Abstract: A process for the industrial production of wear-resistant steel pipes having an optimized life. The process includes providing a wear-resistant, hardenable steel sheet in an unhardened or tempered state, shaping the steel sheet into a tubular preform in which two longitudinal edges of the steel sheet are positioned opposite one another with a welding gap extending between the two edges, welding the longitudinal edges by forming a welded seam which closes the welding gap, thereby forming a steel pipe, and heat treating the steel pipe. The heat treatment of the steel pipe includes heating the steel pipe at an average heating rate of 5-400 K/s to a hold temperature which is ? the Ac3 temperature of the steel and ?1100° C., holding the steel pipe at the hold temperature for 1-120 s, and cooling the steel pipe at an average cooling rate of 10-600 K/s to room temperature.

Abstract: “A method for thermally treating a flat steel product, a thermally treated flat steel product and use thereof. The method includes providing a flat steel product with a structure with a first hardness. The flat product is heated at least in sections to an austenitizing temperature. The heated flat product is cooled at least in sections so that a structure with a second hardness is formed within the flat product at least in sections, the second hardness having a higher level of hardness in comparison to the structure with the first hardness. The heating and the cooling down of the flat product are coordinated with each other such that the structure with the second hardness is formed across the thickness of the flat product and at least in one of said sections, the structure with the first hardness remains constant across the thickness of the flat product.

Abstract: The present disclosure relates to a process for producing profiles from metal, a metallic strip material being fed to a shaping-hardening device, in which the strip material is shaped into a profile and is hardened at least in certain regions, portions of the profile that are emerging continuously from the shaping-hardening device being coated with a protective layer. The disclosure also relates to an apparatus for producing profiles from metal, with a shaping-hardening device for shaping a metallic strip material that can be fed to the shaping-hardening device into a profile and for hardening the profile at least in certain regions, and with a coating device, by which portions of the profile that are emerging continuously from the shaping-hardening device can be coated with a protective layer.

Abstract: A method and a device for inductive radiofrequency welding of metal products, include heating by inducing radiofrequency currents with use of at least one induction conductor. The metal products and a welding zone are moved relative to one another, so that edge regions of the metal products to be welded are brought in contact in the welding zone and are welded together to form a weld seam. Metal products with different material thicknesses and/or material properties can be welded together because an induction conductor which heats the edge regions of the metal products is used which includes at least two mutually separable induction conductor components that are assigned to the respective metal product and are adapted thereto, and the edge regions to be welded are heated in a manner that is adjusted separately for the respective metal product.

Abstract: The invention relates to a method and a device for guiding bands to be joined to one another along their longitudinal edges, comprising guide elements which form tracks for guiding the bands that are configured such that the bands approach one another in the transport direction and the longitudinal edges thereof rest on one another at a non-overlapping contact point. At least one of the tracks may be configured to undulate with a wavelength of ¼???2, such that transverse displacement of the band guided thereon occurs. The axes of rotation and/or longitudinal central axes of the guide elements may also be inclined towards one another at different angles of inclination in relation to a horizontal plane of reference, such that the band guided on said track is rotated about its longitudinal axis in the transport direction.

Abstract: The present disclsoure relates to a process for producing profiles from metal, a metallic strip material being fed to a shaping-hardening device, in which the strip material is shaped into a profile and is hardened at least in certain regions, portions of the profile that are emerging continuously from the shaping-hardening device being coated with a protective layer. The disclosure also relates to an apparatus for producing profiles from metal, with a shaping-hardening device for shaping a metallic strip material that can be fed to the shaping-hardening device into a profile and for hardening the profile at least in certain regions, and with a coating device, by which portions of the profile that are emerging continuously from the shaping-hardening device can be coated with a protective layer.

Abstract: The invention relates to a method for welding a first composite sheet metal part comprising at least two metal sheets and a sheet arranged between both metal sheets that consists of a material with a different chemical composition than the two metal sheets, to a second sheet metal part consisting of a solid metallic material or a further composite material with at least two metal sheets and a sheet arranged between the metal sheets that consists of a material with a different chemical composition than the two metal sheets. The object of providing a method for welding composite sheet metal parts is achieved by welding the sheet metal parts using a high-frequency welding method.

Abstract: The invention relates to a method and a device for guiding bands to be joined to one another along their longitudinal edges, comprising guide elements which form tracks for guiding the bands that are configured such that the bands approach one another in the transport direction and the longitudinal edges thereof rest on one another at a non-overlapping contact point. At least one of the tracks may be configured to undulate with a wavelength of ¼???2, such that transverse displacement of the band guided thereon occurs. The axes of rotation and/or longitudinal central axes of the guide elements may also be inclined towards one another at different angles of inclination in relation to a horizontal plane of reference, such that the band guided on said track is rotated about its longitudinal axis in the transport direction.

Abstract: A device and a method for guiding bands to be joined to one another along their longitudinal edges, in which bands are guided via deflection rollers to a joining position. The device according to the invention provides that the deflection roller located closer to the joining position is configured as a conical roller, the deflection roller arranged upstream of this conical roller in the running direction of the band being also configured as a conical roller or as a deflection roller having a cylindrical lateral surface, and the conical roller last mentioned tapering in the direction of the other longitudinal edge of the band, or the rotational axis of the deflection roller having a cylindrical lateral surface spatially approaching the rotational axis of the conical roller arranged downstream in the running direction of the band on the edge side of the band opposing the longitudinal edge to be joined.

Abstract: A laser beam welding head for the welding of metal parts and method of use include at least one beam path for a welding beam and means for the optical acquisition of the position of the welding seam at a first measuring position, wherein the means for the optical acquisition of the position of the welding seam allow arrangement of the first measuring position in the welding direction running ahead of the welding position of the welding beam, and, at least as a function of a lateral deviation of the welding seam from a reference position, generate a correction signal for the correction of the welding position of the welding beam, as well as a corresponding use of the laser beam welding head.

Abstract: A method and a device for inductive radiofrequency welding of metal products, include heating by inducing radiofrequency currents with use of at least one induction conductor. The metal products and a welding zone are moved relative to one another, so that edge regions of the metal products to be welded are brought in contact in the welding zone and are welded together to form a weld seam. Metal products with different material thicknesses and/or material properties can be welded together because an induction conductor which heats the edge regions of the metal products is used which includes at least two mutually separable induction conductor components that are assigned to the respective metal product and are adapted thereto, and the edge regions to be welded are heated in a manner that is adjusted separately for the respective metal product.

Abstract: A laser beam welding head for the welding of metal parts and method of use include at least one beam path for a welding beam and means for the optical acquisition of the position of the welding seam at a first measuring position, wherein the means for the optical acquisition of the position of the welding seam allow arrangement of the first measuring position in the welding direction running ahead of the welding position of the welding beam, and, at least as a function of a lateral deviation of the welding seam from a reference position, generate a correction signal for the correction of the welding position of the welding beam, as well as a corresponding use of the laser beam welding head.