Conventional flow curves of liquid cast iron put on spheroidization

• Autorzy: Borowiecki B.
• Języki publikacji: EN

Abstrakty

EN

The purpose of the investigation was to confirm the hypothesis that the conventional flow curves of liquid cast iron put on sferoidization determined from the rod fluidity test are comparable to flow curves of liquids in environmental temperature. Moreover has been identified, that conventional flow curves for this liquid cast iron are similar to generalized non- Newtonian liquids curves. For rods with the diameters 3-8 mm there are three various curves: 1 - the flow curve of liquid cast iron put on spheroidization overheated about 80 K resemble a shape adequately to a curve of densified liquid with shearing. This phenomenon can be caused by high overcooled and creation of crystallization nuclei; 2 - metal alloys overheated about 180 K resemble a shape adequately to Newtonian liquid; 3 - metal alloys overheated about 210 K resemble a shape of curve adequately to dispersed liquid with shearing. This phenomenon probably depends on influence of gas which creates on boundary of metal-sand mould.

Słowa kluczowe

EN

foundry process; flow curves; cast iron

PL

procesy odlewnicze; krzywa płynięcia; żeliwo

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2008
• Tom: Vol. 8, iss. 1
• Strony: 23--26
• Opis fizyczny: Bibliogr. 9 poz., rys., tab., wykr.

Twórcy

autor

Borowiecki B.

• Politechnika Szczecińska, Instytut Inżynierii Materiałowej, Zakład Metaloznawstwa i Odlewnictwa, 70-350 Szczecin, Aleja Piastów 19,

Bibliografia

• [1] Z. Kembłowski, Applied Fluid Rheology, Marcus s.c., Łódź (1995) (Reologia stosowana płynów).
• [2] W. Prosnak, The equations of classical mechanics of fluids, PWN, Warsaw (2006) (Równania klasycznej mechaniki płynów).
• [3] B. Staniszewski, Heat transmission, PWN, Warsaw (1980) (Wymiana ciepła).
• [4] L. Prandtl, Mechanics of flows, WNT, Warsaw (1956) (Mechanika przepływów).
• [5] W.L. Wilkinson, Non-Newtonian liquids, WNT, Warsaw (1963) (Ciecze nienewtonowskie).
• [6] H. Anspach, Fluidities tests and their analysis, Gießerei-technik, H8 (1963) 235-241 (Fließproben und ihre Auswertung).
• [7] B. Borowiecki, Chosen aspects of construction of the gating system in sand moulds. Wydawnictwo Politechniki Szczecińskiej, Szczecin 2005. (Wybrane aspekty konstrukcji układów wlewowych w formach piaskowych),
• [8] A. Bydałek, The mechanizm of filling casting mould by liquid metal, , Solidifaction of metals and alloys, No. 37, (1998) 31-40 (O mechanizmie wypełniania formy odlewniczej ciekłym metalem).
• [9] B. Borowiecki, Computer simulation of round bar fluidity test, Solidifaction of metals and alloys, No. 40 (1999) 15-24.