Oxidation Behavior and Cutting Performance between Ti0.75-Al0.25-N and Ti0.69-Al0.23-Si0.08-N Coated Tool through Measurement of Cutting Temperature

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Ti-Al-Si-N and Ti-Al-N coatings were deposited on WC-Co substrates by a DC magnetron sputtering method. The oxidation behavior of two kinds of Ti0.75Al0.25N and Ti0.69Al0.23Si0.08N coatings were comparatively investigated by XRD patterns and GDOES depth profiles. Si addition of 8 at.% into Ti-Al-N film modified its microstructure to a fine composite comprising, Ti-Al-N crystallites and amorphous Si3N4, and to a smoother surface morphology. While the solid solution Ti0.75Al0.25N film had superior oxidation resistance up to around 700°C, the composite Ti-Al-Si-N film showed further enhanced oxidation resistance. Both Al2O3 and SiO2 layers played roles as a barrier against oxygen diffusion for the quaternary Ti-Al-Si-N film, whereas only the Al2O3 oxide layer formed at surface did a role for the Ti-Al-N film. The cutting performances of two coated carbide ball-end mills were evaluated by cutting of AISI D2 cold-worked die steel (60 HRC) under high-speed cutting condition. The tool wear and cutting temperature are discussed along with coating characteristics.

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Edited by:

Byungsei Jun, Hyungsun Kim, Chanwon Lee, Soo Wohn Lee

Pages:

141-144

Citation:

S. H. Shin et al., "Oxidation Behavior and Cutting Performance between Ti0.75-Al0.25-N and Ti0.69-Al0.23-Si0.08-N Coated Tool through Measurement of Cutting Temperature", Materials Science Forum, Vol. 569, pp. 141-144, 2008

Online since:

January 2008

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$38.00

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