Abstract
It has been shown earlier that abrasion-resistant coatings on cutting tool can reduce tool wear and friction in micro milling and other machining processes. However, due to coating, the edge radius of micro end mill increases, and the influences of size effects become significant. Therefore, proper selection of the coating thickness is crucial to reduce friction and size effects together. In this article, thin-film coating of TiAlN of different thicknesses (0.5, 1, 2 and 3 μm) has been applied on the WC micro end mill using the physical vapour deposition (PVD) method. First, the enhanced tribological performance of TiAlN coating over un-coated WC material has been verified by evaluating the hardness and coefficient of friction values of both the materials. Next, the appropriate coating thickness value has been selected by experimental and analytical assessments of the machinability parameters and stability limit, respectively, in micro milling of P-20 steel. From the cumulative experimental and analytical investigations, TiAlN coated tool having coating thickness ≈ 1 μm has been found to be the appropriate thin film thickness by witnessing improved machinability and stability limit as compared to the uncoated WC tool and TiAlN coated tools of other coating thicknesses.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
