Iron-nickel superalloy of the type in 706
US5863494A · kind A · utility
14Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1996 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Sep 5, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C19/058
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An iron-nickel superalloy of the type IN 706 has an addition of 0.02 to 0.3 percent by weight of boron and/or 0.05 to 1.5 percent by weight of hafnium. By means of this addition, a virtual doubling of the ductility is achieved as compared with an addition-free iron-nickel superalloy of the type IN 706, while the hot strength is reduced only slightly. The alloy is particularly suitable as a material for rotors of large gas turbines. It has a sufficiently high hot strength. When locally acting temperature gradients arise unwanted stresses can occur to only a slight extent because of the high ductility of the alloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.