Method and tool of tungsten/heavy metal alloy for hot-forging solid state copper and copper alloys
US6796162B2 · kind B2 · utility
1Cited by
7References
8Claims
0Family size
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Key dates
| Filing date | Dec 19, 2001 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Dec 19, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2999/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The tungsten/heavy metal alloy is suitable for tools such as extrusion dies and extrusion mandrels for the hot-forming of copper and copper alloys. The novel alloy consists of 80 to 89.9% by weight of tungsten, 2 to 7% by weight of chromium, and a remainder of binder metal. The use of the novel alloy primarily results in a considerably reduced formation of grooves on the surface of the forming tools.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.