Thermal analysis of ductile iron in thin walled casting

• Autorzy: Górny M.
• Języki publikacji: EN

Abstrakty

EN

Hypereutectic ductile iron was cast in self hardening moulding sand to produce castings with the shape of Archimedes spirals and with wall thickness of 1, 2 and 3 mm. Inmould technique was used to produce thin wall ductile iron (TWDI). In this work it has been carried out thermal analysis in spiral with 3 mm wall thickness. The present work provides results of thermal analysis, that are initial temperature of metal in mould cavity, velocity of metal stream as well as solidification time. Measurement of temperature shows that there is essential its drop during filling of mould cavity and amounts 230 °C for distance 700 mm from the beginning of spiral. On the basic on first derivative of temperature versus time characteristic solidification points were distinguish, namely solidification of primary graphite, austenite dendrite and eutectic. Experimental measurements of temperature drop during filling of mould cavity along with microscopic examinations of castings structure can be used to verify computer modeling and simulation of fluid flow and thermal field in TWDI.

Słowa kluczowe

EN

thermal analysis; thin wall castings; spiral of Archimedes; ductile iron

PL

analiza termiczna; odlewanie cienkościenne; spirala Archimedesa; żeliwo sferoidalne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2007
• Tom: Vol. 7, iss. 4
• Strony: 69--72
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Górny M.

• AGH - University of Science and Technology, Reymonta 23, 30-059 Kraków, Poland,

Bibliografia

• [1] E. Fraś, M. Górny, H.F. Lopez, Gradient structure of ductile iron. Archives of Foundry vol. 2/2, No. 18 (2006) 39-44.
• [2] E. Fraś, M. Górny, H.F. Lopez, Thin wall Ductile Iron Castings as a Gradient Material. Archives of Metallurgy and Materials vol. 51, No. 3 (2006) 423-431.
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• [7] K.M. Pedersen, N. Tiedje, Solidification of Hypereutectic Thin wall ductile Iron. Materials Science Forum vol. 508 (2006) 63-68.
• [8] R. Boeri, F. Weinberg, Microsegregation in ductile iron. AFS Transactions vol. 97 (1989) 179-184.
• [9] G. Rivera, R. Boeri, J. Sikora, Revealing and characterising solidification structure of ductile cast iron. Materials Science and Technology vol. 18 (2002) 691-697.
• [10] E. Fraś, M. Górny, H.F. Lopez, Chilling tendency and nodule count in ductile cast iron: Part I - Theoretical Background. AFS Transactions vol. 114 (2006) 575-594.
• [11] M. Górny, Structure of ductile iron in thin walled castings. Archives of Foundry Engineering vol. 7 (2007) no 4.