Process for cladding precious metals to precipitation hardenable materials
US5370753A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1993 |
| Grant date | Dec 6, 1994 |
| Priority date | — |
| Expiry date | Aug 31, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B15/018
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for cladding precious metals to precipitation hardenable materials. In accordance with one aspect of the present invention, are the steps of (i) placing a precious metal layer of a first selected thickness atop a selected beryllium-copper alloy base metal strip of a second selected thickness to approximate a desired final product thickness, (ii) cold rolling the layer and strip to reduce their respective thicknesses by generally more than 50%, (iii) heating the layer and strip to a first selected temperature generally within a range of 1000.degree.-1300.degree. F., (iv) maintaining the first temperature for a first selected time to promote metallic bonding of the layer to the strip while softening the base metal, (v) pickling the layer and strip to remove surface oxides, (vi) cold rolling the layer and strip to a thickness generally 11% greater than that of the desired final product thickness, (vii) heating the layer and strip to a second selected temperature generally within a range of 1250.degree.-1400.degree. F., (viii) maintaining the second temperature for a second selected time to effect dissolution of the beryllium into the copper and growth of metallic grains in t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.