| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for heat treatment capable of stabilizing CP (Carbon Potential) in a furnace. SOLUTION: In the method for heat treatment by feeding converted gas and enriched gas in a furnace to perform the heat treatment of a workpiece in the furnace, the carbon potential is feedback-controlled by operating the feed flow rate of the enriched gas based on the carbon potential in the furnace, the feedback control is stopped before an opening of the furnace is opened, and the feed flow rate of the converted gas and the enriched gas is respectively increased over the feed flow rate immediately before stopping the feedback control. After closing the opening of the furnace, the feed flow rate of the converted gas is returned to the feed flow rate immediately before stopping the feedback control to re-start the feedback control. COPYRIGHT: (C)2011,JPO&INPIT
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