Destruction of moulding sands with chemical binders caused by the thermal radiation of liquid metal
PBN-AR
Instytucja
Wydział Odlewnictwa (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Archives of Foundry Engineering
ISSN
1897-3310
EISSN
2299-2944
Wydawca
Polish Academy of Sciences. Commission of Foundry Engineering
DOI
Rok publikacji
2015
Numer zeszytu
4
Strony od-do
95--100
Numer tomu
15
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.42
Autorzy
(liczba autorów: 2)
Słowa kluczowe
EN
radiation
thermal destruction
heating of moulds
loss of strength
sand moulds
Streszczenia
Język
EN
Treść
The obtained results of heating of sand moulds with binders by means of a thermal radiation of liquid metal are presented in this study. Standard samples for measuring R<sub>g</sub> made of the tested moulding sands were suspended at the lower part of the cover which was covering the crucible with liquid metal (cast iron), placed in the induction furnace. The authors own methodology was applied in investigations. The progressing of the samples surface layers heating process was determined as the heating time function. Samples of a few kinds of moulding sands with chemical binders were tested. Samples without protective coatings as well as samples with such coatings were tested. The influence of the thermal radiation on bending resistance of samples after their cooling was estimated. The influence of several parameters such as: time of heating, distance from the metal surface, metal temperature, application of coatings, were tested. A very fast loss of strength of moulding sands with organic binders was found, especially in cases when the distance between metal and sample surfaces was small and equaled to 10÷15 mm. Then, already after app. 15 seconds of the radiation (at T<sub>met</sub>=1400°C), the resistance decreases by nearly 70%. Generally, moulding sands with organic binders are losing their strength very fast, while moulding sands with water glass at first increase their strength and later slightly lose. The deposition of protective coatings increases the strength of the mould surface layers, however does not allow to retain this strength after the metal thermal radiation.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:091841