Abstract: The invention relates to a tower of a wind power plant, having a lower part in the form of a lattice tower or truss tower with at least two corner bars, and an upper part in the form of a cross-sectionally substantially round tubular tower, wherein each particular corner bar is put together from a plurality of steel tube profiles that are connected together in the longitudinal direction. In order to achieve good transportability and easier assembly of the components of such a tower, the invention proposes a modular tower concept. According to the invention, each particular corner bar is in this case put together from at least three steel tube profiles which are provided with perforated flanges for holding screws, wherein the corner bars are connected together by cross struts and/or tension struts attached to the flanges, and wherein the steel tube profiles of each particular corner bar are spirally welded steel tube profiles.

Abstract: Longitudinal members for motor vehicles may generally include a supporting element that is releasably connectable to an energy absorption mechanism. The supporting element may typically include a joining zone that can be used to secure the supporting element to one or more chassis or drive components of the motor vehicle. The supporting element and the energy absorption mechanism may be comprised of fiber-reinforced plastic. More specifically, the supporting element may be comprised of a plurality of length portions having different fiber orientations. For example, a first length portion may have fibers oriented substantially parallel to a horizontal longitudinal plane about which the supporting element is positioned, whereas a second length portion between the first length portion and the energy absorption mechanism may have intersecting fibers oriented oblique to the horizontal longitudinal plane.

Abstract: A method for resistance welding a metallic component to a sandwich metal sheet with a thermoplastic layer disposed between two metallic cover layers may involve heating a region of the sandwich metal sheet to be welded such that the thermoplastic layer softens, displacing the thermoplastic layer from the region by compressing the cover layers, and welding the cover layers with the metallic component by means of a flow of electrical current in a first circuit via a first welding electrode disposed on a side of the sandwich metal sheet and a second welding electrode disposed on a side of the metallic component. The method for resistance welding has short cycle times, and a compact design and a process-reliable welded connection can be achieved. The method may further involve heating the region to be welded by a flow of current in a second circuit comprising the first welding electrode and an electrical conductor disposed between the first welding electrode and the sandwich metal sheet.

Abstract: Disclosed is a method for producing a composite material, wherein two or more composite components are arranged with respect to one another by casting to form a composite, so as to create a contact region essentially without a material bond between the composite components, wherein the composite components are thereafter materially bonded to one another in the contact region by means of a hot-rolling process.

Abstract: A tool may be used to shape and/or partially press harden a workpiece. In some examples, the tool may comprise a main body having a surface, as well as a heat conducting system containing a thermal medium. The heat conducting system is integrated in the tool in such a way that, for the heating of the surface, a heat radiating from a heat source is conducted by means of the heat conducting system to the surface of the main body. Further, the heat conducting system may comprise a thermal oil or a melt as the thermal medium. The surface of the main body may be configured to face the workpiece during the shaping or partial press hardening of the workpiece.

Abstract: A method for hot or warm forming a workpiece may comprise providing the workpiece to be formed, at least partially pretreating the workpiece, at least partially heating the workpiece to a target temperature, and at least partially forming and/or hardening the workpiece. Furthermore, the workpiece may be at least partially cleaned in a cleaning step between the pretreating and the heating of the workpiece. In some examples, at least partially cleaning the workpiece may involve brushing the workpiece, using a cleaning bath, or heating the workpiece with a first burner to a cleaning temperature. Further, one or more burners used to heat or clean the workpiece may be operated with a fuel gas and/or an oxygen-containing gas.

Abstract: A method which allows process-stable hot-dip coating of Ni-alloy steel flat products in a cost- and resource-effective manner, including the following steps: a) provision of a steel flat product obtained by cold- or hot-rolling; b) within 1-30 s, heating the steel flat product to a holding temperature between 700 and 1100° C., under a heating atmosphere of N2; c) holding the steel flat product at the holding temperature for a holding duration of 10-120 s under a holding atmosphere of N2; d) cooling the steel flat product from the holding temperature to a strip inlet temperature of 430-800° C.; and e) passing the steel flat product through an inlet zone, in which an inert or reducing inlet atmosphere predominates, and passing the steel flat product through a melt bath, wherein TP1>TP2>TP4.

