Influence of chromium content on the dry machining performance of cathodic arc evaporated TiA1N coatings

Harris, S. G., Doyle, E. D., Vlasveld, A. C., Audy, J., Long, John and Quick, D. 2003, Influence of chromium content on the dry machining performance of cathodic arc evaporated TiA1N coatings, Wear, vol. 254, pp. 185-194.

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Title Influence of chromium content on the dry machining performance of cathodic arc evaporated TiA1N coatings
Author(s) Harris, S. G.
Doyle, E. D.
Vlasveld, A. C.
Audy, J.
Long, John
Quick, D.
Journal name Wear
Volume number 254
Start page 185
End page 194
Publisher Elsevier BV
Place of publication Amsterdam, Netherlands
Publication date 2003-01
ISSN 0043-1648
1873-2577
Keyword(s) PVD
Cathodic arc evaporation
TiAlN
TiAlCrN
dry machining
Wear
Summary Physical vapour deposition (PVD) titanium aluminium nitride coated cutting tools are used extensively in global manufacturing for reducing production costs and improving productivity in a number of aggressive metal-cutting operations, namely, dry and high-speed machining. In this investigation, the performance of Ti1−xAlxN and Ti1−x−yAlxCryN coatings was assessed on Co-HSS twist drills used to machine grey cast iron. The failure criterion for drills was defined as a critical sized flank wear land at the outer corners of the drills. Using this criterion, the average tool life of uncoated twist drills was increased by factors of 2.5, 3.0 and 3.0 by Ti0.59Al0.41N, Ti0.27Al0.19Cr0.54N and Ti0.21Al0.14Cr0.65N coatings, respectively. Notwithstanding the similar increase in average tool life, the Ti1−x−yAlxCryN coatings produced more consistent results than the Ti1−xAlxN coated drills with standard deviations of 67, 3 and 19 holes, respectively. This result has significant practical implications in manufacturing, since drills are not replaced on an individual basis, but rather on a preset tool change frequency. The present paper discusses the performance of Ti1−xAlxN and Ti1−x−yAlxCryN coated drills in terms of average and practical drill life and concludes with remarks on the characterisation of PVD coatings and their significance on the performance of Co-HSS twist drills when dry machining grey cast iron.
Language eng
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2002, Elsevier Science B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30008628

Document type: Journal Article
Collection: School of Engineering and Technology
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