Physics, 15.10.2020 07:01 rachanachannagiri
Annealing is a process by which steel is reheated and then cooled to make it less brittle. Consider the reheat stage for a 100-mm-thick steel plate ( 7830 kg/m3 , F 550 J/kg K, N 48 W/m K), which is initially at a uniform temperature of 7L 200C and is to be heated to a minimum temperature of 550C. Heating is effected in a gas-fired furnace, where products of combustion at 7 800C maintain a convection coefficient of K 250 W/m2 K on both surfaces of the plate. How long should the plate be left in the furnace?
Answers: 3
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Annealing is a process by which steel is reheated and then cooled to make it less brittle. Consider...
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