| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat treatment method by which atmosphere in a heat treatment chamber is not harmed due to atmospheric air inflowing from a quenching chamber. <P>SOLUTION: There is provided the heat treatment method by which a treatment object 2 heat-treated under non reduced pressure in a heat treatment chamber 3 is cooled in the quenching chamber 4. In the method, when quenched treatment object 2 is taken out from the quenching chamber 4, the communication for introducing gas from the heat treatment chamber 3 to the quenching chamber 4 is intercepted. As a result, the air does not inflow from the quenching chamber 4 side to the heat treatment chamber 3 side, so that the atmosphere in the heat treatment chamber 3 is not harmed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
