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Wyszukujesz frazę "tool morphology" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Machinability Studies on the Turning of Magnesium Metal Matrix Composites
Autorzy:
Gobivel, K.
Vijay Sekar, K.S.
Powiązania:
https://bibliotekanauki.pl/articles/2125540.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Mg-SiCp composite
cutting forces
surface quality
chip microstructure
tool morphology
Opis:
Magnesium-based MMCs are widely used in structural-based applications due to their lightweight, high hardness, corrosion and wear resistance. Also, machining is an important manufacturing process that is necessary to ensure dimensional accuracy and produce intricate shapes. In this context, the machining of Magnesium based metal matrix composites is undertaken to study the impact of the cutting parameters on the machinability behaviour. In this work, turning of pure Mg/SiCp on a Lathe is done and an in-depth assessment on the machining forces, machined surface quality, chip microstructure, and tool morphology has been carried out using TiAlN coated tooling insert. The analysis revealed that the thrust force decreased due to the thermal softening of the matrix meanwhile the feed force also followed the similar trend at higher cutting speeds because of the minimized built-up edge and cutting depth whereas principal cutting force was inconsistent at higher cutting speeds. The surface finish was better at high cutting speed - low feed combination. The chip microstructure revealed that gross fracture propagation at the free surface and variations in the shear bands have occurred at different cutting speeds. Tool studies using SEM analysis revealed wear modes like chipping and built-up edge at low cutting speeds, but with a reduced impact at intermediate cutting conditions, whereas abrasion wear was observed predominantly in the tool nose at higher cutting speeds.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 3; 939--948
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wear and surface characteristics on tool performance with CVD coating of Al2O3/TiCN inserts during machining of Inconel 718 alloys
Autorzy:
Agari, Shailesh Rao
Powiązania:
https://bibliotekanauki.pl/articles/2065755.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chip morphology
tool wear
surface roughness
superalloy
Inconel 718
zużycie narzędzia
chropowatość powierzchni
nadstop
Opis:
The Inconel 718 alloys, which are primarily temperature resistant, are widely used in aviation, aerospace and nuclear industries. The study on dry cutting processes for this alloy becomes difficult due to its high hardness and low thermal conductivity, wherein, most of the heat transfers due to friction are accumulated over the tool surface. Further, several challenges like increased cutting force, developing high temperature and rapid tool wear are observed during its machining process. To overcome these, the coated tool inserts are used for machining the superalloys. In the present work, the cemented carbide tool is coated with chemical vapor deposition multi-layering Al 2O 3/TiCN under the dry cutting environment. The machining processes are carried out with varying cutting speeds: 65, 81, 95, and 106 m/min, feed rate 0.1 mm/rev, and depth of cut 0.2 mm. The variation in the cutting speeds can attain high temperatures, which may activate built-up-edge development which leads to extensive tool wear. In this context, the detailed chip morphology and its detailed analysis are carried out initially to understand the machining performance. Simultaneously, the surface roughness of the machined surface is studied for a clear understanding of the machining process. The potential tool wear mechanism in terms of abrasion, adhesion, tool chip off, delaminating of coating, flank wear, and crater wear is extensively identified during the processes. From the results, it is observed that the machining process at 81 m/min corresponds to a better machining process in terms of lesser cutting force, lower cutting temperature, better surface finish, and reduced tool wear than the other machining processes.
Źródło:
Archive of Mechanical Engineering; 2022, LXIX, 1; 59--75
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morfologia powłok TiCN nanoszonych techniką fizycznego osadzania z fazy gazowej (PVD)
Morphology of TiCN coating deposited by physical vapour deposition technique
Autorzy:
Madej, M.
Ozimina, D.
Kowalczyk, J.
Pawelec, K.
Powiązania:
https://bibliotekanauki.pl/articles/404424.pdf
Data publikacji:
2017
Wydawca:
Wydawnictwo AWART
Tematy:
titanium nitride-carbide coating
TiCN coating morphology
cutting tool
azotek tytanu
morfologia powłoki
narzędzia tnące
TiCN
Opis:
In this paper the results of researches of coatings TiCN morphology were presented. Tested coating were deposited by PVD technique on tool steel HS6-5-2C surface. Coating thickness were measured by means of compact device Calotest CATs and optical microscope. Coating structure and its chemical analysis were made with the aid of electron microscope JSM 7100F with analyzer EDS. Hardness of coating were measured with the aid of hardness tester INNOVATEST. On the base of investigations results it was found that morphology features of tested coating fulfil potential requirements, e.g. on cutting tool edges or on machine elements worked in rugged conditions (great load, high temperature).
W artykule przedstawiono wyniki badań dotyczących morfologii powłok węglikoazotku tytanu TiCN uzyskanych w procesie fizycznego osadzania z fazy gazowej PVD na stali narzędziowej HS6-5-2C. Pomiaru grubości powłoki dokonano przy użyciu kompaktowego urządzenia Calotest CATc oraz mikroskopu optycznego. Obserwacje struktury i analizę składu chemicznego wykonano skaningowym mikroskopem elektronowym JSM 7100F wyposażonym w analizator EDS. Twardość zmierzono twardościomierzem INNOVATEST. Na podstawie rezultatów badań stwierdzono, że cechy morfologiczne badanych powłok spełniają potrzeby wynikające z ich potencjalnych zastosowań, a więc na ostrzach narzędzi skrawających i na elementach pracujących w trudnych warunkach (duże obciążenie, wysoka temperatura).
Źródło:
Obróbka Metalu; 2017, 3; 18-21
2081-7002
Pojawia się w:
Obróbka Metalu
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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