Preheated machining in end milling of hardened steel AISI D2

Lajis, M. A. and Amin, A. K. M. Nurul and Karim, A.N. Mustafizul and Ginta, Turnad Lenggo and Patwari, Muhammed Anayet Ullah (2008) Preheated machining in end milling of hardened steel AISI D2. In: 9th Global Congress on Manufacturing and Management (GCMM2008), 12-14 November 2008, Gold Coast, Australia.

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Abstract

This paper the outcome of a study on tool life and surface roughness of TiAlN coated carbide tools used in end milling of AISI D2 hardened steel under room temperature and preheated machining conditions. The tool life and surface roughness of TiAlN coated carbide tools was investigated at various combinations of cutting speed, feed and preheating temperature. Sufficient number of experiments was conducted based on the central composite design (CCD) which was adopted by response surface methodology (RSM) to generate tool life prediction values. Both first and second order quadratic models have been developed and the adequacy of the models were tested at 95% confidence interval. The effects of cutting conditions on tool life and tool wear morphology were also investigated. The experimental results show that preheated machining led to appreciable increasing tool life compared to room temperature machining. The percentage of tool life increase was between 190-315 % depending on preheating temperature. Preheating of the work material with higher heating temperatures (250-450 ºC) gives significant improvement in terms of tool life. Abrasive wear, attrition wear and diffusion wear are found to be a very prominent mechanism of tool wear. It has been observed that preheated machining of the material leads to surface roughness values well below 0.4 μm, such that the operations of grinding as well as polishing can be avoided at the higher cutting speeds.

Item Type:	Conference or Workshop Item (Full Paper)
Additional Information:	2872/17340
Uncontrolled Keywords:	Hardened steel, Preheated machining, Tool life, Tool wear, Surface roughness
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Dr. A.K.M. Nurul Amin
Date Deposited:	18 Apr 2012 15:24
Last Modified:	18 Apr 2012 15:24
URI:	http://irep.iium.edu.my/id/eprint/17340

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