| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat treatment furnace to be used for heat treatment of steel materials, having a wider furnace capacity while stabilizing a furnace atmosphere without using bricks for a furnace body. SOLUTION: The heat treatment furnace is provided for heating treated objects to be treated. A ceiling portion 5e, a floor portion 5f and side walls 5a, 5b, 5c, 5d of the furnace body 5 are each formed with a furnace shell layer 31, a heat insulating layer 32 provided inside the furnace shell layer, and a ceramic fiber layer 33 provided inside the heat insulating layer. A plurality of ceramic rails 20 are provided in the furnace body for the treated objects to be placed thereon. COPYRIGHT: (C)2007,JPO&INPIT
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