Engineering, 18.08.2020 20:01, karmaxnagisa20

Steel balls 10 mm in diameter are annealed by heating to 1150 k and then slowly cooling to 450 k in an air environment for which T, = 325K and h = 25 W/m2-K. Assuming the properties of the steel to be k = 40 W/m-K, rho = 7800 kg/m3, and c = 600 J/kg-K, estimate the time required for the cooling process.

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Steel balls 10 mm in diameter are annealed by heating to 1150 k and then slowly cooling to 450 k in...