Controlling of Pearlite Volume Fraction by Air Cooling From Intercritical Austenitizing Temperatures in GGG70 Ductile Cast Iron
Mehmet Uğur Söğüt Serdar Uğurlu Volkan Kılıçlı
AbstractIn this study, effect of air cooling from intercritical austenitizing temperatures on microstructure and hardness in GGG70 grade ductile cast irons. For this aim, ductile cast iron specimens air cooled from intercritical austenitizing temperatures at 780°C, 790°C, 800 °C, 810 °C, 820 °C, and 830 °C for 30 minutes. Experimental results showed that, pearlite volume fraction and hardness increased with increasing intercritical austenitizing temperatures. It can be produced ductile cast irons which has different pearlite volume fraction by controlling intercritically austenitizating in same chemical composition GGG70 grade ductile cast iron.