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The effect of machining parameters on surface integrity when milling hardened steel

Rafai, Noor Hakim and Lajis, Mohd Amri and Hosni, Nor Ain Jamil (2014) The effect of machining parameters on surface integrity when milling hardened steel. Applied Mechanics and Materials, 660. pp. 70-73. ISSN 1662-7482

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Abstract

This study discussed about the influence of the cutting speed and radial depth of cut on surface integrity (microhardness and work-hardening) when performing hard milling of AISI D2 workpiece. By using PVD-TiAlN, nine experimental trials were performed at various cutting speeds of 80, 100 and 120 m/min and various radial depth of cut of 3, 4 and 5 mm as feed and depth of cut remain constant at 0.05 mm/tooth and 0.05 mm. From the result, due to high cutting temperature generated, the cutting speed adversely affects the microhardness value of the subsurface layer. At higher cutting speed of 120 m/min higher hardness values were obtained when compared with lower cutting speed of 80 m/min. As for the effect of the radial depth of cut it is clear that it influences the microhardness beneath the surface. Higher microhardness recorded from the radial depth of cut increment associated with high cutting temperature generated during machining.

Item Type: Article
Uncontrolled Keywords: PVD-TiAlN coated carbide; surface integrity; micro-hardness; work-hardening
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ1125-1345 Machine shops and machine shop practice
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Manufacturing and Industrial Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 31 Mar 2015 08:03
Last Modified: 31 Mar 2015 08:03
URI: http://eprints.uthm.edu.my/id/eprint/6472
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