High-carbon steel wire rod with superior drawability and method for production thereof
US6783609B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2002 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Aug 30, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/009
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high-carbon steel wire rod with superior drawability which has the chemical composition (in mass %) of C: 0.6-1.0%, Si: 0.1-1.5%, Mn: 0.3-0.9%, P: no more than 0.02%, S no more than 0.03%, N: no more than 0.005%, (optional Nb: 0.020-0.050% and V: 0.05-0.20%), with the remainder being Fe and inevitable impurities, and the structure which is characterized in that pearlite accounts for no less than 95 area % and pearlite has an average nodule diameter (P &mgr;m) no larger than 30 &mgr;m and an average lamella space (S nm) no smaller than 100 nm such that the value of F calculated by the formula below is larger than zeroF=350.3/{overscore (S)}+130.3/{overscore (P)}−51.7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.