Title: Machining M42 tool steel using superlattice layered nanocrystalline coatings deposited to WC-Co milling tools

Authors: Mark J. Jackson, Grant M. Robinson, Michael D. Whitfield, Waqar Ahmed

Addresses: Center for Advanced Manufacturing, College of Technology, Purdue University, 401 North Grant Street, West Lafayette, IN 47907-2021, USA. ' Center for Advanced Manufacturing, College of Technology, Purdue University, 401 North Grant Street, West Lafayette, IN 47907-2021, USA. ' Center for Advanced Manufacturing, College of Technology, Purdue University, 401 North Grant Street, West Lafayette, IN 47907-2021, USA. ' Nanotechnology Research Institute, University of Ulster, Newtownabbey, County Antrim, Northern Ireland BT37 0QB, UK

Abstract: The machining of M42 tool steel is discussed in this paper. Traditionally, these materials have been machined using uncoated cutting tools with limited success. New developments in titanium based coatings such as 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 that are deposited to cutting tool surfaces. Machining experiments indicated that cutting tool life is improved significantly using yttrium-doped titanium-based coatings when machining M42 tool steels.

Keywords: machining; titanium coatings; cutting tools; tool steels; superlattice layers; nanocrystalline coatings; milling tools; nanomanufacturing; tool life; yttrium-doped coatings.

DOI: 10.1504/IJNM.2007.014570

International Journal of Nanomanufacturing, 2007 Vol.1 No.4, pp.506 - 515

Published online: 16 Jul 2007 *

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