Abstract
A method for producing a composite material, particularly a steel composite material, may involve providing a first workpiece and a second workpiece, producing a bonded connection between said first and said second workpiece in order to form a provisional composite, and rolling said provisional composite in order to form the composite material. During the rolling, the bonded connection may be at least partially released, in the form of a predetermined breaking point. The rolling may be performed as hot rolling. Further, the method may involve substantially hermetically sealing the provisional composite by way of a sealant. The first and second work pieces, moreover, may be peripherally connected by way of the bonded connection along an edge area of a contact surface formed by the first and second work pieces.
Claims
1.-10. (canceled)
11. A procedure for producing a composite material, the procedure comprising: providing a first work piece and a second work piece; producing a bonded connection between the first and second work pieces to form a provisional composite; and rolling the provisional composite to form the composite material, wherein during the rolling the bonded connection is at least partially released in the form of a predetermined breaking point.
12. The procedure of claim 11 wherein the rolling is hot rolling.
13. The procedure of claim 11 further comprising substantially hermetically sealing the provisional composite by way of a sealant.
14. The procedure of claim 11 further comprising arranging the first and second work pieces relative to one another to form a contact surface.
15. The procedure of claim 14 further comprising peripherally connecting the first and second work pieces by way of the bonded connection along an edge area of the contact surface.
16. The procedure of claim 15 wherein the first and second work pieces are peripherally connected by welding.
17. The procedure of claim 11 further comprising spatially modulating a load capacity of the bonded connection to realize the predetermined breaking point.
18. The procedure of claim 11 comprising using a connecting material to produce the bonded connection.
19. The procedure of claim 18 comprising applying the connecting material for producing the bonded connection at least partially in multiple layers.
20. The procedure of claim 19 further comprising modulating a load capacity of the bonded connection by way of a number of layers of the connecting material along the bonded connection.
21. The procedure of claim 11 further comprising at least partially cleaning at least one of the first work piece or the second work piece before producing the bonded connection.
22. A provisional composite of a first work piece and a second work piece for producing a composite material, wherein the provisional composite comprises a bonded connection that is a predetermined breaking point.
23. The provisional composite of claim 22 further comprising a sealant for hermetically sealing.
24. The provisional composite of claim 23 wherein the bonded connection is disposed at an edge area of a contact surface formed by the first and second work pieces.
25. The provisional composite of claim 24 further comprising a plurality of layers of connecting material disposed along the bonded connection.
26. The provisional composite of claim 25 wherein the bonded connection is one of a plurality of bonded connections between the first and second work pieces that are configured as predetermined breaking points.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1 shows a provisional composite between a first and a second workpiece according to the prior art (top) and according to an exemplary embodiment of the present invention (bottom) in a direct comparison.
[0025] FIG. 2 shows an exemplary bonded connection for a provisional composite according to the exemplary embodiment of the present invention.
CONFIGURATIONS OF THE INVENTION
[0026] In the various figures, the same parts are always provided with the same reference symbols and are therefore generally also respectively named or mentioned only once.
