DE2317883A1 - METHOD OF MANUFACTURING CONNECTED WIRE - Google Patents

Description

DipUng. WERNER COHAUSZ · Dipl-lng. WILHELM FLORACK - DipL-lng. RUDOLF KNAUF

4 Düsseldorf, Schumannstrasse 97

AB Garphytte Brak

S-71016 Garphytten April 9, 1973

for the production of Yerbund wire

The invention "relates to a process for the production of Yerbund wire, i.e., a metal wire composed of an inner core and an outer sheath and having heretofore unknown properties having.

Special surface properties are often used for metal wire required, which often cannot be combined with the other material properties of a wire made from a single material. For example, corrosion resistance is often required and required in sails, even in such applications to use solid stainless steel in which carbon steel because of its better mechanical properties and its lower price is preferred. This is particularly important for wire cables and springs. In addition, there is often a high Resistance to scaling is required of a wire that is used in high temperature ranges, for example in conveyors by furnaces, as a resistance element, etc. To have sufficient resistance to scaling To obtain, one often has to use ferritic stainless steels or Gr-Ni alloys in such cases are brittle and expensive. After all, in many areas of application, A high level of wear resistance is required of the wire, for example in sieve grids made of round wire or in piston rings or band saws made of flat wire. Then steel with high carbide contents must be used, and these steels have low ductility and are expensive.

There is thus a need for a wire material that consists of an inner core and an outer sheath. By appropriate choice

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of the material in the core and int dumbbell it is possible to get an optimal Combination of properties in the finished wire. Of the Jacket must then preferably be connected to a core of a wire blank or block, whereupon this Terbundrohling is formed into the finished wire using known methods such as hot and cold rolling, drawing, extrusion and the same. It is, of course, of the utmost importance that complete adhesion be achieved between the core and the cladding and this adhesion must be during the overall deformation of the wire trio can be maintained in the finished wire. This has hitherto caused difficulties which are eliminated by the method according to the invention.

The invention relates to a method for manufacturing a composite wire made of metal, and it is characterized in that a core made of a wire blank is surrounded by a tubular jacket and is connected to it by explosive bonding or clothing, whereupon the wire ring is further processed if necessary is made to get the finished wire by using known methods is being worked on.

Methods for explosively bonding various metals are known and provide gate adhesion between a wide variety of metallic materials Materials. It has proven to be useful that the core material in the finished wire is made of rolled or forged material or consists of a wire rod blank, which is produced in some other way, and that the material of the jacket consists of a seamless or welded tube, or a plate bent into a tubular shape. After the explosive compound is done, the bandage material can be in wire or rod material formed with a diameter of 5-20 mm, preferably 5-15 mm by hot rolling or in any other known Veise will. Further processing can be done by cold rolling, drawing, extrusion or otherwise.

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It is known to produce composite wires, rods and other elongated metal products by drawing which is subjected to heat treatment connects. Bs is known for example from Swedish patent specification 61 563, such products with an iron or Steel core and a copper cladding, a layer of zinc being provided as a binding agent between the cladding and the core is. However, this method is time-consuming and required a lot of equipment for drawing and heat treatment. Furthermore, the variety of materials in the core and in the cladding is largely due to their adhesive properties in relation to the Binding metal limited. For example, it is impossible to have a To connect stainless steel jacket with a core made of zinc-coated steel.

Furthermore, an explosive shape or a Bxplo si advertising connection of metals known from a number of patents, for example Swedish patents 209 189 and 333 860. From However, none of the publications is known of the explosive connection of a metallic core with a jacket, which is joined by another Processing of the intermediate product to obtain a finished wire follows.

According to the method according to the invention, the end product is obtained a wire that consists of a core and a well-adhering sheath consists of the relevant starting materials. The jacket is continuous and free of holes or tears. The finished wire can be in round wire or in flat ribbons (flat wire) with a straight edge or a variable edge radius underneath Be shaped using known methods. In the preparation of a corrosion-resistant composite wire according to the invention the jacket of the material from an austenitic stainless steel, a nickel alloy, aas titanium or a titanium alloy or another corrosion-resistant material, while the core material consists of a non-alloyed and low-alloyed carbon steel consists. When the wire for the manufacture of springs

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is to be used, the core material must expediently consist of a spring steel. Composite wires made in this way are also suitable for the production of corrosion-resistant wire cables.

In the production of a trundle wire according to the invention with a high resistance to third scaling at elevated temperatures the material of the core is preferably made of a ductile steel or another ductile alloy, while the material of the jacket made of a ferritic stainless steel, a nickel-chromium alloy or another alloy with high resistance to scaling. When producing a trundle wire with a high wear resistance the material of the jacket accordingly consists of a steel or another material with a high wear resistance .

The invention is illustrated in detail by the following example: A rolled wire blank made of 0.85 $ C carbon steel and 101 mm in diameter was attached to a tube Made of stainless steel of type 18-8 explosion-coated. The tube had an inside diameter of 107 nm and a thickness of 5 mm the connection, the composite blank was rolled on wire with a diameter of 5ψ5 mm and by using a known drawing process drawn to a diameter of 1.9 am. The material was checked in all phases from the blank to the finished wire, and the adhesion between the eem and the coat was found to be excellent.

Composite wire with a diameter of 3.8 mm was passed through continuous Austenitizing oil-hardened, cut in oil and all in one Lead bath tempered, and compression springs were made from the hardened wire. The composite wire was made into springs with fully acceptable Values for straightness, length and pitch.

The invention is above essentially with reference to FIG

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Core -and cladding materials have been described, mainly of steel and steel alloys ". It goes without saying, however, that the invention is not limited to the use of these materials only, but that other metallic materials as well can easily be used in the process according to the invention can.

Expectations

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Claims (4)

speech "Io method of making a composite metal wire, thereby
characterized in that a core from a wire blank of a
Tubular jacket surrounded and thus by explosive connection
or cladding and then optionally the composite wire blank is further processed into finished wire by known methods. 2. The method according to claim 1 for the production of corrosion-resistant composite wire, characterized in that the material of the core
consists of an unalloyed or low-alloy carbon steel and the material of the jacket consists of an ausetenitic stainless steel, a nickel alloy, titanium or titanium alloy or another corrosion-resistant material. 3. The method of claim 1 for producing composite wire with
Ignition resistance at elevated temperature, characterized in that the material of the core consists of a ductile steel or another ductile alloy and the material of the jacket consists of ferritic stainless steel, a nickel-chromium alloy or another alloy with a high resistance to scaling. 4. The method according to claim 1 for producing a composite wire
with high wear resistance, characterized in that the material of the core consists of ductile steel or another ductile alloy and the material of the jacket consists of steel or another material with high wear resistance. 5 »Method according to one of claims 1 to 4, characterized in that the composite wire blank after the explosive bonding is hot-rolled in a known manner or in a known manner into a wire
or rod with a diameter of 5-20 mm, especially 5-15 stroke
is further processed. 309843/0876