Autor: Kurowska, B. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Alternatywna technologia otrzymywania ausferrytu w żeliwie sferoidalnym
Alternative technology of obtaining ausferrite in the matrix of spheroidal cast iron
Autorzy:: Gumienny, G.
Kurowska, B.
Tematy:: żeliwo sferoidalne
ausferryt
ADI
analiza termiczno-derywacyjna (ATD)
zużycie ścierne
spheroidal cast iron
ausferrite
thermal and derivational analysis (ATD)
abrasion wear; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Powiązania:: https://bibliotekanauki.pl/articles/391371.pdf Link otwiera się w nowym oknie
Opis:: W pracy przedstawiono wybrane zagadnienia z zakresu możliwości otrzymania ausferrytu w żeliwie sferoidalnym bez stosowania obróbki cieplnej odlewów. Osnowa ausferrytyczna zapewnia, poza wysokimi właściwościami mechanicznymi, wysoką odporność na zużycie ścierne i adhezyjne. Proponowana technologia zakłada modyfikację składu chemicznego, w wyniku której możliwe jest otrzymanie osnowy ausferrytycznej, przy studzeniu odlewów w formie. Grafit sferoidalny otrzymano w technologii Inmold. Do oceny procesu krystalizacji oraz przemiany w stanie stałym zastosowano analizę termiczną i derywacyjną (ATD). Przedstawiono badania wpływu wybranych dodatków stopowych dodawanych w różnych proporcjach na mikrostrukturę osnowy żeliwa. Wykazano możliwość otrzymania ausferrytu w odlewach z żeliwa sferoidalnego bez konieczności stosowania obróbki cieplnej. Zbadano odporność żeliwa na zużycie ścierne i adhezyjne.
This study presents selected issues regarding the process of obtaining ausferrite from spheroidal cast iron without the application of thermal treatment to the casts. An ausferritic matrix, as well as strong mechanical properties, also ensures high abrasion and adhesion wear resistance. The proposed technology assumes that a change the chemical composition will take place, as a result of which it is possible to obtain an ausferritic matrix when the casts are cooled in the mould. Spheroidal graphite was obtained using Inmold technology. For the evaluation of the process of crystallization and transformation in the as-cast state, a thermal and derivational analysis (ATD) was carried out. Investigations of the effect of selected alloy additions in various proportions on the microstructure of the cast iron matrix were presented. It was demonstrated that it is possible to obtain ausferrite in spheroidal iron casts without the application of thermal treatment. The abrasion and adhesion wear resistance of cast iron was examined.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Analysis of the Graphite Shape in Cast Iron Obtaining by Inmold Process
Autorzy:: Gumienny, G.
Kurowska, B.
Tematy:: theory of crystallization
inmold process
graphite shape
teoria krystalizacji
technologia inmold
żeliwo sferoidalne; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/381705.pdf Link otwiera się w nowym oknie
Opis:: The paper presents results of research on the effect of magnesium on the graphite shape in cast iron obtained by Inmold process. For testing Lamet^® 5504 master alloy was used. The crystallization process of cast iron with various Mg concentrations was evaluated with use of the thermal and derivative analysis (TDA) method. The conditions were demonstrated for which a flake, vermicular and nodular graphite were obtained. Values of graphite “c” coefficient were analyzed. Results from it the significant differences between the assessment of the graphite on metallographic specimen and by the "c" coefficient. An effect of wall thickness of the casting on the graphite coefficient was indicated.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Analiza zmian wystepowania szkodnikow wtornych w strefach zagrozenia wokol Elektrowni Kozienice
Autorzy:: Kurowska, B.
Falencka-Jablonska, M.
Tematy:: zanieczyszczenia przemyslowe
sklad gatunkowy
lasy ochronne
Elektrownia Kozienice
lesnictwo
szkodniki wtorne; Pokaż więcej
Wydawca:: Polskie Towarzystwo Leśne
Powiązania:: https://bibliotekanauki.pl/articles/815459.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: The Effect of Manganese on the Crystallisation Process, Microstructure and Selected Properties of Compacted Graphite iron
Autorzy:: Gumienny, G.
