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Liquid carburizing temperature range lies between ________

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Liquid carburizing temperature range lies between ________

(a) 120-250^oC

(b) 300-375^oC

(c) 425-660^oC

(d) 870-950^oC

This question was posed to me in an online quiz.

This intriguing question originated from Carburizing in chapter Heat Treatment of Engineering Material & Metallurgy

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The correct choice is (d) 870-950^oC

Best explanation: Liquid carburizing is carried out in baths of molten salt containing 20-50% sodium cyanide, 40% sodium carbonate, and with varying quantities of sodium or barium chloride. The cyanide-rich mixture is heated in iron pots to a temperature of 870-950^oC. The workpiece is immersed for a little longer than 5-minute periods according to the depth of the case required.

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