Alloys containing gamma prime phase and particles and process for forming same
US5169463A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Feb 19, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A work-strengthenable alloy which includes a gamma prime phase gamma prime particles comprising the following elements in percent by weight: ______________________________________ molybdenum 6-16 chromium 13-25 iron 0-23 nickel 10-55 carbon 0-0.05 boron 0-0.05 cobalt balance, at least 20, ______________________________________ said alloy also containing one or more elements which form gamma prime phase with nickel, PA0 the electron vacancy number, N.sub.v, of the alloy being defined by EQU N.sub.v =0.61 Ni+1.71 Co+2.66 Fe+4.66 Cr+566 Mo PA0 wherein the respective chemical symbols represent the effective atomic fractions of the respective elements present in the alloy, said value not exceeding the value EQU N.sub.v =2.82-0.017 W.sub.Fe, PA0 where W.sub.Fe is the percent by weight of iron in the alloy for those alloys containing no iron or less than 13 percent by weight iron and W.sub.Fe is 13 for the alloys containing from 13-23 percent by weight iron. The alloys are formed by a melt; and heating the alloy at a temperature of from 600.degree.-900.degree. C. for a time sufficient to form said gamma prime phase prior to strengthening said alloy by working it to achieve a reduction in …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.