Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Cutter body, useful for cutting plastic-, wood-, paper and carbon fiber materials, comprises a substrate body, and a thin coating lamella applied on a free surface side of the substrate body

 
: Rechberger, Marcus; Bertling, Jürgen; Paschke, Hanno

:
Frontpage ()

DE 102011014186 A: 20110316
Deutsch
Patent, Elektronische Publikation
Fraunhofer UMSICHT Oberhausen ()
Fraunhofer IST ()

Abstract
The cutter body comprises a substrate body (3), and a thin coating lamella (4) applied on a free surface side of the substrate body, where the substrate body has a lower wear resistance than the coating lamella. The coating lamella forms a cutting edge (2) having two cutting edge faces (5, 6) facing on each other at the cutting edge during cutting of a cutting product by an abrasion of the substrate body. The coating lamella comprises a nano-structured layer system with chemical composition changing over a layer thickness, and layer regions of different hardness. The cutter body comprises a substrate body (3), and a thin coating lamella (4) applied on a free surface side of the substrate body, where the substrate body has a lower wear resistance than the coating lamella. The coating lamella forms a cutting edge (2) having two cutting edge faces (5, 6) facing on each other at the cutting edge during cutting of a cutting product by an abrasion of the substrate body. The coating lamella comprises a nano-structured layer system with chemical composition changing over a layer thickness, and layer regions of different hardness, where hard-brittle layer regions and visco-elastic layer regions are alternatively arranged in the layer system. A relative mass portion of a first layer component with high hardness and/or a second layer component with low hardness in the layer system periodically alters over the layer thickness of the layer system. A gradation of the chemical composition of the layer system is provided with a continuous change over the layer thickness of the layer system of the relative mass portion of the first and/or second layer components. A maximum hardness of the hard-brittle layer region is 25-35 GPa. A maximum hardness of the visco-elastic region is 20-30 GPa. The hardness of the hard-brittle layer region starting from a maximum value in direction of adjacent visco-elastic layer regions is decreased. The hardness of the visco-elastic layer region starting from the minimum value in direction of adjacent hard-brittle layer regions is increased, where a continuous hardness transition is provided between the hard-brittle layer regions and the visco-elastic layer regions. A distance between two closest hard-brittle layer regions is 350-400 nm. The layer system is obtainable by a plasma assisted chemical vapor deposition process. The layer system is a titanium diboride-titanium nitride (TiB 2-TiN)-layer system with TiB 2as the first layer component and TiN as the second layer component. A surface layer treatment of the substrate body is provided by plasma nitriding before deposition of the layer system.

: http://publica.fraunhofer.de/dokumente/N-298118.html