Fine ferrite-based structure steel production method
US6572716B2 · kind B2 · utility
1Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1998 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Sep 21, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A fine ferrite-based steel is disclosed, wherein at least 60% of the ferrite grain boundary is a large angle grain boundary of at least 15°, and the mean ferrite grain size is not more than 2.5 &mgr;m. The fine ferrite-based steel of the invention has a high strength and a long fatigue life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.