Method of producing refractory metal or alloy materials
US5224534A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1991 |
| Grant date | Jul 6, 1993 |
| Priority date | — |
| Expiry date | Sep 17, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D2099/003
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
There is provided a method of producing a refractory metal or refractory metal-based alloy material by electron beam cold hearth remelting which comprises melting and casting a meltable electrode, characterized in that the electrode used for electron beam cold hearth remelting is made by enveloping a material of refractory metal or refractory metal-based alloy to be melted with an enclosure formed from a metallic material having a higher vapor pressure than said particular refractory metal or from a metallic material which includes component or components having a higher vapor pressure than said particular refractory metal. The evaporation loss of the alloy component or components of the refractory metal-based alloy is compensated for with said metallic material or component(s) of the enclosure or otherwise any metallic material or component(s) of the enclosure provides at least a partial addition of the alloy component or components of the refractory metal-based alloy. Titanium sponge or titanium scrap may be produced into a slab with a square cross section and then directly rolling the slab without subjecting the slab to forging before the rolling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.