[0027] FIG. 1 shows a direct comparison of a provisional composite of a first workpiece 1 and a second workpiece 2 according to the prior art and according to an exemplary embodiment of the present invention. Such a provisional composite 5 is preferably processed further by a rolling process, particularly a hot-rolling process, to form a composite material, particularly a steel composite material, wherein by the use of different materials for the first work piece 1 and the second work piece 2, the material properties for the composite material are deliberately adjusted. To form the provisional composite 5, a first work piece 1, for example in the form of a slab or a sheet bar, and a second work piece 2, for example in the form of another slab or another sheet bar, are placed next to each other along a common contact surface. The first work piece 1 and the second work piece 2 are preferably substantially congruently placed one above the other, for example to form a multi-layer slab packet. To this end, the first work piece 1 and the second work piece 2 are preferably designed or dimensioned equally in shape and size at least along one lateral surface. It is furthermore provided that the first work piece 1 and the second work piece 2 are cleaned, particularly blasted, before they are placed next to each other, at least along the lateral surfaces, via which the first work piece 1 and the second work piece 2 make contact with each other in the provisional composite 5. It is of decisive importance for the quality of the produced composite material that no air, which facilitates or causes a formation of cinder, comes in between the first work piece 1 and the second work piece 2. For this reason, the prior art provides that the first work piece 1 and the second work piece 2 are welded together peripherally so that no air can enter an intermediate space between the first work piece 1 and the second work piece 2. Such a welded joint additionally ensures that the first work piece 1 and the second work piece 2 are held together when they are transported to the hot-rolling process, i.e. to a device provided for the hot-rolling process. In the configuration shown, a first work piece 1, a second work piece 2, and a third work piece 3 are connected with one another in a slab packet, wherein a bonded connection between the first and the second work piece 1 and 2 as well as between the second work piece 2 and the third work piece 3 is respectively provided. However, the complete welded joint within the meaning of the prior art has the disadvantage that potentially trapped air can result in a formation of bubbles in the composite material. In order to prevent this formation of bubbles, the exemplary configuration of the invention provides that a bonded connection 10 is produced, which is designed such that the bonded connection 10 within the meaning of a predetermined breaking point is at least partially released during the rolling process, particularly the hot-rolling process. By releasing the bonded connection 10, trapped air can be pressed out of the opened predetermined breaking point again during the rolling process and a substantially bubble-free and thus high-quality composite material can be realized. For this purpose, it is particularly intended that the bonded connection is configured such that a load capacity, particularly a tensile strength, of the bonded connection 10 is modulated along the bonded connection 10. This means the bonded connection 10 comprises an area with a first load capacity 11 and an area with a second load capacity 12, wherein the first load capacity 11 is different from the second load capacity 12. For example, the area with the first load capacity 11 yields at lower shear or tensile forces compared to the area with the second load capacity 12 and forms the predetermined breaking point as a result. In the exemplary configuration shown, the bonded connection 10 additionally comprises an area with a third load capacity 13. In order to adjust the load capacity, the bonded connection 10 is, for example, modulated in multiple layers or in its thickness. It is furthermore conceivable that the provisional composite 5 comprises areas without bonded connection 10 and that these areas are sealed using a sealant, particularly a heat-resistant sealant, in order to hermetically seal the provisional composite 5. A paste, a black wash, and/or a lacquer are, for example, arranged in the area without bonded connection 10.
[0028] FIG. 2 shows an exemplary bonded connection 10 for a provisional composite 5 according to the exemplary embodiment of the present invention. In this case, it is preferably provided that the bonded connection 10 is realized between the first work piece 1 and the second work piece 2 as a welded joint, for example by forming welding beads. It is furthermore conceivable that in a joined state, the first work piece 1 and the second work piece 2 provide a receptacle 6 for a connecting material, for example by notches or edge contours in the first work piece 1 and in the second work piece 2 forming in the joined state the receptacle 6. It is preferably provided that the bonded connection 10 is designed in multiple layers, for example in the form of several welding beads lying one above the other, i.e. a connecting material, for example a welding material, is applied in several layers. In order to modulate the load capacity along the bonded connection, particularly the welded joint, preferably the number of the bonded connections lying one above the other or the number of layers of the connecting materials is varied, preferably periodically modulated. In a first example for the bonded connection, a first layer 31 and a second layer 32 of the connecting material are arranged completely peripherally along the contact surface between the first work piece 1 and the second work piece 2 and partially covered by a third layer 33 of the connecting material. In a second example, the first layer 31 of the connecting material is arranged completely peripherally along the contact surface between the first work piece 1 and the second work piece 2 and partially covered by the second layer 32 and/or the third layer 33 of the connecting material. In a third example, the first layer 31, the second layer 32, and/or the third layer 33 of the connecting material are respectively arranged partially along the contact surface between the first and the second work piece. Any areas without connection 10 along the periphery extending along the edge of the contact surface are preferably sealed using the heat-resistant sealant.
LIST OF REFERENCE SYMBOLS
[0029] 1 First work piece [0030] 2 Second work piece [0031] 3 Third work piece [0032] 5 Provisional composite [0033] 6 Receptacle [0034] 10 Bonded connection [0035] 11 First load capacity [0036] 12 Second load capacity [0037] 13 Third load capacity [0038] 31 First layer [0039] 32 Second layer [0040] 33 Third layer
