Annealing is a process by which steel is reheated and then cooled to make it less brittle.
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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 (p = 7830 kg/m3, c = 550 J/kg ∙ K, k = 48 W/m ∙ K), which is initially at a uniform temperature of Tj = 200°C and is to be heated to a minimum temperature of 550°C. Heating is effected in a gas-fired furnace, where products of combustion at T∞ = 800°C maintain a convection coefficient of h = 250 W/m2 ∙ K on both surfaces of the plate. How long the plate should be left in the furnace?
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KNOWN Thickness properties and initial temperature of steel slab Convection conditions FIND Heating ...View the full answer
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Related Book For
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
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