Title: Increasing productivity in hard turning of steels using CVD-coated carbide

Authors: Armansyah Ginting; Mohammed Nouari; Issam Bencheikh

Addresses: Laboratory of Machining Processes, Department of Mechanical Engineering, Faculty of Engineering, University of Sumatera Utara, Jalan Almamater, Building J17.01.01, Medan 20155, Indonesia ' LEM3 UMR CNRS 7329, Institut Mines-Telecom GIP-InSIC, University of Lorraine, 27 rue d'Hellieule, 88100 Saint-Dié-des-Vosges, France ' LEM3 UMR CNRS 7329, Institut Mines-Telecom GIP-InSIC, University of Lorraine, 27 rue d'Hellieule, 88100 Saint-Dié-des-Vosges, France

Abstract: Productivity is the essence of hard machining concept. Many aspects studied in hard machining but still were not dealing directly with productivity. In this study, the strategy dealing with an effort to increase productivity in cutting of hardened steel by utilising a triple-layer TiN/Al2O3/TiCN CVD-coated carbide tool has been developed. The selection of cutting condition, tool life criteria, cutting tool performance, and the quality of surface finish are considered in order to define the productivity parameters material removal rate (MRR) and volume of material removal (VMR). The study shows that the highest VMR of 1,050 cm3 when cutting AISI 1045 (42±1 HRC) and 433.88 cm3 for AISI 4340 (48±1 HRC) are achieved at flank wear (VB) 0.2 mm and surface finish (Ra) at smooth quality (N7-N8). The study also concludes that better tribological behaviour of coating layer(s) provides longer tool life, better surface quality, and higher productivity.

Keywords: flank wear; metal removal rate; surface roughness; triple-layer coating; volume of material removal.

DOI: 10.1504/IJMMM.2020.107060

International Journal of Machining and Machinability of Materials, 2020 Vol.22 No.3/4, pp.309 - 330

Received: 29 Mar 2019
Accepted: 16 Jul 2019

Published online: 10 Apr 2020 *

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