Wszystkie pola: solidification casting process - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Modelling of eutectic saturation influence on microstructure in thin wall ductile iron casting using cellular automata
Autorzy:: Burbelko, A. A.
Gurgul, D.
Kapturkiewicz, W.
Górny, M.
Powiązania:: https://bibliotekanauki.pl/articles/380375.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: proces krzepnięcia
automat komórkowy
modelowanie
solidification process
thin cellular automaton
modeling
Opis:: The mathematical model of the globular eutectic solidification in 2D was designed. Proposed model is based on the Cellular Automaton Finite Differences (CA-FD) calculation method. Model has been used for studies of the primary austenite and of globular eutectic grains growth during the ductile iron solidification in the thin wall casting. Model takes into account, among other things, non-uniform temperature distribution in the casting wall cross-section, kinetics of the austenite and graphite grains nucleation, and non-equilibrium nature of the interphase boundary migration. Calculation of eutectic saturation influence (Sc = 0.9 - 1.1) on microstructure (austenite and graphite fraction, density of austenite and graphite grains) and temperature curves in 2 mm wall ductile iron casting has been done.
Źródło:: Archives of Foundry Engineering; 2012, 12, 4; 11-16
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Influence of Structure on the Thermophisical Properties of Thin Walled Castings
Autorzy:: Górny, M.
Lelito, J.
Kawalec, M.
Sikora, G.
Powiązania:: https://bibliotekanauki.pl/articles/382519.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: solidification process
thin walled casting
graphite morphology
thermal diffusivity
specific heat
thermal conductivity
proces krzepnięcia
odlew cienkościenny
morfologia grafitu
dyfuzyjność termiczna
ciepło właściwe
przewodność cieplna
Opis:: This study addresses the effect of the cooling rate and of titanium additions on the thermophysical parameters of thin-walled compacted graphite iron (TWCGI) castings. Various molding materials were used (silica sand and insulating sand LDASC- Low-Density Alumina-Silicate Ceramic) to achieve different cooling rates. Different titanium additions were caused by various amount of Ferro Titanium. The research work was conducted for thin-walled iron castings with a 3-mm wall thickness. The tested material represents the occurrence of graphite in the shape of flakes (C and D types, according to the ISO Standard), nodules or compacted graphite with a percent of nodularity and different shape factor. Thermal conductivity has been determined by the laser flash technique in a temperature range of 22-600°C. The results show that the cooling rates together with the titanium content largely influence the graphite morphology and finally thermal conductivity of thin walled iron castings.
Źródło:: Archives of Foundry Engineering; 2015, 15, 2 spec.; 23-26
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The Influence of Mg Additive on the Structure and Electrical Conductivity of Pure Copper Castings
Autorzy:: Kranc, M.
Sikora, G.
Górny, M.
Garbacz-Klempka, A.
Powiązania:: https://bibliotekanauki.pl/articles/382946.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: solidification process
primary grains
pure copper
copper casting
Mg additive
electrical conductivity
proces krzepnięcia
ziarna pierwotne
miedź czysta
odlewanie miedzi
przewodnictwo elektryczne
Opis:: The aim of this paper was to attain defect free, pure copper castings with the highest possible electrical conductivity. In this connection, the effect of magnesium additives on the structure, the degree of undercooling (ΔTα = Tα-Tmin, where Tα – the equilibrium solidification temperature, Tmin – the minimum temperature at the beginning of solidification), electrical conductivity, and the oxygen concentration of pure copper castings have been studied. The two magnesium doses have been investigated; namely 0.1 wt.% and 0.2 wt.%. A thermal analysis was performed (using a type-S thermocouple) to determine the cooling curves. The degree of undercooling and recalescence were determined from the cooling and solidification curves, whereas the macrostructure characteristics were conducted based on a metallographic examination. It has been shown that the reaction of Mg causes solidification to transform from exogenous to endogenous. Finally, the results of electrical conductivity have been shown as well as the oxygen concentration for the used Mg additives.
Źródło:: Archives of Foundry Engineering; 2017, 17, 4; 85-90
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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