Abstract: A composite component may comprise at least one first steel workpiece, at least one second metal workpiece, and at least one polymer disposed between the first and second workpieces. Further, a process for the production of the composite component is disclosed. One object of the present disclosure concerns a composite component that has a lower mass compared to conventional use-specific components. The at least one polymer may be in the form of a polymer layer, which may be adhesively bonded to the first steel workpiece and to the second metal workpiece over substantially a full area of the polymer layer.

Abstract: A cold-rolled and recrystallization-annealed flat steel product may include a ferritic microstructure, which possesses optimized formability and suitability for a wide variety of applications, including painting, for example. The flat steel product may include a steel comprising (in percent by weight): C: 0.0001%-0.003%, Si: 0.001%-0.025%, Mn: 0.05%-0.20%, P: 0.001%-0.015%, Al: 0.02%-0.055%, Ti: 0.01%-0.1%. The steel may further include at least one of Cr: 0.001%-0.05%, V: up to 0.005%, Mo: up to 0.015%, or N: 0.001%-0.004%, which may have the following mechanical properties: Rp0.2?180 MPa, Rm?340 MPa, A80?40%, and n value ?0.23. At least one surface may have an arithmetic mean roughness Ra of 0.8-1.6 ?m and a peak count RPc of 75/cm. The present disclosure also concerns methods for producing flat steel products.

Abstract: A multilayer flat steel product may include a multitude of mutually bonded steel alloy layers. A steel of a first steel alloy may be provided in at least one of the steel alloy layers, and a steel of a second steel alloy different than the first steel alloy may be provided in at least one of the other steel alloy layers. The steel of the first steel alloy may have high strength, and the steel of the second steel alloy may have lower strength and lower carbon content. To enable function-optimized modelling of local material properties in all directions, at least one steel of the first steel alloy and at least one steel of the second steel alloy may be present at least within one layer of the flat steel product. Further, a component, such as for a motor vehicle body, may be comprised of a corresponding flat steel product.

Abstract: With respect to ceramic filters and filter systems for continuous metal melt filtration, to be able to counter high throughputs of steel melt and also the limitations of filter capacities during continuous casting, an alternative technological approach involves the use of novel, replaceable, and/or rotatable filter bodies at positions in the distributor channel. In some cases, the replaceable and/or rotatable filter bodies may be inserted into the distributor channel for 10 seconds to 30 minutes before being replaced. The filter bodies may be configured as an open-celled foam ceramic or a honeycomb body or a spaghetti filter and serve as a filter geometry of the replaceable and/or rotatable filter bodies in the distributor channel.

Abstract: A strut linkage for a steel construction may involve a tower of a wind turbine and/or a corner post of a lattice tower. In order that high forces can be removed via the strut linkage without causing increased stress concentrations, excessive use of material, and/or an excessive structural outlay, a plate element is provided for arranging between, preferably load-bearing, steel construction components. At least one connection element, which may be connected to the plate element, may be utilized to fasten at least one strut and/or guy of the steel construction to the steel construction components via the plate element.

Abstract: The present disclosure relates to a protective apparatus that can be positioned along an underside of a motor vehicle and, in many cases, near a front or rear region of the motor vehicle. The protective apparatus may include an underbody made from fiber-reinforced plastic for protecting assemblies or components arranged above it against damage as a consequence of stone chipping or ground contact. Further, the underbody may have three-dimensionally structured regions for increasing its rigidity, and the underbody may be designed to absorb chassis and/or crash loads and may include integrated holders for movably attaching chassis links.

