METHOD AND APPARATUS FOR HEAT TREATMENT, AND HEAT TREATMENT FURNACE USED FOR THE HEAT TREATMENT METHOD

Japanese Patent JP3956888

B2

PROBLEM TO BE SOLVED: To reduce output of a heater facing to a heat treatment holder, and to improve thermal efficiency.
SOLUTION: This heat treatment apparatus has the heat treatment holder 17 that has one pair of tabular connectors 18 made of a C/C composite arranged at a desired spacing in parallel, and integrally connecting each of both ends of a tabular resistance-exothermic part 19 made of the same material, which is arranged so as to extend in an orthogonal direction to the connectors 18 in an opposite plane to each connector 18. The resistance-exothermic part 19 has greater electrical resistance than that of the connector 18 so that when a current was passed through the resistance-exothermic part 19 between the connectors 18, the resistance-exothermic part 19 can generate heat due to the resistance. The heat treatment method comprises, when heating an object 12 to be heat-treated which is mounted on a hearth 10 of a heat treatment furnace together with the heat treatment holder 17 by the use of the heater 11a, contacting the heat treatment holder 17 with an electrode material 22 to pass the electric current through it and heat the heat treatment holder 17. Then, the heater 11a can eliminate necessary heat for heating the heat treatment holder 17 from its output.

Kazuhiko Katsumata

JP2003113382A

August 08, 2007

April 17, 2003

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Ishikawajima Harima Heavy Industries Co., Ltd.

C21D1/00; C21D1/34; F27B5/14; F27D11/02; (IPC1-7): C21D1/34; C21D1/00; F27B5/14; F27D11/02

JP10281651A
JP2001123219A

Mitsuo Sakamoto

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