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Estimate how long must they remain in the furnace to achieve

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Carbon steel (AISI 1010) shafts of 0.1-m diameter are heat treated in a gas-fired furnace whose gases are at 1200 K and provide a convection coefficient of 100 W/m2· K. If the shafts enter the furnace at 400 K, use the lumped capacitance model to estimate how long must they remain in the furnace to achieve a centerline temperature of 800 K in s? Use ρ=7832 kg/m3, k=51.2W/(m·K), c=541J/(kg·K) and α=1.21×10-5 m2/s.

Reference no: EM132416653

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