Citation :

Kamaruddin Kamdani, Omar Mohd Faizan Marwah, Zazuli Mohid, Fathan Fadzulli, "The Effects of TiAlN Coated Carbide Inserts in Milling Hardened JIS SKD11 Cold Work Tool Steel," International Journal of Engineering Trends and Technology (IJETT), vol. 74, no. 1, pp. 217-226, 2026. Crossref, https://doi.org/10.14445/22315381/IJETT-V74I1P116

Abstract

This research explores the behaviour and performance of TiAlN-coated carbide inserts during the dry milling of hardened JIS SKD11 tool steel, especially in regard to tool life, wear mechanism, surface finish, vibration character, and chip formation during the operation at different cutting speeds and feed rates. Results of the study indicate that the cutting speed is the most influential of the die cutting parameters in determining the tool life, as the higher cutting speeds quickly lead to advanced wear of the tool and diminish the wear resistance of the tool significantly. A better surface finish was produced at lower feed and cutting speeds due to lesser thermal and mechanical loads on the cutting edge. At higher cutting speeds, advancing notch wear was the main mechanism of tool wear, while greater amounts of tool wear produced commensurately higher amounts of vibration and lesser machining stability. The morphology of the chips produced changed from continuous to segmented as the cutting temperature increased, indicative of thermal softening and cutting zone instability. The research is of great significance in demonstrating the behaviour of TiAlN-coated carbide inserts in hard milling and shows the necessity of ascertaining certain cutting parameters to optimize tooling and surface quality in machining hardened steels.

Keywords

TiAlN coating, Hard milling, JIS SKD11 steel, Tool wear, Tool life, Surface roughness, Vibration analysis, Chip formation.

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