High Temperature Thermal Stability of Innovative Nanostructured Thin Coatings for Advanced Tooling

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Abstract:

Tools for machining are made of hard steels and cemented carbide (WC-Co). For specialized applications, such as aluminium machining, diamond or polycrystalline cubic boron nitride are also used. The main problem with steel, isthat itexhibits a relatively low hardness (below 10 GPa) which strongly decreases upon annealing above about 600 K.Thus, the majority of modern tools are nowadays coated with hard coatings that increase the hardness, decrease the coefficient of friction and protect the tools against oxidation. A similar approach has been recently used to obtain a longer duration of the dies for aluminium die-casting.

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Key Engineering Materials (Volumes 622-623)

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45-52

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September 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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