Temat: Carbides - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Investigations on Wear Mechanisms of PVD Coatings on Carbides and Sialons
Autorzy:: Staszuk, M.
Pakuła, D.
Pancielejko, M.
Tański, T.
Dobrzański, L. A.
Powiązania:: https://bibliotekanauki.pl/articles/350842.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: PVD coatings
Sialon Tool Ceramics
carbides
Opis:: The paper presents the results on the wear resistance of PVD coatings on cutting inserts made from sintered carbide and sialon ceramics. The exploitative properties of coatings in technological cutting trials were defined in the paper, which also examined the adhesion of coatings to the substrate, the thickness of the coating, and the microhardness. As a result, it was found that isomorphic coating with AlN-h phase of covalent interatomic bonds exhibits much better adhesion to the sialon substrate than isomorphic coating with titanium nitride TiN. These coatings assure the high wear resistance of the coated tools, and the high adhesion combined with the high microhardness and fine-grained structure assure an increase in the exploitative life of the coated tools. In the case of coatings on substrate made from sintered carbide, there was a significant influence on the properties of the tools coated with them as concerns the existence of the diffusion zone between the substrate and the coating.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 4; 2095-2100
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The Analysis of Filler Material Effect on Properties of Excavator Crawler Track Shoe after Welding Regeneration
Autorzy:: Gucwa, M.
Winczek, J.
Wieczorek, P.
Mičian, M.
Koňár, R.
Powiązania:: https://bibliotekanauki.pl/articles/2049557.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: hardfacing
carbides
hardness
wear
covered electrode
Opis:: The application of hardfacing is one of the ways to restore the functional properties of worn elements. The possibility of using filler materials rich in chrome allows for better wear resistance than base materials used so far. The paper presents the results of research on the use of 3 different grades of covered electrodes for the regeneration of worn track staves. The content of the carbon in the covered electrodes was from 0,5% to 7% and the chromium from 5% to 33%. The microscopic and hardness tests revealed large differences in the structure and properties of the welds. The differences in the hardness of the welds between the materials used were up to 150 HV units. The difference in wear resistance, in the ASTM G65 test, between the best and worst materials was almost 12 times big.
Źródło:: Archives of Metallurgy and Materials; 2021, 66, 1; 31-36
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effect of Alloying Elements on Properties and Structure of High Chromium Cast Irons
Autorzy:: Kaňa, V.
Záděra, A.
Krutiš, V.
Powiązania:: https://bibliotekanauki.pl/articles/351222.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: high chromium cast irons
wear resistance
carbides
refinement
Opis:: The paper deals with hypereutectic high chromium cast irons. The subject of examination was the effect of various alloying elements (Ti, W, Mo, V) on the size of primary carbides and on the resultant material hardness. Using a scanning electron microscope with a wave dispersion analyser, the carbon content in carbides was established. To determine the other elements, an energy dispersion analyser was used. It was found that both the primary and the eutectic carbides were of the M₇C₃ type and very similar in composition. The carbides always contained Cr and Fe, and also W, Mo, V or Ti, in dependence on the alloying elements used. The structure of materials containing only chromium without any alloying additions exhibited coarse acicular primary carbides. The structure of materials alloyed with another element was always finer. Marked refinement was obtained by Ti alloying.
Źródło:: Archives of Metallurgy and Materials; 2018, 63, 2; 609-614
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Microstructure Characterization of High Carbon Alloy from the Ni-Ta-Al-Co-Cr System
Charakterystyka Mikrostruktury Wysokowęglowego Stopu Z Układu Ni-Ta-Al-Co-Cr
Autorzy:: Bała, P.
Powiązania:: https://bibliotekanauki.pl/articles/355810.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Ni-based alloys
γ phase
gamma phase
carbides
Opis:: In the present work results of investigations of the new high carbon alloy from the Ni-Ta-Al-Co-Cr system are presented. The alloy has been designed to have a good tribological properties at elevated temperatures. The chemical composition of this material was designed to obtain a matrix strengthening by the precipitation of γ phase (Ni3(Al,Ta)) and the primary carbides volume fraction above 25%. The primary carbides should remain stable in the microstructure, regardless of the heat treatment, in order to increase a wear resistance. The results of microstructure investigations in the as-cast condition are presented. The type of phases appearing in the microstructure was determined and their morphology described. The main microstructure components of the investigated Ni-based alloy with high carbon, cobalt and chromium content are: the γ phase, which constitutes a matrix, the γ phase, which occurs as fine globular precipitates and the primary Ta and Cr carbides (of MC and M7C3 type - respectively).
