Annealing is a process by which steel is reheated andthen
Chapter 5, Problem 5.49(choose chapter or problem)
Annealing is a process by which steel is reheated andthen cooled to make it less brittle. Consider the reheatstage for a 100-mm-thick steel plate (??7830 kg/m3,c?550 J/kg?K, k?48 W/m?K), which is initially at auniform temperature of Ti?200C and is to be heatedto a minimum temperature of 550C. Heating iseffected in a gas-fired furnace, where products of com-bustion at T??800C maintain a convection coeffi-cient of h?250 W/m2?K on both surfaces of the plate.How long should the plate be left in the furnace?
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