Effect of different molding materials on the thin-walled compacted graphite iron castings
PBN-AR
Instytucja
Wydział Odlewnictwa (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Journal of Materials Engineering and Performance
ISSN
1059-9495
EISSN
1544-1024
Wydawca
Springer
DOI
Rok publikacji
2016
Numer zeszytu
10
Strony od-do
4359--4368
Numer tomu
25
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.7
Słowa kluczowe
EN
thermal conductivity
graphite morphology
compacted graphite cast iron
mold materials
Streszczenia
Język
EN
Treść
This article addresses the effects of six mold materials used for obtaining thin-walled compacted graphite iron castings with a wall thickness of 3 mm. During this research, the following materials were analyzed: fine silica sand, coarse silica sand, cerabeads, molohite and also insulated materials in the shape of microspheres, including low-density alumina/silica ceramic sand. Granulometric and SEM observations indicate that the sand matrix used in these studies differs in terms of size, homogeneity and shape. This study shows that molds made with insulating sands (microspheres) possess both: thermal conductivity and material mold ability to absorb heat, on average to be more than five times lower compared to those of silica sand. In addition to that, the resultant peak of heat transfer coefficient at the mold/metal interface for microspheres is more than four times lower in comparison with fine silica sand. This is accompanied by a significant decrease in the cooling rate of metal in the mold cavity which promotes the development of compacted graphite in thin-walled castings as well as ferrite fractions in their microstructure. © 2016, ASM International.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:101713
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