ADVANCED ION–PLASMA SURFACE ENGINEERING OF HIGH-SPEED STEEL CUTTING TOOLS FOR MACHINING DIFFICULT-TO-CUT ALLOYS
DOI:
https://doi.org/10.55640/Keywords:
high-speed steel; ion nitriding; ion alloying; multilayer coatings; wear resistance; cutting toolsAbstract
High-speed steel cutting tools are still widely used in machining operations involving complex geometries and high dynamic loads. However, their application is limited by intensive wear and plastic deformation at elevated temperatures. This study investigates a complex ion–plasma surface modification approach combining ion nitriding, ion alloying, and multilayer nitride-based coatings to improve the wear resistance and operational stability of high-speed steel tools. Ion nitriding was applied to form a hardened diffusion layer, followed by ion alloying using Nb–Hf systems and the deposition of a (TiAl)N-based coating. Cutting tests performed during machining of a chromium–nickel alloy demonstrated a significant reduction in cutting forces and a 3–4-fold increase in tool life compared to conventionally coated tools.Downloads
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