Self-sharpening cutting tool with hard coating

Details Self-sharpening cutting tool with hard coating Self-sharpening cutting tool with hard coating

B - Operations, Transporting

26

B

B26B 9/00 (2006.01) B23B 27/14 (2006.01) B23P 15/28 (2006.01) B23P 15/40 (2006.01) B26B 21/60 (2006.01) C23C 16/04 (2006.01) C23C 16/32 (2006.01) C23C 30/00 (2006.01)

Patent

CA 2480590

There is disclosed a cutting tool having a blade coated on one side with a hard coating having a laminar or layered microstructure. The coating tends to wear evenly and smoothly, thereby keeping a cutting edge of the cutting tool smooth. Furthermore, by coating the cutting edge on one side only, the cutting edge becomes self-sharpening. The coating preferably includes at least one layer made of tungsten carbides substantially or entirely free of metallic tungsten.

La présente invention a trait à un outil de coupe comprenant une lame revêtue d'un côté avec un revêtement durci présentant une microstructure lamellaire ou en couches. Le revêtement tend à s'user de manière uniforme et de manière régulière, maintenant ainsi le tranchant de l'outil de coupe lisse. En outre, grâce au revêtement du tranchant d'un côté seulement, le tranchant devient auto-aiguisant. Le revêtement comprend, de préférence, au moins une couche réalisée en carbures de tungstène sensiblement ou entièrement exempts de tungstène métallique.

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