W pracy przedstawiono nowy stop na osnowie niklu o dużym stężeniu węgla, przewidywany do pracy w wysokiej temperaturze i w warunkach silnego zużycia tribologicznego. Skład chemiczny nowego materiału zaprojektowano tak, aby umocnienie osnowy uzyskać w wyniku wydzielania fazy γ (Ni3(Al,Ta)), a udział węglików pierwotnych wynosił ponad 25%. Węgliki powinny pozostać stabilne w mikrostrukturze niezależnie od obróbki cieplnej, wpływając korzystnie na odporność na ścieranie. Zamieszczono wyniki badan mikrostruktury stopu w stanie lanym. Określono rodzaj faz występujących w mikrostrukturze oraz opisano ich morfologie. Głównymi składnikami mikrostruktury badanego stopu na osnowie Ni, o dużej zawartości węgla, kobaltu i chromu są: faza γ (która stanowi osnowę) faza γ (która występuje w postaci drobnych kulistych wydzieleń) oraz pierwotne węgliki Ta (typu MC) i Cr (M7C3).
Źródło:: Archives of Metallurgy and Materials; 2012, 57, 4; 937-941
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Effect of Carbon Content on the Microstructure and Properties of Ti-6Al-4V Alloy
Autorzy:: Szkliniarz, A.
Szkliniarz, W.
Powiązania:: https://bibliotekanauki.pl/articles/356610.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: titanium alloys
carbon addition
titanium carbides
microstructure
properties
Opis:: The article shows the effect of the increased carbon content on the microstructure and properties of two-phase titanium alloy Ti-6Al-4V. Alloys with different carbon content (0.2 and 0.5 wt.%) were produced in vacuum induction furnace with cooper crucible. It was shown that the addition of carbon at the level of 0.2 wt.% increases hardness and strength properties, affects structural stability, results in grain refinement as well as improves creep and oxidation resistance. However, it has a negative effect on plastic deformation. Increasing the carbon content to the 0.5 wt.% causes the further improvement in the creep and oxidation resistance and microstructure refinement of the tested alloys, resulting also in decrease such properties as plasticity, hot deformability and in case of the susceptibility to cold plastic deformation to unacceptable level.
Źródło:: Archives of Metallurgy and Materials; 2020, 65, 3; 1197-1204
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Effect of Element Addition, Microstructure Characteristics, Mechanical Properties, Machining and Welding Processes of the Hadfield Austenitic Manganese Steel
Autorzy:: Zellagui, Rihab
Hemmouche, Larbi
Ait-Sadi, Hassiba
Chelli, Amel
Powiązania:: https://bibliotekanauki.pl/articles/2125536.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Hadfield steel
austenite
carbides
element addition effect
machinability
welding
Opis:: High manganese steel, also called Hadfield steel, is an alloy essentially made up of iron, carbon, and manganese. This type of steel occupies an important place in the industry. It possesses high impact toughness and high resistance against abrasive wear and hardens considerably during work hardening. The problem with this kind of steel is the generation of carbides at the grain boundaries after the casting. However, heat treatment at the high-temperature range between 950°C and 1150°C followed by rapid quenching in water is proposed as a solution to remove carbides and obtain a fully austenitic structure. Under the work hardening effects, the hardness of Hadfield steel increases greatly due to the transformation of the austenite γ to martensite ε or α and mechanical twinning, which acts as an obstacle for sliding dislocations. Hot machining is the only solution to machine Hadfield steel adequately without damage of tools or changing the mechanical characteristics of the steel. The choice of welding parameters is important to prevent the formation of carbides and obtain welded steel with great characteristics. This paper aims to give an overview about Hadfield steel, element addition effect, microstructure, heat treatments, work hardening, machinability and welding processes.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 3; 863--868
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Numerical Modelling of Micro-Stresses in Carbonised Austenitic Cast Steel Under Rapid Cooling Conditions
Autorzy:: Tuleja, J.
Zatorski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/353044.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: finite element method
micro-stresses
austenitic cast steel
carbides
fracture
Opis:: The paper presents a method of the numerical modelling of micro-stresses in carbonised austenitic cast steel being developed during rapid cooling due to differences in the values of thermal expansion coefficients for this material phases – carbides and austenitic matrix. Micro-stresses are indicated as the main cause of crack initiation in the tooling elements of carburising furnaces being mainly made of austenitic cast steel. A calculation model of carbonised and thermally fatigued austenitic cast steel was developed based on the microstructure images obtained using light microscopy techniques and the phase composition evaluated with the X-ray diffraction method. The values of the stress tensor components and the reduced stress in the complex models of test material structure were determined numerically by the finite element method. The effort analysis was performed and the areas where development of cracks is to be expected were identified, which was experimentally confirmed.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 2A; 635-641
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: WC-5Co Cemented Carbides Fabricated by SPS
Autorzy:: Siwak, P.
