Steel cold work tool, its use and manufacturing
US6837945B1 · kind B1 · utility
2Cited by
2References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2000 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Apr 28, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/003
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention concerns a steel article, which consists of an alloy having a chemical composition, which contains in weight-%: 1.2 to 2.5 C; 0.8 to 2.0 Si, which partly can be replaced by aluminium, which may exist in an amount of max 1.0%; 0.1 to 1.5 Mn; 0.5 to 1.5 Cr; 1.2 to 5.0 (V+Nb/2), however max 1.0 Nb; balance iron and impurities in normal amounts, and having a microstructure which contains 4 to 12 volume-% of MC-carbides. The steel article can be used for manufacturing of cold-work tools, particularly pilger rolls for cold rolling of tubes. The invention also relates to a method of manufacturing the article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.