Steel rotor shafts for electric machines
US5437742A · kind A · utility
5Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1993 |
| Grant date | Aug 1, 1995 |
| Priority date | — |
| Expiry date | Dec 2, 2013 |
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: PA1 C 0.15 to 0.3% PA1 Si <0.1% PA1 Mn <1% PA1 Ni 3 to 5% PA1 Cr >2%, <3.5% PA1 (Mo+W) 0.1 to 1.0%, W being optional PA1 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.