Influence of Chromium, Zirconium and Silicon on the Wear Resistance of Titanium Aluminum Nitride (TiAlN) Multilayer Films
-
H. Decho
, A. Mehner , J. Kohlscheen and H.-W. Zoch
Abstract
Titanium aluminum nitride (TiAlN) coatings are frequently used for cutting applications because of their high wear resistance and high thermal stability. Doping with additional elements and a multilayered film structure can significantly improve the wear resistance of these hard coatings. For this context, the wear resistant of TiAlN based multilayer film systems was investigated. Films with different contents of chromium, zirconium and silicon were deposited by reactive DC magnetron sputtering on cemented tungsten carbide (WC/Co) milling inserts. Doping content and layer thickness were varied by the target power. Chemical composition, microstructure, adhesion, hardness and tool life time was analyzed by glow discharge optical emission spectroscopy (GDOES), electron microscopy, scratch tests, hardness indentation tests and milling tests. An industrial TiAlN coating was used as reference for the cutting test. Milling inserts coated with TiAlN/CrXN and TiAlN/ZrN films showed no improved life time in comparison to the TiAlN reference, whereas the lifetime of the TiAlN/SiXNY coated milling inserts was enhanced significantly for silicon contents up to 1.8 at.-%. A further increase of the silicon content the resulted in a significant decrease of adhesion and cutting performance.
Kurzfassung
Titanaluminiumnitridschichten (TiAlN) werden aufgrund ihrer hohen Verschleiß- und Oxidationsbeständigkeit häufig als Beschichtungen in der Zerspanung eingesetzt. Die Verschleißbeständigkeit dieser Hartstoffschichten kann sowohl durch eine Dotierung mit zusätzlichen Elementen als auch durch einen Multilagenaufbau erheblich verbessert werden. In diesem Zusammenhang wurde die Verschleißbeständigkeit von TiAlN-basierten Mulitlagen-Schichtsystemen untersucht. Hierzu wurden Schichtsysteme mit verschiedenen Chrom-, Zirkonium- und Siliziumgehalten über reaktives DC-Magnetron-Sputtern auf WC/Co-Wendeschneidplatten abgeschieden. Der Dotierungsgehalt und die Lagendicke wurden dabei über die Targetleistung variiert. Die chemische Zusammensetzung, die Mikrostruktur, die Haftfestigkeit, die Eindringhärte und die Fräsperformance wurden durch optische Glimmentladungsspektrometrie (GDOES), Elektronenmikroskopie, Ritztests, instrumentierte Eindringprüfung und Frästests ermittelt. Als Referenz für die Frästests wurde eine industriell eingesetzte TiAlN-Beschichtung verwendet. Während die TiAlN/CrXN- und TiAlN/ZrN-beschichteten Wendeschneidplatten keine erhöhte Standzeit aufwiesen, konnte die Standzeit bei den TiAlN/SiXNY-beschichteten Wendeschneidplatten für Siliziumgehalte bis 1,8 At.-% erheblich verbessert werden. Eine weitere Erhöhung des Siliziumgehalts führte zu einer stark reduzierten Haftfestigkeit und Standzeit.
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Articles in the same Issue
- Fachbeiträge/Technical Contributions
- AWT Info / HTM
- HTM-Praxis
- HTM-Praxis
- Inhalt/Contents
- Inhalt
- Kurzfassungen/Abstracts
- Kurzfassungen
- Fachbeiträge/Technical Contributions
- High-Throughput Exploration of Evolutionary Structural Materials
- Three-Dimensional Data Storage in the Subsurface Region and Fast Read-Out Technologies for Determining the Mechanical Load History of Components
- Experiences in Heat Treatment of Heat Resistant Carburizing Bearing Steels
- Influence of Chromium, Zirconium and Silicon on the Wear Resistance of Titanium Aluminum Nitride (TiAlN) Multilayer Films
Articles in the same Issue
- Fachbeiträge/Technical Contributions
- AWT Info / HTM
- HTM-Praxis
- HTM-Praxis
- Inhalt/Contents
- Inhalt
- Kurzfassungen/Abstracts
- Kurzfassungen
- Fachbeiträge/Technical Contributions
- High-Throughput Exploration of Evolutionary Structural Materials
- Three-Dimensional Data Storage in the Subsurface Region and Fast Read-Out Technologies for Determining the Mechanical Load History of Components
- Experiences in Heat Treatment of Heat Resistant Carburizing Bearing Steels
- Influence of Chromium, Zirconium and Silicon on the Wear Resistance of Titanium Aluminum Nitride (TiAlN) Multilayer Films