Paper Title:
Researches about the Determination of the Thermal Conductivity Coefficient for Silica Sand Moulds Used in Romanian Foundries
  Abstract

The paper presents the results of the researches regarding the determination of the thermal conductivity coefficient of the moulds used for cast iron parts in Romanian foundries. The instantaneous values of the thermal conductivity coefficient of the moulds are influenced by the type of materials that compose the moulding batch (sand, binder, additional materials) their content (percentage) their characteristics (grains form and dimensions), but also by the temperature. Many software used for casting solidification uses a mean substitutive value. This one include the effect of heat transmission by conduction in the mould wall and the secondary processes that influence the heat transfer throw the mould wall ( burning processes of organic substances, water evaporation and re-condensation processes, mass transport processes). The determination of this mean value in the case of casting grey cast iron parts with thickness of 20 mm is presented in the paper. A regressive method was applied. The solidification time experimentally determined throw thermal analyses is compared with the solidification time obtained by simulation, in three points of the casting. The value of the substitutive coefficient of thermal conductivity that assure the best closeness between the simulated solidification time and the solidification time experimentally determined throw thermal analysis in the three points was established.

  Info
Periodical
Edited by
Adel Nofal and Mohamed Waly
Pages
312-317
DOI
10.4028/www.scientific.net/KEM.457.312
Citation
I. Ciobanu, M. Chisamera, S. I. Munteanu, A. Crişan, I. Riposan, T. Bedő, I. C. Lupinca, "Researches about the Determination of the Thermal Conductivity Coefficient for Silica Sand Moulds Used in Romanian Foundries", Key Engineering Materials, Vol. 457, pp. 312-317, 2011
Online since
December 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Si Fa Xu, Zhe Wang, Yong Zhang
Abstract:A liner system such as liner sheet underlying impermeable soil layer having hydraulic conductivity less than 1*10-7 cm/s and a...
909
Authors: Shuang Ling Wu, Jun Yan Huang, Xiao Qing Qu, Zhen Guo, Li Hua Cui
Chapter 3: Packaging Technology and Equipments
Abstract:In order to shorten the development cycle of molded pulp products and reduce proofing costs of molded pulp products, the replacement of metal...
516
Authors: Osvaldo de Freitas Neto, Olavo Francisco dos Santos Jr., Fagner Alexandre Nunes de França, Ricardo Nascimento Flores Severo
Chapter 6: Geotechnical Engineering, Structural Engineering, Architecture and Urban Planning
Abstract:This paper intends to evaluate changes in permeability of a soil sample from Formação Barreiras, in Natal, the capital city of Rio Grande...
858