C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/18 (2006.01) C22C 38/00 (2006.01) C22C 38/20 (2006.01) C22C 38/22 (2006.01) C22C 38/42 (2006.01) C22C 38/44 (2006.01)
Patent
CA 2395825
The present invention relates to a martensitic, corrosion resistant steel for rock drilling with properties 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 in a corrosion resistant steel with a mainly martensitic structure.
L'invention a trait à un acier martensitique résistant à la corrosion, utile pour le forage de roches par percussion, qui possède des propriétés réglées essentiellement en vue d'obtenir une résistance à la fatigue par corrosion ; en particulier, à un élément allongé pour forage de roches par percussion, qui comprend au moins un filetage et un canal de lavage faits en acier résistant à la corrosion à l'aide d'une structure principalement martensitique.
Linden Johan
Lundell Lars-Gunnar
Gowling Lafleur Henderson Llp
Sandvik Ab
Sandvik Intellectual Property Ab
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