1 results listed
Having combine mechanical properties (e.g. strength,
toughness and ductility makes the austempered ductile iron
(ADI) finding wide range of application areas. In recent years, to
obtain greater ductility than that by the conventional
austempering process, intercritical austempering process has
been focus of researches on ADI. This study deals with
intercritical austempering of GGG40 ductile cast iron by
isothermally treatment at 350 °C for a range of 25-150 minutes
following partly austenizing it at 800 °C and microstructural
examination of as-threated cast irons. Digital image processing
method was used to determine graphite nodularity having
responsibility of ductility and matrix phases influencing other
mechanical properties in the cast iron. Results showed that while
number of graphite particles decreases, their size and circularity
increases with increasing treatment time and a useful
austempering range can be defined as 100-150 min.
International Iron & Steel Symposium
UDCS
Erol Kilic
Cengiz Bagci
Kubilay Karacif