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<p>The advancement of industrial technology has led to the optimization of cutting tools used in machining operations. Consequently, coating deposition processes have shown considerable growth. Innovative coating methods have been developed and applied to machining tools, as for example, scientific research focused on characterizing and assessing coatings that facilitate low friction and enhanced lubrication, such as DLC films, as well as those that offer superior oxidation resistance and elevated machining speeds, characteristics inherent to TiAlN coatings. Thus, the aim of this study was to assess a double-layer TiAlN/DLC coating and describe it regarding its thickness, structure, chemical composition, morphology, hardness, Young’s modulus, adhesion to the substrate, and the behaviour in milling operations, regarding the wear and roughness analysis. In fact, a gap exists in the literature, namely for milling and finishing processes related to AMPCOLOY® 83, which was the main motivation to perform this work. SEM examinations confirmed that the coating consists of two layers with a gradient transition between them. The coating exhibited 5.6 GPa hardness and 93.2 GPa Young’s modulus. In the sliding adhesion tests (“Scratch Test”), adhesive failure LC2 occurred at approximately 35 N, accompanied by an acceptable cracking pattern, type HF2. After milling AMPCOLOY® 83, both coated and uncoated tools were examined using an electron microscope, and the wear processes were assessed. The tool flank wear and the surface roughness of the machined part were also evaluated. The coated tools demonstrated superior performance compared to the uncoated tools, being the wear measurement around half the value. The main wear mechanisms were abrasion and material adhesion. The intensity of wear mechanisms was substantially lower in coated tools.</p>

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Characterization and wear behaviour of TiAlN/DLC coating deposited on cutting tools for milling AMPCOLOY® 83

  • 期刊论文

  • 发表日期：

    2025年11月25日

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  • Naiara Sebbe,
  • Fábio Freitas,
  • Francisco Silva,
  • Rafaela Casais,
  • Rui Martinho,
  • Luís Magalhães,
  • Ricardo Alexandre,
  • Rita Sales-Contini

摘要

The advancement of industrial technology has led to the optimization of cutting tools used in machining operations. Consequently, coating deposition processes have shown considerable growth. Innovative coating methods have been developed and applied to machining tools, as for example, scientific research focused on characterizing and assessing coatings that facilitate low friction and enhanced lubrication, such as DLC films, as well as those that offer superior oxidation resistance and elevated machining speeds, characteristics inherent to TiAlN coatings. Thus, the aim of this study was to assess a double-layer TiAlN/DLC coating and describe it regarding its thickness, structure, chemical composition, morphology, hardness, Young’s modulus, adhesion to the substrate, and the behaviour in milling operations, regarding the wear and roughness analysis. In fact, a gap exists in the literature, namely for milling and finishing processes related to AMPCOLOY® 83, which was the main motivation to perform this work. SEM examinations confirmed that the coating consists of two layers with a gradient transition between them. The coating exhibited 5.6 GPa hardness and 93.2 GPa Young’s modulus. In the sliding adhesion tests (“Scratch Test”), adhesive failure LC2 occurred at approximately 35 N, accompanied by an acceptable cracking pattern, type HF2. After milling AMPCOLOY® 83, both coated and uncoated tools were examined using an electron microscope, and the wear processes were assessed. The tool flank wear and the surface roughness of the machined part were also evaluated. The coated tools demonstrated superior performance compared to the uncoated tools, being the wear measurement around half the value. The main wear mechanisms were abrasion and material adhesion. The intensity of wear mechanisms was substantially lower in coated tools.