Process for producing a CUCB contact material for vacuum contactors
US5241745A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1991 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | Dec 2, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49206
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
To produce CuCr contact materials, it is known to use purely powder-metallurgical, sinter impregnation and smelt-metallurgical processes. Only materials produced by smelt-metallurgical processes are suitable as contact materials for vacuum contactors based on copper-chromium. According to the invention, a contact material for vacuum contactors consisting essentially of copper (Cu) and chromium (Cr) in the proportion of 50 to 70% wt. Cu and 30 to 50% wt. Cr is manufactured by pressing and sintering a powdered mixture of the components until a closed porosity is attained and by subsequently cold working the sintered body. It has been possible to demonstrate that an intimate and faultless bonding of the components Cu and Cr is obtained by cold welding the structural constituents with this process as with smelting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.