CRN coated die-casting tools for casting low aluminum iron alloys and method of making same
US5476134A · kind A · utility
6Cited by
9References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 21, 1993 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Dec 21, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C14/0641
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Steel tooling for die-casting low iron content aluminum alloys is surface treated with a layer of CrN applied to a thickness of at least 4 microns, and preferably 5-10 microns, by physical vapor deposition (PVD), and preferably a steered are evaporation PVD process. The CrN protects the steel tooling from dissolution and erosion by the highly active molten aluminum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.