Elongated percussive rock drilling element
US6547891B2 · kind B2 · utility
66Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2001 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Feb 16, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/44
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a martensitic, corrosion resistant steel for rock drilling with properties which is adjusted essentially with regard to resistance against corrosion fatigue. This has been obtained in that an elongated element for percussive rock drilling which includes at least a thread and a flush channel has been made with corrosion resistant steel having a mainly martensitic structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.