Kurowska, B.
Just, P.
Tematy:: compacted graphite iron
crystallization
manganese
DTA method; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/354354.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the effect of manganese on the crystallization process, microstructure and selected properties: cast iron hardness as well as ferrite and pearlite microhardness. The compacted graphite was obtained by Inmold technology. The lack of significant effect on the temperature of the eutectic transformation was demonstrated. On the other hand, a significant reduction in the eutectoid transformation temperature with increasing manganese concentration has been shown. The effect of manganese on microstructure of cast iron with compacted graphite considering casting wall thickness was investigated and described. The nomograms describing the microstructure of compacted graphite iron versus manganese concentration were developed. The effect of manganese on the hardness of cast iron and microhardness of ferrite and pearlite were given.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Effect of the Annealing Temperature on the Microstructure and Properties of Ausferritic Nodular Cast Iron
Autorzy:: Gumienny, G.
Klimek, L.
Kurowska, B.
Tematy:: innovative casting materials
innovative casting technologies
ausferritic cast iron
nodular cast iron
impact strength
annealing
innowacyjne materiały odlewnicze
innowacyjne technologie odlewnicze
żeliwo ausferrytyczne
żeliwo sferoidalne
siła uderzenia
wyżarzanie; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/383050.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the microstructure and selected properties of ausferritic nodular cast iron annealed at the temperature 520 and 550°C. This choice was dictated by the temperatures used in the practice of nitriding. Nodular graphite in cast iron was obtained with use of Inmold process. Cast iron containing molybdenum and copper ensuring obtaining an ausferrite in the cast iron matrix without the use of heat treatment of castings was tested. The effect of annealing temperature on the microstructure and the kind of fracture of the ausferritic nodular cast iron was presented. The effect of an annealing temperature on hardness, impact strength and the microhardness of ausferritic nodular cast iron matrix was shown too. The lamellar structure of phases in the cast iron matrix after annealing has been ascertained. There has been an increase in hardness of an annealed cast iron and microhardness of its matrix. The reduction in the impact strength of the cast iron annealed at 520 and 550°C was approximately 10-30%. Both an increase in the hardness of cast iron as well as an decrease in its impact strength is probably due to the separation of secondary carbides during the heat treatment.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Compacted Graphite Iron with the Addition of Tin
Autorzy:: Gumienny, G.
Kurowska, B.
Fabian, P.
Tematy:: crystallization
graphite irons
tin
cooling curve
microstructure
krystalizacja
żeliwo grafitowe
cyna
krzywa chłodzenia
mikrostruktura; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/947624.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the effect of tin on the crystallization process, microstructure and hardness of cast iron with compacted (vermicular) graphite. The compacted graphite was obtained with the use of magnesium treatment process (Inmold technology). The lack of significant effect of tin on the temperature of the eutectic transformation has been demonstrated. On the other hand, a significant decrease in the eutectoid transformation temperature with increasing tin concentration has been shown. It was demonstrated that tin narrows the temperature range of the austenite transformation. The effect of tin on the microstructure of cast iron with compacted graphite considering casting wall thickness has been investigated and described. The carbide-forming effect of tin in thin-walled (3 mm) castings has been demonstrated. The nomograms describing the microstructure of compacted graphite iron versus tin concentration have been developed. The effect of tin on the hardness of cast iron was given.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Structural Studies of C-Ni-Pd Nanocomposite Films Deposited on Al₂O₃ Substrate
Autorzy:: Kozłowski, M.
Czerwosz, E.
Sobczak, K.
Kurowska, B.
