Quenching is a common method used for steel hardening. By rapidly cooling the metal down, microstructures...

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Quenching is a common method used for steel hardening. By rapidly cooling the metal down, microstructures and mechanical properties are enhanced with such heat treatment methods. Consider a carbon steel ball to be used in a ball bearing (p = 7800 kg/m², c, = 504 J/kg.K, k = 14 W/m.K), 0.5 cm in diameter, which is initially at (Ti = 850 °C), the ball is quenched in a bath of oil at 25 °C with a convection heat transfer coefficient (h = 450 W/m².K). How long does it take to achieve a center temperature of 50 °C? https://www.youtube.com/watch?v=9qSEfclfYbw Quenching is a common method used for steel hardening. By rapidly cooling the metal down, microstructures and mechanical properties are enhanced with such heat treatment methods. Consider a carbon steel ball to be used in a ball bearing (p = 7800 kg/m², c, = 504 J/kg.K, k = 14 W/m.K), 0.5 cm in diameter, which is initially at (Ti = 850 °C), the ball is quenched in a bath of oil at 25 °C with a convection heat transfer coefficient (h = 450 W/m².K). How long does it take to achieve a center temperature of 50 °C? https://www.youtube.com/watch?v=9qSEfclfYbw