Steel rotor shafts of electric machines
US5548174A · kind A · utility
11Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1995 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Feb 15, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/44
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
New low-alloy steel compositions and rotor shafts for electric machines made from them are described. High nickel and chromium contents ensure high strength and toughness, while other components, notably silicon and other impurities, are kept low with the result that magnetic properties remain good. One aspect provides a steel with the following proportions by weight: ______________________________________ C 0.15 to 0.3% Si <0.1% Mn <1% Ni 3 to 5% Cr >2%, <3.5% (Mo + W) 0.1 to 1.0%, W being optional V 0.03 to 0.35%, ______________________________________ and the remainder substantially Fe. Other aspects are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.