Coated cutting tool insert

Details Coated cutting tool insert Coated cutting tool insert

2006-08-29

2006-08-29

Turner, Archene (Department: 1775)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

C051S307000, C051S309000, C428S336000, C428S698000, C428S701000, C428S472000

Reexamination Certificate

active

07097901

ABSTRACT:
The present invention relates to a coated cemented carbide cutting tool insert particularly useful for turning of cast irons but also low alloyed steels at mediate to high cutting speeds. The cutting tool insert is characterised by a cemented carbide body comprising WC, cubic carbonitrides, a W-alloyed Co binder phase, a surface zone of the cemented carbide body that is binder phase enriched and nearly free of cubic carbonitride phase, and a coating including an innermost layer of TiCxNyOzwith equiaxed grains, a layer of TiCxNyOzwith columnar grains and at least one layer of Al2O3.

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