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How long is the heating process for carbonitriding done for?

How long is the heating process for carbonitriding done for? Correct Answer 2-10 hours

The carbonitriding process is carried out in a gas atmosphere furnace using a carburizing gas such as propane or methane mixed with ammonia. The workpiece is heated to 850oC in the mixture of gases for 2-10 hours followed by quenching and tempering.

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