Modeling and Analysis of the Cutting Force Components in the Hard Milling of Hardened Cr12MoV Steel
Received: 10 January 2026 | Revised: 25 February 2026 and 18 March 2026 | Accepted: 19 March 2026 | Online: 1 June 2026
Corresponding author: Huy Trieu Quy
Abstract
In the tough milling of hardened tool steels, cutting forces significantly affect process stability, tool wear, and spindle load. This study experimentally explores the orthogonal cutting force components (Fx, Fy, Fz) during hard milling of hardened Cr12MoV steel (48-52 HRC) using TiAlN-coated carbide inserts. Central Composite Design (CCD) combined with Response Surface Methodology (RSM) was used to model the effects of cutting speed and feed rate. Second-order regression models were created and statistically validated with Analysis of Variance (ANOVA). The results show that cutting speed decreases forces mainly due to thermal softening, while feed rate raises forces mainly because of increased chip thickness. Among the components, Fy is the most sensitive to dynamic excitation. Based on these models, a stable cutting window is proposed for industrial use. The findings offer a dependable empirical basis for force prediction and the safe selection of parameters in finish hard milling of Cr12MoV die steel.
Keywords:
hard milling, cutting force, Cr12MoV, CCD, RSM, TiAlN toolReferences
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