Title:
ATMOSPHERE HEAT TREATING METHOD
Document Type and Number:
Japanese Patent JP3412218
Kind Code:
B2
Abstract:
PURPOSE: To reduce a predetermined quantity of purging inert gas and to shorten a length of a furnace in a method for heat treating in an atmosphere by heating an article to be heat treated slightly containing moisture like carbon sintered article to a high temperature in a non-oxidative atmosphere.
CONSTITUTION: A purging room 5 which is partitioned by partition doors 6A, 6B before and after a charge inlet 4 of a heat treating furnace 1 is provided, a heat source 7 and inert gas pouring port 12, an exhaust port 13 are provided at the room 5, and an article (a) to be treated containing moisture is charged in the room 5. It is heated to 100°C at a heating speed of 10°C/min or less by the source 7, inert gas is introduced into the room 5 during its period to replace the gas and steam evaporated from the article (a) with the inert gas in the room 5, and then the article (a) is charged in the furnace 1 held with a non- oxidative atmosphere.
Inventors:
Takashi Ishimoto
Application Number:
JP31265293A
Publication Date:
June 03, 2003
Filing Date:
November 17, 1993
Export Citation:
Assignee:
Daido Steel Co., Ltd.
International Classes:
B01J19/00; F27B9/04; F27D7/06; F27D13/00; (IPC1-7): F27D7/06; B01J19/00; F27B9/04; F27D13/00
Domestic Patent References:
| JP6127485A |
Attorney, Agent or Firm:
Koji Ito (1 person outside)