Interstitial free steels and method thereof
US5200005A · kind A · utility
5Cited by
3References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1991 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Feb 8, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The strength of interstitial free steels is increased by up to 100% and the ductile to brittle transition temperature is decreased by up to 100.degree. C. by warm finish rolling in the single phase ferrite region below A.sub.rl to effect ferrite dynamic recrystallization of the steel microstructure to a ferrite structure of grain size having a grain size of up to 5 .mu.m, and especially an ultra fine grain size of 1 to 2 .mu.m; the method may be employed in various hot working methods including strip and rod mills, planetary hot rolling and extrusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.