Cemented carbide body with high wear resistance and extra tough

Details Cemented carbide body with high wear resistance and extra tough Cemented carbide body with high wear resistance and extra tough

1997-11-03

2000-01-18

Turner, Archene

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428334, 428469, 428472, 428698, 428701, 428702, 407119, 408 1R, C23C 1630

Patent

active

060156147

ABSTRACT:
There is provided an Al.sub.2 O.sub.3 -TiN coated cemented carbide insert intended for turning of steels and especially Ca-treated steels. The alumina layer is protected by an extra thick and multilayered coating of TiN. The TiN coating is wet blasted and, for this purpose, (Ti,Al)(C,O,N) bonded to the underlying Al.sub.2 O.sub.3 layer which preferably consists of .alpha.-Al.sub.2 O.sub.3. The extra tough behavior together with increased wear resistance can be obtained by optimizing the TiN layer thickness, structure and adhesion and wet blasting the said TiN coating. This invention is characterized by the fact that the coating layers are not missing at the cutting edge of the insert.

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