| 摘要 |
The invention relates to a wire-drawing cone, whose wire running surfaces of aluminium have been electrically corroded, it being possible for the aluminium to be alloyed with other metals, so that the hard corrosion layers consist of alumina of a layer thickness of between 0.001 and 0.2 mm and the wire running surfaces (1, 2) are formed with at least one groove (for example like a wedge-shaped cord groove), with the result according to the invention that the service life of the annealing roller is extended by many times that of the prior art. <IMAGE>
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