Title: Micromachining M2 tool steel using nanostructured titanium-doped cutting tools

Authors: Mark J. Jackson, Grant M. Robinson, Waqar Ahmed, Christopher A. Rego, Wolf-Dieter Munz

Addresses: Centre for Advanced Manufacturing, College of Technology, Purdue University, West Lafayette, Indiana IN 47907-2021, USA. ' Centre for Advanced Manufacturing, College of Technology, Purdue University, West Lafayette, Indiana IN 47907-2021, USA. ' Nanotechnology Research Centre, University of Ulster, Newtownabbey, County Antrim, Northern Ireland, BT37 0QB, UK. ' Nanotechnology Research Centre, University of Ulster, Newtownabbey, County Antrim, Northern Ireland, BT37 0QB, UK. ' Materials Research Institute, Sheffield Hallam University, Pond Street, Sheffield, S1 4BU, UK

Abstract: Cation-substituted Ti_l-x-y-zAl_xCr_yY₂N alloys, with y = 0.03 and z = 0.02, have been shown to offer enhanced high-temperature oxidation resistance compared to presently used TiN and Ti_l-xAl_xN films. Layers (3 µm thickness) were deposited by unbalanced magnetron sputter deposition to small grain WC-Co unused cutting tools which had been ion etched in situ using a steered Cr-metal-ion cathodic arc discharge at an Ar pressure of 6 × 10^-4 mbar (0.45 mTorr). Machining experiments conducted at the meso and micro scales indicated that cutting tool life is improved significantly using yttrium-doped titanium-based coatings when machining M2 tool steel.

Keywords: micromachining; titanium coated cutting tools; tool steels; materials microstructures; hard materials; nanomanufacturing; magnetron sputter deposition; cutting tool life.

DOI: 10.1504/IJNM.2007.013695

International Journal of Nanomanufacturing, 2007 Vol.1 No.3, pp.370 - 388

Published online: 11 May 2007 *

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