Thermal aspects of temperature transformations in silica sand

• Autorzy: Kowalski, J. S.
• Języki publikacji: EN

Abstrakty

EN

Problems related with the choice of moulding sand composition considering its behaviour in contact with molten metal were discussed. The investigations of high-temperature phenomena enable moulding sand composition to be evaluated in terms of its applicability under the specific conditions of a foundry shop. It is also possible to eliminate the casting defects related to moulding sand and its properties. The investigations were carried out on selected moulding sands from the family of the traditional carbon-free moulding mixtures. The effect of moulding sand composition and moisture content on the linear dilatation and stress formation caused by an allotropic quartz transformation was determined. The investigated phenomena were analysed on 3D diagrams plotted from the test data. A strong effect of the beta quartz - alpha quartz transformation at a temperature of about 600^oC was stated.

Słowa kluczowe

PL

odlewnictwo; masa formierska; piasek formierski

EN

founding; moulding; moulding mixture; moulding sand

• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2010
• Tom: Vol. 10, iss. 3
• Strony: 111--114
• Opis fizyczny: Bibliogr. 6 poz., rys., tab.

Twórcy

autor

Kowalski, J. S.

• Cracow University of Technology, Institute of Materials Engineering, ul. Warszawska 24, 31-155 Kraków, Poland,

Bibliografia

• [1] Lewandowski L.: Tworzywa na formy odlewnicze. Wyd. „Akapit”, Kraków, 1997.
• [2] Goerlich E.: Chemia krzemianów. Wyd. PWN Warszawa, 1973.
• [3] Baliński A. i in.: Komputerowa, trójwymiarowa ocena skłonności mas do tworzenia powierzchniowych wad odlewów. Opracowanie dla KBN, Instytut Odlewnictwa, Kraków, 1995.
• [4] Dietert H.: Badania mas formierskich i rdzeniowych w podwyższonych temperaturach i ich związek z jakością odlewów. Foundry, t. 102, 1957.
• [5] Henschel C.: Casting Dimension and Mold Dilatation. Mod. Casting, t. 50, 1966.
• [6] Poźniak P.: Rola wybranych parametrów materiałów formierskich w procesach temperaturowych mas formierskich. Engineer’s Thesis, Supervisor – PhD., Eng. Jerzy St. Kowalski, PK Kraków, 2007.