Technological principles for microtexturing the operating surfaces of ceramic cutting inserts by electrical discharge machining

The article describes the technological principles of electrical discharge machining of the surface layer of SiAlON dielectric ceramics based on the artificial creation of conductive conditions of the ceramics’ surface layer, making it possible to form microtextures such as microgrooves and microwel...

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Published in:Journal of physics. Conference series 2023-09, Vol.2573 (1), p.12020
Main Authors: Volosova, M A, Okunkova, A A, Fedorov, S V, Kolosova, N V, Gkhashim, K I
Format: Article
Language:English
Subjects:
Ceramic tools
Ceramics
Coatings
Electric discharge machining
Heat resistant alloys
Inserts
Nickel base alloys
Physics
Principles
Refractory metals
Superalloys
Surface layers
Titanium dioxide
Turning (machining)
Wear resistance
Zirconium dioxide
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container_start_page 12020
container_title Journal of physics. Conference series
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creator Volosova, M A
Okunkova, A A
Fedorov, S V
Kolosova, N V
Gkhashim, K I
description The article describes the technological principles of electrical discharge machining of the surface layer of SiAlON dielectric ceramics based on the artificial creation of conductive conditions of the ceramics’ surface layer, making it possible to form microtextures such as microgrooves and microwells/holes. It has been established that the processing stability between the electrode tool and the ceramic insert is increased by the deposition of electrically conductive coatings to ceramic inserts and supplying finely dispersed ZrO 2 and TiO 2 assisting powders into the interelectrode gap merged in a dielectric medium. The resistance tests carried out have shown that the use of compounds based on hard thermostable nitrides of refractory metals (AlCrTiNbSi)N and TiN-(AlCrTi)N as coatings with subsequent microtexturing provides a mutually reinforcing effect and makes it possible to increase the wear resistance of ceramic inserts up to 2.6 times when turning an Inconel 718 heat-resistant nickel alloy.
doi_str_mv 10.1088/1742-6596/2573/1/012020
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subjects Ceramic tools
Ceramics
Coatings
Electric discharge machining
Heat resistant alloys
Inserts
Nickel base alloys
Physics
Principles
Refractory metals
Superalloys
Surface layers
Titanium dioxide
Turning (machining)
Wear resistance
Zirconium dioxide
title Technological principles for microtexturing the operating surfaces of ceramic cutting inserts by electrical discharge machining
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