Calorimetric examinations of austempered ductile iron ADI

• Autorzy: Binczyk F. , Furmanek J. , Smolnicki T.
• Języki publikacji: EN

Abstrakty

EN

The study presents the results of calorimetric examinations during heating and cooling of austempered ductile iron ADI after austempering at temperatures of 280, 330 and 380°C. The samples for examinations were taken from cast rods of 20 and 60 mm diameter. Examinations were carried out on a differential scanning calorimeter, type Multi HTC S60. During heating, on a DSC curve one strong exothermic effect has been noted to occur (it does not occur in the case of common-grade cast iron), accompanied by two endothermic effects. The exothermic effect occurs within the range of about 20°C. Depending on the temperature of austempering treatment, its beginning falls to the temperatures from 469 to 490°C. The heat of this effect is proportional to the austenite content in ADI matrix after austempering. The endothermic effects are related with decomposition of pearlite (or bainite) and with phase transformation [...](ferrite as a constituent of ausferritic matrix.

Słowa kluczowe

EN

scanning calorimeter; temperature; heating; cooling; heat of phase transformations; pearlite; graphite

PL

kalorymetr skaningowy; temperatura; nagrzewanie; chłodzenie

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2007
• Tom: Vol. 7, iss. 4
• Strony: 5--8
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Binczyk F.

autor

Furmanek J.

autor

Smolnicki T.

• Silesian University of Technology, Chair of Metal Alloys and Composites Engineering, Krasińskiego St 8, 40-019 Katowice,

Bibliografia

• [1] J. Piaskowski, A. Jankowski, Nodular cast iron, WNT, Warsaw, 1974, (in Polish).
• [2] E. Guzik, Some selected problems concerning the processes of cast iron improvement, Archives of Foundry, No. 1M, (2001), (in Polish).
• [3] F. Binczyk, Constructional casting alloys. Silesian Technical University, Gliwice, 2003, (in Polish).
• [4] D. Myszka, Structural research of direct austempered ductile irons obtained in sand mould, Archives of Foundry, vol.1, No. 1(2/2), (2001), 263-270,(in Polish).
• [5] F. Binczyk, R. Przeliorz, J. Furmanek, J. Kulasa, The definition of scanning calorimetric method the enthalpy of phase change in nodular cast iron, Archives of Foundry, No. 19, (2006), 31-36, (in Polish).
• [6] F. Binczyk, J. Furmanek, R. Przeliorz, The definition of scanning calorimetric method the enthalpy of the phase change in grey cast iron, Archives of Foundry, No. 22, (2006), 49-55, (in Polish).