Title: Metrological changes in surface profile, chip, and temperature on end milling of M2HSS die steel

Authors: K. Balamurugan

Addresses: Department of Mechanical Engineering, VFSTR (Deemed to be University), Guntur 522213, AP, India

Abstract: The effect of the thermal energy generated during end milling on the surface profile and chip morphology with a change in the spindle speed and feed rate is studied and reported. Steels with 5% molybdenum have found an amicable application as molybdenum based high speed die steel (M2HSS). It is used as the machining material. Taguchy's L9 orthogonal array machining condition is performed for two different tool diameters of 10 mm and 12 mm. High machining temperatures initiate a local welding zone, creates a weldment between the chip and tool surface, and progress to excess tool wear. This experimental study reveals that the details of increased thermal interaction that allows an excessive deformation of the sample through chip removal. With an increase in the high level of spindle speed and low feed rate, it is possible to get an acceptable level of surface profile roughness with a less tool wear rate. Further, the chip morphological analysis was performed and reported.

Keywords: end milling; die steel; wear; thermal integration; chip formation; chatter growth.

DOI: 10.1504/IJMMM.2020.111350

International Journal of Machining and Machinability of Materials, 2020 Vol.22 No.6, pp.443 - 453

Received: 01 Aug 2019
Accepted: 08 Jan 2020
Published online: 23 Nov 2020 *

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