- Tytuł:
- Thermophysical properties of selected vermicular graphite cast iron alloy
- Autorzy:
-
Homa, M.
Sobczak, N.
Turalska, P.
Bruzda, G.
Bacior, M.
Warmuzek, M.
Polkowska, A. - Powiązania:
- https://bibliotekanauki.pl/articles/391848.pdf
- Data publikacji:
- 2017
- Wydawca:
- Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
- Tematy:
-
vermicular cast iron
thermophysical properties
transformation temperatures
melting heat
thermal expansion
thermal expansion coefficient
thermal diffusivity
thermal conductivity - Opis:
- 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.
- Źródło:
-
Prace Instytutu Odlewnictwa; 2017, 57, 4; 345-350
1899-2439 - Pojawia się w:
- Prace Instytutu Odlewnictwa
- Dostawca treści:
- Biblioteka Nauki
Artykuł