Title:
【発明の名称】再溶融硬化処理方法及びその装置
Document Type and Number:
Japanese Patent JP3036648
Kind Code:
B2
Abstract:
Remelting/hardening treatment is carried out for a work by a remelting/hardening treatment apparatus including a torch for heating the work. First, the work is firmly placed in position in the remelting/hardening treatment apparatus and a temperature of the work is then measured by a temperature detector. When the measured temperature is lower than a lower limit temperature of a predetermined or particular temperature range, a level of output from the torch is lowered and a part of the work other than a part thereof to be treated is then preheated by the torch. Thereafter, the part of the work to be treated is subjected to remelting and hardening with the aid of the torch. Consequently, production of unacceptable works can be prevented reliably, since remelting/hardening treatment is not carried out at all while the measured temperature is lower than the predetermined or particular temperature range. Alternatively, a preheating operation is performed by the torch while an insufficiently preheated work is placed in position in the remelting/hardening apparatus. After completion of the preheating operation, the work is subjected to remelting and hardening in the same manner as mentioned above.
Inventors:
Hiroaki Kusunoki
Application Number:
JP8445891A
Publication Date:
April 24, 2000
Filing Date:
March 26, 1991
Export Citation:
Assignee:
Mazda Corporation Inc
International Classes:
C21D1/09; C21D9/30; (IPC1-7): C21D1/09; C21D9/30
Domestic Patent References:
| JP42728A | ||||
| JP6123845B2 |
Attorney, Agent or Firm:
Kensuke Isshiki (1 person outside)