Inclusion decanting process for nickel-based superalloys and other metallic materials
US5102449A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1991 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Sep 4, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S75/96
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In a method of remelting metallic materials, particularly nickel-based superalloys, in which the melting operation is carried out in a cooled copper crucible under clean vacuum conditions by means of electromagnetic inductors, the magnetic field applied to the mass of molten metal has a frequency between 50 Hz and 5.times.10.sup.6 Hz, preferably between 5.times.10.sup.3 Hz and 5.times.10.sup.5 Hz, so as to effect simultaneously electromagnetic stirring of the liquid metal and a surface concentration at the cold walls of the mass to be recast of all the non-conductive particles, especially ceramic inclusions, thereby achieving an inclusion decanting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.