Title: Method and apparatus for heat-treatment
Application Number: 86103451 Application Date: 1986.05.21
Publication Number: 1005455 Publication Date: 1986.12.03
Approval Pub. Date: 1992.05.13 Granted Pub. Date: 1992.05.13
International Classifi-cation: C03B37/01;C03B37/07;F27D7/00
Applicant(s) Name: Furukawa Electric Co., Ltd. Address:
Inventor(s) Name: Yoshimi Terune
Attorney & Agent: HUANG YIWEN
Abstract:
    A heat treating apparatus which comprises a core tube, a heating furnace, core tube gas supply means, furnace gas supply means and differential pressure detecting means. The apparatus is operated by regulating the gas pressure in the core tube so that the differential pressure between the gas pressure in the core tube and the gas pressure in the body fall within a tolerable range, thereby preventing the core tube from deforming.
Time: 10