| 摘要 |
In a process for carburizing ferrous parts, nitrogen gas is supplied to the vestibule of an integral quench furnace while a gaseous carbon source is supplied without a carrier gas to the furnace hot zone. H2O is introduced into the hot zone at the rate of 0.1-15 ml/min such that upon vaporization thereof a furnace hot zone atmosphere is formed which includes up to about 40% nitrogen, at least 14% CO and 40% H2. Subsequent to carburizing, parts may be annealed or bright hardened in the same furnace by increasing the H2O flow rate to the hot zone to establish an atmosphere comprised of at least 60% H2.
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