濡れ性を用いた切削加工用薄膜の切削抵抗評価

概要

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In this study, a new evaluation method of thin films for cutting tools with the wettability is proposed. The wettability is measured in order to evaluate the adhesion of work materials to cutting tools that may occur during the cutting work. Using liquid metal of pure iron and nine types of thin film; TiC, TiN, TiCN, TiAlN, TiSiN, TiBON, CrN, CrSiN, AlCrSiN coated substrates, the contact angle was determined using the sessile drop method. The cutting force measurement was also carried out with the thin film coated drills and carbon steel as work material. The cutting force was changed with the type of thin films and the values was in good agreement with the change of contact angle. The lowest cutting force and the highest contact angle was obtained for TiAlN film and usefulness of this film in drilling of carbon steel was confirmed. Consequently, it was revealed that this method was effective for the evaluation of suitability of work material and thin films.
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