Comparison of Wear Behaviours of Cathodic Arc TiN, TiAlN Coated and Uncoated Twist Drills Under Aggressive Machining Conditions


Danışman Ş. , Savaş S. , Topal E. S.

Tribology in Industry, vol.30, no.1, pp.17-22, 2008 (Refereed Journals of Other Institutions)

  • Publication Type: Article / Article
  • Volume: 30 Issue: 1
  • Publication Date: 2008
  • Title of Journal : Tribology in Industry
  • Page Numbers: pp.17-22

Abstract

Recent advances in cutting tool materials and PVD surface coatings are making highspeed
dry machiningan increasingly viable machining operation in commercial
manufacturing sectors. In this investigation, the performance of cathodic arc TiN and
TiAlN coatings was assessed on HSS twist drills used to machine 1015 and 2080
workpiece materials under aggressive machining conditions. 17.6-26.4 m/min cutting
speeds and 0.10-0.15 mm/rev feed rates were used as cutting parametersand all the
experiments conducted under dryconditions. Number of holes drilled by TiN,
TiAlNcoated and uncoated tools observed and TiN coating was found to be superiour
than the others. The drill wear was observed using scanning electron microscopy (SEM)
and also macroscopy, and comparative wear properties were discussed.