Cutting forces and wear analysis of Si3N4 diamond coated tools in high speed machining

• Type: Article in International Scientific Journal
• Date: 2008

Authors

Martinho, RP (Author) Other; Silva, FJG (Author) Other; Baptista, AM (Author) FEUP

Journal

Title: Vacuum

Vol. 82

Pages: 1415-1420

ISSN: 0042-207X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 8 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-003-X2C

DOI: 10.1016/j.vacuum.2008.03.065

Abstract (EN): Si3N4 tools were coated with a thin diamond film using a Hot-Filament Chemical Vapour Deposition (HFCVD) reactor, in order to machining a grey cast iron. Wear behaviour of these tools in high speed machining was the main subject of this work. Turning tests were performed with a combination of cutting speeds of 500, 700 and 900 m min(-1), and feed rates of 0.1, 0.25 and 0.4 mm rot(-1), remaining constant the depth of cut of I mm. In order to evaluate the tool behaviour during the turning tests, cutting forces were analyzed being verified a significant increase with feed rate. Diamond film removal occurred for the most severe set of cutting parameters. It was also observed the adhesion of iron and manganese from the workpiece to the tool. Tests were performed on a CNC lathe provided with a 3-axis dynamometer. Results were collected and registered by homemade software. Tool wear analysis was achieved by a Scanning Electron Microscope (SEM) provided with an X-ray Energy Dispersive Spectroscopy (EDS) system. Surface analysis was performed by a profilometer. (c) 2008 Elsevier Ltd. All rights reserved.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6