Diamond coated cutting member and method of making the same

Details Diamond coated cutting member and method of making the same Diamond coated cutting member and method of making the same

B - Operations, Transporting

23

B

B23B 27/14 (2006.01) B23B 51/02 (2006.01) C23C 16/02 (2006.01) C23C 16/26 (2006.01) C23C 16/27 (2006.01)

Patent

CA 2252838

A diamond coated elongate rotary cutting member and method of making the same. The cutting member (40) includes an axially forward cutting surface (42), a flute (50) and a fluted land (52). The cutting member comprises a substrate with hard grains bonded together with a metallic binder. The substrate has a first substrate region that presents an irregular surface so as to define the axially forward cutting surface (24, 26, 28) and the fluted land (52). The first substrate region contains relatively large hard grains near the surface thereof that are larger in size than the hard grains in the interior of the substrate. A diamond coating is on the surface of the first substrate region. The substrate has a second substrate region that defines the flute.

Elément de coupe rotatif allongé revêtu de diamant et procédé de fabrication associé. L'élément de coupe (40) comprend une surface de coupe axialement antérieure (42), une goujure (50) et une face de dépouille goujurée (52). Il comprend un substrat contenant des grains durs reliés les uns aux autres par un liant métallique. Le substrat comporte une première zone qui présente une surface irrégulière définissant la surface de coupe axialement antérieure (24, 26, 28) et la face de dépouille (52). La première zone du substrat contient à proximité de sa surface des grains durs relativement grands, dont la taille est supérieure à celle des grains durs situés à l'intérieur du substrat. Une couche de diamant recouvre la surface de la première zone du substrat. Ce dernier comporte une seconde zone qui définit la goujure.

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