| 摘要 |
The method for quenching a steel charge after carburizing or carbonitriding is carried out at atmospheric pressure and comprises the following steps: the charge is extracted from a treatment furnace (1) at a temperature ranging from 750 DEG C to 1100 DEG C; b) the charge is transferred to a quenching cell (3); c) a quenching fluid is introduced at a pressure which is higher than atmospheric pressure; d) the charge is cooled to a temperature of less than 400 DEG C. According to the invention, the fluid is primarily composed of air, and the part is brought to a temperature of at least 400 DEG C, whereby an oxide layer preventing decarburization is formed in the time period starting from the moment when the charge exits (1) from the furnace.
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