Abstract: A multilayer composite material may include at least one nonmetallic layer, which in some examples comprises plastic, and at least one metallic layer comprising a first metallic shape memory material. One problem with specifying multilayer composite materials and methods for producing multilayer composite materials relative to reshaping properties can be overcome by providing at least one second metallic layer and disposing the at least two metallic layers on opposite sides of the nonmetallic layer. Further disclosed are methods for producing multilayer composite materials, as well as semi-finished products produced from such multilayer composite materials. Still further disclosed are methods for producing components using such semi-finished products.

Abstract: The invention relates to a method for bending at least one edge of a composite sheet, which has at least two outer metallic layers and an inner plastic layer, in which the edge of the composite sheet is edge-bent in a first step and is bent into the finished form in at least one further method step. In addition, the invention relates to a correspondingly bent composite sheet. The object of making a method for bending a composite sheet available, in which cracks in the metallic layers of the composite sheet can be prevented and, at the same time, in which a seam can easily be provided, is achieved by using an edge-bending punch, a holding-down device and an edge-bending jaw during the edge-bending operation and by the edge-bending punch having a notch running in the bending direction below the bending edge of the edge-bending punch.

Abstract: A method for producing a flat steel product with high reflectivity, in which at least one surface has an arithmetic mean roughness Ra of less than 0.03 ?m includes providing a flat steel product, at least one surface of which has an arithmetic mean roughness Ra of less than 2.5 ?m. The flat steel product is cold rolled in a plurality of rolling passes. Also a flat steel product with high reflectivity in the finished re-rolled state on at least one of its surface has a low arithmetic mean roughness, a high gloss, and a high directed reflection. A solar concentrator is produced from such a flat steel product.

Abstract: A method and forming tool for hot forming and press hardening plate-shaped or preformed workpieces of sheet steel, wherein the workpiece is heated to a temperature above the austenitisation temperature and is then formed and quenched in a cooled forming tool having a punch and a female mold, wherein the female mold is coated in its drawing edge region with material in a material-uniting manner and/or is provided there with at least one insert part having a thermal conductivity at least 10 W/(m*K) lower than the thermal conductivity of the portion of the female mold adjacent to the drawing edge region and comes into contact with the workpiece when said workpiece is being hot formed and press hardened, the surface of the material having a transverse dimension within the range of 1.6 times to 10 times the positive radius of the female mold.

Abstract: A surface-finished steel sheet, in some examples cold-rolled thin steel sheet, includes a metallic corrosion-resistant layer that may comprise more than 40% by weight aluminum and iron. So that that corrosion-resistant layer has high formability, especially cold formability, and hence significantly improved adhesion on forming, the corrosion-resistant layer may comprises nickel, wherein nickel-containing phases are located at a transition from the corrosion-resistant layer to a base material of the steel sheet. The nickel content of the corrosion resistant layer may be in a range from 5 to 30% by weight. Further, a method for producing a surface-finished steel sheet of this kind is also disclosed. In some examples, a nickel layer may be applied to a steel sheet, preferably cold-rolled thin steel sheet in the form of flat steel product, prior to hot-dip coating the steel sheet with a liquid aluminum melt or with a liquid melt of aluminum-based alloy.

Abstract: Coating materials with minimized lubricant demand enable optimized tribological conditions in forming flat steel products and are also unobjectionable in relation to their effects on the environment. With such coating materials, steel components can be produced by forming flat steel products in forming machines. For example, a tribologically-active layer may be produced on at least one surface of a flat steel product or a forming machine used to form the flat steel product, wherein the at least one surface comes into contact with the opposing component during forming. The tribologically-active layer may be formed by coating the at least one surface with a coating material from a group consisting of aluminum sulfate, ammonium sulfate, iron sulfate, and magnesium sulfate. The flat steel product may be inserted into the forming machine to be formed into the steel component.

Abstract: The disclosure relates to a preimpregnated fibrous composite material comprising, at least, one or more plies of sheetlike textile structures in the form of wovens, meshed fabrics, knitted fabrics, braided fabrics, stitch-bonded fabrics, nonwovens or felts of organic and inorganic fibers in a polymeric matrix. A method of manufacturing a fibrous composite component part and use thereof.