Tematy:: 62.23.Pq
81.07.Bc
81.15.Gh
82.45.Mp; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1032987.pdf Link otwiera się w nowym oknie
Opis:: The properties of nanocomposite carbon-nickel-palladium (C-Ni-Pd) films deposited on Al₂O₃ substrate have been investigated and the results are presented in this work. C-Ni-Pd films were obtained by a 3 step process consisting of PVD/CVD/PVD methods. The structure and morphology of the obtained films were characterized by scanning electron microscopy and transmission electron microscopy techniques at various stages of film formation. Energy dispersive X-ray spectrometer was used for measuring the elements segregation in the obtained film. Transmission electron microscopy and scanning transmission electron microscopy observations have shown carbon nanotubes decorated with palladium nanoparticles in the final film. The average size of the palladium nanoparticles did not exceed 10 nm.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Nickel in Compacted Graphite Iron
Autorzy:: Gumienny, G.
Kurowska, B.
Szymczak, T.
Gawroński, J.
Tematy:: compacted graphite iron
crystallization process
DTA method; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/352803.pdf Link otwiera się w nowym oknie
Opis:: The paper presents results of the research work concerning effects of nickel concentration on the crystallization process, microstructure and selected properties of the compacted graphite iron. Compacted graphite in the cast iron was obtained with use of the Inmold process. The study has comprised the cast iron containing nickel up to concentration providing obtainment of austenitic microstructure of the matrix. The effect of the nickel on temperature of the eutectic crystallization was specified. It has been presented composition of the cast iron matrix in function of nickel concentration in a casting with wall thickness of 3 mm and 24 mm. Moreover, it has been presented conditions defining the possibility of obtaining an austenitic and martensitic compacted graphite iron. Effect of the nickel on hardness of the cast iron was described.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Hypoeutectic Al-Si Alloy Doped with Chromium, Tungsten and Molybdenum Designated for Pressure Die Casting
Autorzy:: Szymczak, T.
Gumienny, G.
Kurowska, B.
Pacyniak, T.
Tematy:: multicomponent Al-Si alloys
pressure die casting
DTA method; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/353170.pdf Link otwiera się w nowym oknie
Opis:: Structural modification of hypoeutectic Al-Si alloy EN-AC 46000 alloy influences its microstructure and mechanical properties. In a series of examinations the EN-AC 46000 alloy has been doped with Cr, W and Mo. The study involved the differential thermal analysis (DTA) and the light microscopy structural analysis of the samples cut from pressure die castings and from samples cast into the DTA cup. The DTA and microstructure analyses revealed new phases in the alloy doped with mentioned additives. The strength properties measurements of the alloys doped with Cr, W and Mo showed significant improvement in tensile strength and elongation, while preserving good hardness.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: FIB Method of Sectioning of III-V Core-Multi-Shell Nanowires for Analysis of Core/Sell Interfaces by High Resolution TEM
Autorzy:: Kret, S.
Kaleta, A.
Bilska, M.
Kurowska, B.
Siusys, A.
Dąbrowski, J.
Sadowski, J.
Tematy:: nanowires
HRTEM
STEM
EDS
FIB
GaAs
GaAlAs; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1033031.pdf Link otwiera się w nowym oknie
Opis:: The core-multishell wurtzite structure (In,Ga)As-(Ga,Al)As-(Ga,Mn)As semiconductor nanowires have been successfully grown on GaAs(111)B substrates using MBE technique. The nanowires cores were grown with gold eutectic catalyser in vapour-liquid-solid growth mode. The double shell overgrowth, on the side facets of nanowires, was performed using lower substrate temperature (about 400°C, and 230°C, for (Ga,Al)As, and (Ga,Mn)As shell growth, respectively). The polytypic ordering, defects, chemistry and geometric perfection of the core and the shells have been analysed at atomic level by advanced transmission electron microscope techniques with the use of axial and longitudinal section of individual nanowires prepared by focused ion beam. High quality cross-sections suitable for quantitative transmission electron microscope analysis have been obtained and enabled analysis of interfaces between the core and the shells with near atomic resolution. All investigated shells are epitaxial without misfit dislocations at the interface. Some of the shells thicknesses are not symmetric, which is due to the shadowing effects of neighbouring nanowires and directional character of the elemental fluxes in the MBE growth process.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Informacja

Wyszukujesz frazę "Kurowska, B." wg kryterium: Autor