Method for producing a corrosion-resistant composite wire

US5366569A · kind A · utility

Assignee

• SKET Schwermaschinenbau Magdeburg GmbH · DE

Inventors

• Volker Müller · Philippsburg, DE
• Manfred Fehn · Saalfeld, DE
• Hans Sommer · Coburg, DE
• Hans-Jurgen Grunwald · Magdeburg, DE
• Ulf Holtge · Magdeburg, DE

Key dates

• Filing date: Mar 30, 1993
• Grant date: Nov 22, 1994
• Expiry date: Mar 30, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A30/14
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The object of the invention is a corrosion-resistant composite wire with diameters <10 mm, which has a concentric, homogeneous high-grade steel coating, wherein this coating, depending on the diameter of the wire and the application, can vary 15-30% by volume, and its strength can vary, depending on the core wire used and the degree of forming, up to .ltoreq.2000 N/mm.sup.2. To produce such a composite wire, for example, a high-strength, patented and surface-pretreated steel wire is sheathed with a strip of high-grade steel. In the first forming step, the longitudinally welded high-grade steel sheath is pressed tightly onto the core wire and in subsequent drawing steps, the composite wire is drawn to the final dimensions. At least between two forming steps, there is a selective annealing treatment of the composite wire by means of a rotary arc, whereby only the high-grade steel layer is heated to the annealing temperature.