Process for producing a multilayered metal pipe

A multilayer pipe, in particular for brake lines of motor vehicles, is proposed, and also a process for producing such pipes. The multilayer pipe is produced from flat steel strip (1) by winding or round deformation and subsequent soldering by means of a solder layer (2) applied to at least one side...

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Bibliographische Detailangaben
Hauptverfasser:	FERENCZY, NIKOLAUS, JUNKERS, DIETER
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS THEREFOR AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL JOINTS OR FITTINGS FOR PIPES LIGHTING MACHINE TOOLS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE PERFORMING OPERATIONS PIPES PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS PUNCHING METAL SOLDERING OR UNSOLDERING SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A multilayer pipe, in particular for brake lines of motor vehicles, is proposed, and also a process for producing such pipes. The multilayer pipe is produced from flat steel strip (1) by winding or round deformation and subsequent soldering by means of a solder layer (2) applied to at least one side of the steel strip (1). In order to avoid leaks and later corrosive effects as far as possible during the production of the multilayer pipe, the solder layer (2) consists of a copper alloy having a melting temperature below 1020 DEG C, preferably below 1000 DEG C. In the process for producing the multilayer pipe, the steel strip is, after electrolytic degreasing, first pretreated in a nickel flash bath or in a copper pickle. The steel strip is then coated with the copper alloy which may contain proportions of tin, zinc or silver for reducing the melting point. After the winding or round deformation has been carried out, the multilayer pipe can be coated with an additional corrosion-inhibiting layer.