Determination of Eutectoid Transformation Temperatures in Ductile Cast Iron

• Autorzy: Orłowicz A. W. , Trytek A. , Mróz M. , Tupaj M.

Identyfikatory

DOI

10.1515/afe-2015-0078

• Języki publikacji: EN

Abstrakty

EN

The paper proposes a methodology useful in verification of results of dilatometric tests aimed at determination of temperatures defining the start and the end of eutectoid transformation in the course of ductile cast iron cooling, based on quenching techniques and metallographic examination. For an industrial melt of ductile cast iron, the effect of the rate of cooling after austenitization at temperature 900°C carried out for 30 minutes on temperatures TAr₁^start and TAr₁^end was determined. The heating rates applied in the study were the same as the cooling rates and equaled 30, 60, 90, 150, and 300°C/h. It has been found that with increasing cooling rate, values of temperatures TAr₁^start and TAr₁^end decrease by several dozen degrees.

Słowa kluczowe

EN

ductile cast iron; eutectoid transformation; cooling rate

PL

żeliwo sferoidalne; przemiana eutektoidalna; szybkość chłodzenia

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2015
• Tom: Vol. 15, iss. 4
• Strony: 51--54
• Opis fizyczny: Bibliogr. 10 poz., rys., wykr.

Twórcy

autor

Orłowicz A. W.

• Department of Casting and Welding, Rzeszow University of Technology, ul. W. Pola 2, 35-959 Rzeszów, Poland

autor

Trytek A.

• Department of Casting and Welding, Rzeszow University of Technology, ul. W. Pola 2, 35-959 Rzeszów, Poland

autor

Mróz M.

• Department of Casting and Welding, Rzeszow University of Technology, ul. W. Pola 2, 35-959 Rzeszów, Poland

autor

Tupaj M.

• Department of Casting and Welding, Rzeszow University of Technology, ul. W. Pola 2, 35-959 Rzeszów, Poland

Bibliografia

• [1] Bylica, A. (1971). The effect of silicon and manganese and heating rate on A1 transformation temperatures in ductile cast iron. Habilitation dissertation. Politechnika Śląska, Gliwice, Poland. (in Polish).
• [2] Polish Standard PN-68/H-04500.
• [3] Orłowicz, A.W. (1980). The effect of silicon and manganese and cooling rate on A1 transformation temperatures in ductile cast iron. Doctoral dissertation. Politechnika Śląska, Gliwice, Poland. (in Polish).
• [4] Sołncew, L.A., Ivanova, L.P., Miniajło, T.L. & Pawljuczenko, A.A. (1976). Wlianije temperaturyna nagariewa na mikrostrukturu i swojstwa nieligierowanego czuguna. Mietallowiedienije i Temiczeskaja Obrabotka Metallow. 6, 29-32.
• [5] Hummer, R. & Westerhalt, W. (1979). Untersuchungen zur Wärmebehandlung von Gusseisen mit Kugelgraphit unter besonderer Berucksichtung der Hertestellung von GGG-50. Giesserei Praxis. 1-2, 15–20.
• [6] Drapal, S. (1963). Eutektoide Umwaldung von Austenit im Gusseisen und Temperguss. Giesserei Techn. Wiss. Beih. 15, 87-97.
• [7] Voigt, R.C., Eldoky, L.M. & Chiou, H.S. (1986). Fracture of ductile cast irons with dual matrix structures. AFS Transactions. 94, 645-656.
• [8] Katecatepe, K., Cerah, M. & Erdogan, M. (2006). Effect of martensite volume fraction and its morphology on the tensile properties of ferritic ductile iron with dual matrix structures. Journal of Materials Processing Technology. 178, 44–51.
• [9] Sahin, Y., Erdogen, M. & Cerah, M. (2008). Effect of martensite volume friction and tempering time on abrasive wear of ferritic ductile iron with dual matrix. WEAR, 265, 196–202.
• [10] Andrews, K.W. (1965). Empirical formulae for the calculation of some transformation temperatures. J. Steel Inst. 203, 721.