Process for the manufacture of a metallic composite wire
AssigneeW. C. Heraeus GmbH
InventorsRichard Keilberth, David F. Lupton
Life of this patent
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Abstract
A rod made of a hard material is inserted into a pipe made of a relatively soft material, and a two-element arrangement having an intermediate size is obtained by hot-rolling and drawing. In these steps, the cross section is reduced by at least 50%. Subsequently, another pipe of the soft material is fitted onto the two-element arrangement, and the so-obtained three-element arrangement is adjusted to its final size by means of hot or cold rolling followed by cold drawing.
Claims5
Process for the manufacture of a metallic composite wire having a core made of a first material and a sheath made of a second material, said second material being softer than said first material, said process comprising the following step
- inserting a rod of said first material into a pipe of said second material to form a rod-pipe arrangement having an initial cross sectional area,
- hot rolling followed by drawing said arrangement to form a two element composite having a cross sectional area which is at least 50 percent less than said initial cross sectional area,
- inserting said two-element composite into a further pipe of said second material to form a three element composite,
- rolling said three element composite and, finally,
- cold drawing said three element composite to adjust the cross sectional area thereof to a final size wherein the wall thickness of the sheath ranges between 15% and 40% of the diameter of the composite wire.
Dependencies are inferred from the claim text.