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research-article

Tribological Performance of MoS2 Filled Micro-Textured Cutting Tools during Dry Sliding Test

[+] Author and Article Information
Kishor Kumar Gajrani

Department of Mechanical Engineering, Indian Institute of Technology Guwahati, 781 039, India
g.kishor@iitg.ernet.in

Ravi Sankar Mamilla

Department of Mechanical Engineering, Indian Institute of Technology Guwahati, 781 039, India
evmrs@iitg.ernet.in

Uday S. Dixit

Department of Mechanical Engineering, Indian Institute of Technology Guwahati, 781 039, India
uday@iitg.ernet.in

1Corresponding author.

ASME doi:10.1115/1.4037354 History: Received March 07, 2017; Revised June 26, 2017

Abstract

Strict environmental laws enforced on manufacturing industries resulted in the development of alternative techniques to reduce or eliminate the use of lubricants during sliding contact as well as machining. Tribology plays very important role for tool life in machining. To improve the life of cutting tool, cutting fluids are used. However, cutting fluids only penetrate into region of sliding contact. In this study, the effect of surface texturing on plasma nitrided high speed steel (HSS) pins during dry sliding test is invesitgated for understanding the performance of textured HSS tools in machining. Micro-textures were fabricated using Vickers hardness tester on the surface of HSS pins. Tribological tests of molybdenum disulphide (MoS2) filled as well as unfilled micro-textured HSS with area density of textures varying from 2-14% were performed with the aid of pin-on-disc tribometer against an abrasive sheet. Friction and wear performance were assessed in terms of the pin surface temperature, coefficient of friction, wear, weight loss of the pin and wear rate. Worn-out test surfaces were observed under scanning electron microscope to understand the wear mechanism. The best results were obtained with MoS2 filled micro-textures having 10% texture area density. Tool-chip interface temperature, cutting force, feed force and centre line average surface roughness were also assessed during maching test with 10% area density of textured cutting tools.

Copyright (c) 2017 by ASME
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