Obrobitelnost slitiny INC 718 řeznou keramikou

THE MACHINABILITY OF INC 718 BY CERAMIC INSERTS

journal article in Web of Science

en

The work deals with a machinability of Inconel® 718 construction material (hereafter referred to as “INC 718”). This chromium-nickel alloy has an austenitic structure, which in conjunction with its low thermal conductivity is one of the causes of a worse machinability. The aim of the work was to increase the productivity of the roughing turning process. There are more ways to improve the machinability of the INC 718, starting from the heat treatment of the material and ending with the application of process fluids. This work is based on real requirements of a company and therefore the possibilities of elimination of the worse machinability were limited by economic and technological aspects. For this reason, the main tool for increasing the productivity of the machining process was changing the material of the cutting tool and fine-tuning of the cutting conditions. In another part of the work, an evaluation of the experimentally determined force ratios of the reference and newly designed technology, which is the basis for the stress-strain analysis, have been made. The conclusion of the research highlights the newly designed process in terms of machining times and the volume of material achieved per unit of the cutting edge durability.

Práce se zabývá obrobitelností materiálu Inconel® 718 (dále jen „INC 718“). Tato slitina chromu a niklu má austenitickou strukturu, což je ve spojení s nízkou tepelnou vodivostí jednou z příčin horší obrobitelnosti. Cílem práce bylo zvýšit produktivitu procesu hrubování soustružení. Existuje více způsobů, jak zlepšit obrobitelnost INC 718, počínaje tepelným zpracováním materiálu a konče aplikací procesních kapalin. Tato práce vychází ze skutečných požadavků společnosti, a proto byly možnosti eliminace horší obrobitelnosti omezeny ekonomickými a technologickými aspekty. Z tohoto důvodu byla hlavním nástrojem pro zvýšení produktivity obráběcího procesu změna materiálu řezného nástroje a jemné doladění řezných podmínek. V další části práce bylo provedeno vyhodnocení experimentálně stanovených silových poměrů referenční a nově navržené technologie, která je základem pro analýzu napětí-deformace. Závěr výzkumu zdůrazňuje nově navržený proces z hlediska doby obrábění a objemu materiálu dosaženého na trvanlivost břitu.

The work deals with a machinability of Inconel® 718 construction material (hereafter referred to as “INC 718”). This chromium-nickel alloy has an austenitic structure, which in conjunction with its low thermal conductivity is one of the causes of a worse machinability. The aim of the work was to increase the productivity of the roughing turning process. There are more ways to improve the machinability of the INC 718, starting from the heat treatment of the material and ending with the application of process fluids. This work is based on real requirements of a company and therefore the possibilities of elimination of the worse machinability were limited by economic and technological aspects. For this reason, the main tool for increasing the productivity of the machining process was changing the material of the cutting tool and fine-tuning of the cutting conditions. In another part of the work, an evaluation of the experimentally determined force ratios of the reference and newly designed technology, which is the basis for the stress-strain analysis, have been made. The conclusion of the research highlights the newly designed process in terms of machining times and the volume of material achieved per unit of the cutting edge durability.

obrobitelnost, těžko obrobitelné materiály, Inconel® 718, soustružení keramikou SIALON, řezné síly

machinability, hard-to-machine materials, Inconel® 718, turning with SIALON ceramic, cutting forces

01.06.2021

Vogel Publishing

Praha

1805-0476

June 2021

2

4483–4490

8