Process and usage of ceriated tungsten electrode material
US4678718A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Sep 3, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12111
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The mentioned ceriated tungsten material is a non-radioactive, hardly consumable or nonconsumable matallic electrode material, utilized in the inert gas shield arc welding, plasma welding, cutting, spray coating and smelting. It can also be used as electrodes for laser transmitting source and gas discharging light source. Moreover, the said material can be utilized to make as the cathodic filament used in film deposition by electronic beam under vacuum, etc. This invention employs the technique of powder metallurgy, by strictly controlling the processing parameters to fabricate the ceriated-tungsten material, containing 1.0-4.5%* ceric oxide. Thereby, the difficulties, that had been existed for quite a long time of its processing brittleness in forging the ceriated tungsten material over 1.0%, have now been satisfactorily overcome. FNT * ceric oxide=ceria
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.