As-cast, age-hardened Cu-Sn-Ni worm gearing and method of making same
US5230757A · kind A · utility
2Cited by
9References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 30, 1991 |
| Grant date | Jul 27, 1993 |
| Priority date | — |
| Expiry date | Oct 30, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Worm gearing having improved wear and strength properties comprises a Cu, 8.0-13.0 w/o Sn, 3.5-5.0 w/o Ni alloy aged in the as-cast condition to strengthen the dendritic microstructural constituent (e.g., alpha phase) while retaining the as-cast, relatively hard interdendritic constituents. The overall Ni concentration of the alloy does not exceed about 5 w/o and the Ni concentration across individual as-cast dendrites is decreased at the dendrite edges (grain boundaries) to hinder formation of a discontinuous, embrittling grain boundary product that is deleterious to these properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.