Engineering, 25.12.2019 03:31, drcarver

find the solidification time of the two iron castings when both are poured
(with no superheats) into the sand molds at initial temperature 28°c.
(i) a slab shaped casting of 10 cm thickness, (ii) a sphere of 10 cm in dia. iron: freezing temp: 1540°c; l= 272 kj/kg; density = 7850 kg/m3 sand: c = 1.17 kj/kg-k; k = 0.865 w/mk; density = 1600 kg/m3

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find the solidification time of the two iron castings when both are poured
(with no superheats...