Thermophysical properties of selected vermicular graphite cast iron alloy

• Autorzy: Homa M. , Sobczak N. , Turalska P. , Bruzda G. , Bacior M. , Warmuzek M. , Polkowska A.

Identyfikatory

DOI

10.7356/iod.2017.36

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of thermophysical properties of selected vermicular graphite cast iron with nominal chemical composition of 3.70 C; 2.30 Si; 0.44 Mn; 0.054 P; 0.015 S; 0.017 Mg (wt. %). The comparative studies of the alloy were performed using differential scanning calorimetry, dilatometry and laser flash analysis. The calorimetric investigations proved that upon the heating to melting temperature (~1200°C), four endothermic transformations take place: 1) ferromagnetic → paramagnetic at 742°C, 2) pearlite → austenite at 824.2°C, 3) allotropic transformation of bcc ferrite to fcc austenite at 802°C, 4) melting at 1173.1°C. The character of the dilatometric curve shows small deviation at the temperature above 810°C corresponding to the pearlite → austenite transformation. The values of thermal diffusivity and thermal conductivity change throughout the entire examined temperature range. Both curves showed a changeover from negative to positive trends between 700 and 800°C. This effect might be associated with the pearlite → austenite transformation.

Słowa kluczowe

EN

vermicular cast iron; thermophysical properties; transformation temperatures; melting heat; thermal expansion; thermal expansion coefficient; thermal diffusivity; thermal conductivity

• Wydawca: Instytut Odlewnictwa
• Czasopismo: Prace Instytutu Odlewnictwa
• Rocznik: 2017
• Tom: Vol. 57, no. 4
• Strony: 345--350
• Opis fizyczny: Bibliogr. 18 poz., rys., tab.

Twórcy

autor

Homa M.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Sobczak N.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland
• Institute of Precision Mechanics, ul. Duchnicka 3, 01-796 Warsaw, Poland

autor

Turalska P.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Bruzda G.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Bacior M.

• University of Agriculture in Krakow, Department of Physics, al. A. Mickiewicza 21, 31-120 Krakow, Poland

autor

Warmuzek M.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Polkowska A.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).