· Fundición ·
Daniel Holmgren, Attila Diószegi and Ingvar L. Svensson.
Jönköping University, Dept. of Mechanical Engineering/Component Technology, S-551 11 Jönköping Swede
67th World Foundry Congress
Laser flash technique has been used to evaluate the thermal conductivity
of pearlitic grey cast iron solidified at three distinct cooling rates. Ten
different heats were performed with various inoculation treatments.
Influences of fraction primary phase and eutectic cell diameter have been
revealed by colour etching. SEM studies have been accomplished in order
to investigate the graphite morphology of the examined materials.
The thermal conditions during solidification together with the inoculation
strongly affect the thermal conductivity of grey iron. In general, a more
powerful inoculation increases the thermal conductivity. Increased
fractions of primary solidified dendrites lower the ability to transfer heat.
Small amounts of titanium increase the thermal conductivity of grey cast
iron considerably. The results show that maximum thermal conductivity is
achieved at moderate cooling rates.
