2. The surface of a 0.1% C steel gears is to be hardened by carburizing. In...

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Mechanical Engineering

2. The surface of a 0.1% C steel gears is to be hardened bycarburizing. In gas carburizing, the gears are placed in anatmosphere that provides 1.2% C at the surface of the steel at ahigh temperature. Carbon then diffuses from the surface into thegear. For optimum properties, the steel must contain 0.45% C at adepth of 0.2 cm below the surface. Design a carburizing heattreatment schedule that will produce these optimum properties.Assume that the temperature is high enough (at least 900°C) so thatthe iron has the FCC structure.

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