Aluminum is cast in an insulating ceramic mold with no superheat. The thickness of the casting...
Aluminum is cast in an insulating ceramic mold with no superheat. The thickness of the casting is 0.5 cm and for the ceramic material c=0.18 cal/g-oC, r = 1.6 g/cm3 and k = 9.1 x 10-4 cal/cm-oC-s. Data for aluminum are in Appendix B. Calculate the freezing time of the casting. Assume negligible resistance to heat flow at the metal/mold interface and within the solidified metal, and an ambient temperature of 25 oC.
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Aluminum is cast in an insulating ceramic mold with no
superheat. The thickness of the casting...
We are solidifying aluminum and iron melts in plaster molds. The melts are poured with no...
We are solidifying aluminum and iron melts in plaster molds. The melts are poured with no superheat and resistance to heat flow at the mold/metal interface and within the solidified metal are negligible. Plot thickness of the solidified layer, s, vs. (t)1/2. Repeat calculations also for a sand mold. What can you conclude?
1) A disk 40 cm in diameter and 5 cm thick is to be cast of...
1) A disk 40 cm in diameter and
5 cm thick is to be cast of pure aluminum in an open mold casting
operation. The melting temperature of aluminum = 660°C, and the
pouring temperature will be 800°C. Assume that the amount of
aluminum heated will be 5% more than what is needed to fill the
mold cavity. Compute the amount of heat that must be added to the
metal to heat it to the pouring temperature, starting from a...
1) A disk 40 cm in diameter and
5 cm thick is to be cast of pure aluminum in an open mold casting
operation. The melting temperature of aluminum = 660°C, and the
pouring temperature will be 800°C. Assume that the amount of
aluminum heated will be 5% more than what is needed to fill the
mold cavity. Compute the amount of heat that must be added to the
metal to heat it to the pouring temperature, starting from a...
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