Grabiec, D.
Powiązania:: https://bibliotekanauki.pl/articles/352835.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: spark plasma sintering
cemented carbides
WC-5Co
hardness
fracture toughness
Opis:: New graphite tools were designed and produced to fabricate a semi-finished product from which nine cutting inserts were obtained in one spark plasma sintering process. As a result, WC-5Co cemented carbides were spark plasma sintered and the effect of various sintering parameters such as compacting pressure, heating rate and holding time on the main mechanical properties were investigated. It was shown that WC-5Co cemented carbides spark plasma sintered at 1200°C, 80 MPa, 400°C/min, for 5 min are characterized by the best relation of hardness (1861±10 HV₃₀ ) and fracture toughness (9.30 MPa·m^1/2). The microstructure of these materials besides the WC ceramic phase and Co binder phase consists of a synthesized Co₃ W₃ C complex phase. Comparison with a commercial WC-6Co cutting insert fabricated by conventional powder metallurgy techniques shows that spark plasma sintering is a very effective technique to produce materials characterized by improved mechanical properties.
Źródło:: Archives of Metallurgy and Materials; 2018, 63, 4; 2031-2037
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Comparative Analysis of Different WEDM Strategies Applied to Cut WC-Co Cemented Carbides
Autorzy:: Poroś, Dariusz
Powiązania:: https://bibliotekanauki.pl/articles/2023467.pdf
Data publikacji:: 2021
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: WEDM
wire electrode
cemented carbides
roughness
elektrody druciane
węgliki spiekane
chropowatość
Opis:: Cemented carbides WC-Co feature high mechanical properties and outstanding wear resistance. Traditional grinding of such hard workpiece features low material removal rate and diminished tool life. Notwithstanding that, even if, proper cooling fluid is applied; abrasive machining of cemented carbides characterizes poor efficiency. The aim of this study was to investigate the issue of WEDM of the cemented carbides WC-Co with two alternative materials of the wire electrodes applied. The presented experimental surface layer geometry measurements was carried out on a modern profilometer MITUTOYO SV 3200. Especially, WEDM results with wire flushing and in immersion were compared. Investigated were the effects of such input parameters as the pulse width and the time between two pulses on the output parameters such as area cutting efficiency, workpiece surface roughness in 2D and 3D. Analysing SEM microphotographs the surface layer defects after WEDM, cobalt depletion and pitting was discoursed. The analysed results provided WEDM of WC-Co cemented carbides with molybdenum wire electrode as seventy one percent less efficient and higher roughness was obtained for the same number of passes. The lowest height of the roughness on the surface after cutting with molybdenum wire amounted to Ra and Sa = 3.5 μm. Such roughness involves a 25 μm deep undesirable heat affected zone. WEDM with equal number of passes and brass wire resulted in roughness Ra and Sa =0,9 μm. In further research, an endeavour should be directed to examine different water and hydrocarbons derivative dielectrics impact on the surface layer structure and chemical composition of the machined WC-Co carbides.
Źródło:: Advances in Science and Technology. Research Journal; 2021, 15, 4; 126-135
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Mechanical and wear behaviour of the Al-Mg-nano ZrC composite obtained by means of the powder metallurgy method
Autorzy:: Sankaranarayanan, G.
Balaji, A. N.
Velmanirajan, K.
Gangatharan, K.
Powiązania:: https://bibliotekanauki.pl/articles/201320.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: aluminium
magnesium
zirconium carbides
wear
hardness
magnez
węgliki cyrkonu
zużycie
twardość
Opis:: This work concentrates on the impact and contribution of zirconium carbide (ZrC) and magnesium to the mechanical and tribological properties of aluminium matrix composites. Distinctive weight portions of zirconium carbide, containing fixed weight fractions of magnesium and strengthening aluminium composites, were prepared utilising the entrenched cold-press sintering technique used in powder metallurgy. The uniform powder mixture was obtained by using planetary ball milling and it was then observed by using the scanning electron microscope technique. The hardness of the hybrid composite increased along with increase in the amount of the ZrC particle. The wear losses of sintered Al-Mg-ZrC composites were explored by directing sliding tests in pin-on-disc equipment. Hybridisation of reinforcements also decreased the wear loss of the composites at high sliding load and speed. This study reveals that the hybrid aluminium composite can be considered a unique material with high strength, low weight and wear resistance that will find their application in components to be used in the automobile and aero space engineering sectors.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 5; 729-735
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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