High-Strength Ceramic Cutting Tools with Multipurpose Coatings for Highly Effective Processing of Tempered Steel

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The article considers new technological principles of designing of vacuum-plasma coatings for ceramics on the basis of Al203–TiC and Si3N4 and the requirements for the following coatings: (Zr, Hf, Cr) N; (Ti, Cr) N; ZrN. Each of these coatings has specific features which can significantly improve working capacity of ceramics in various operation conditions. Technological process and the equipment for deposition of coating on ceramic samples and cutting plates are developed. Undertaken studies of the coatings deposited according to the developed technological principles, show ability to increase considerably beam strength of the samples from oxide-carbide and nitride ceramics. The article shows the possibility to replace grinding operation of details of bearings from tempered steels like ShH15SG type (62 ... 65HRC) to turning by the cutting tools equipped with plates from Al203-TiC ceramics with a coating (Zr, Hf, Cr)N.

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148-153

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December 2014

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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