 1 to 6 , characterized in that the semifinished product (1 """) comprises a metallic layer (2), which is arranged between two layers (4) made of a fiber-polymer composite system. Semifinished product according to one of the preceding claims, characterized in that the layer (4) of the fiber-polymer composite system at least partially has a filler. Use of the semifinished product (1, 1 ', 1 ", 1'", 1 "", 1 '"", 1 "" ") according to one of the preceding claims, in particular after molding of the semifinished product (1, 1', 1"). , 1 '", 1" ", 1" "', 1" "") to a component, as a component for vehicles, in particular for road and rail vehicles and vehicles of the aerospace industry.

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