Characterization of functionally graded TiCN and TiBCN coating of cutting tools

Authors : Cem ERTEK, Ayşegül AKDOĞAN EKER

Pages : 376-384

View : 34 | Download : 8

Publication Date : 2013-09-01

Article Type : Research Paper

Abstract :Shortening the processing time and increasing the efficiency have been a need in machining at all times. In addition to continuous developments in materials of cutting tools provided by the search every passing day, coating the surfaces of the existing cutting tools has been evaluated as more economical and more efficient solution.Studies deal with coating of cutting tools was started in the 1970s and coated tools were recognized as an important development in machining. Titanium carbide insert ignore into journalissuearticles values(TiC);, titanium nitride insert ignore into journalissuearticles values(TiN);, titanium carbonitride insert ignore into journalissuearticles values(TiCN);, cubic boron nitride insert ignore into journalissuearticles values(CBN);, chromium nitride insert ignore into journalissuearticles values(CrN); and aluminum oxide insert ignore into journalissuearticles values(Al2O3); are among the most widely used coating materials. Coating studies focused on especially high-speed steel and sintered carbide cutting tools as they have wide application area. In traditional coatings, are coated in the form of layers. As a result of occurring high temperatures during metal cutting, the different thermal expansions take place between the layers. Different expansions cause micro-cracks and this reduces the coating life. As a result of efforts to prevent the formation of these cracks, functional graded coatings insert ignore into journalissuearticles values(FGC); has been developed. In the study, high speed steel substrate material was coated as functionally graded with titanium carbonitride insert ignore into journalissuearticles values(TiCN); and titanium-boron carbonitride insert ignore into journalissuearticles values(TiBCN); coating materials. Coatings were made by magnetic sputtering method. Scanning electron microscope insert ignore into journalissuearticles values(SEM); images were taken and linear analyses, were realized for characterization of the coatings.
Keywords : High speed steel, titanium carbonitride, titanium boron carbonitride, magnetic sputtering, functionally graded coating

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