Title:
HEAT TREATMENT METHOD AND HEAT TREATMENT FURNACE
Document Type and Number:
WIPO Patent Application WO/2022/030193
Kind Code:
A1
Abstract:
The present disclosure pertains to a heat treatment method and a heat treatment furnace with which it is possible, in stress relieving annealing, to obtain characteristics of an equivalent level to a case in which a bluing treatment is applied, without carrying out a bluing treatment. The heat treatment method according to an embodiment is a method for performing a heat treatment in stress relieving annealing of a motor core, the heat treatment method including: an annealing step for annealing the motor core using a heat-generating metamorphic gas as an in-furnace atmosphere gas; and a cooling step for cooling the motor core obtained in the annealing step at a cooling speed exceeding 600°C per hour, in a temperature range of from the temperature in the annealing step to 500°C, using a heat-generating metamorphic gas as an in-furnace atmosphere gas.
Inventors:
SUGIYAMA MASAKI (JP)
TAKAHASHI SHINICHI (JP)
TAKAHASHI KENSUKE (JP)
TAKAHARA KOSUKE (JP)
TAKAHASHI SHINICHI (JP)
TAKAHASHI KENSUKE (JP)
TAKAHARA KOSUKE (JP)
Application Number:
PCT/JP2021/026198
Publication Date:
February 10, 2022
Filing Date:
July 12, 2021
Export Citation:
Assignee:
TOYOTA BOSHOKU KK (JP)
KANTO YAKIN KOGYO CO LTD (JP)
KANTO YAKIN KOGYO CO LTD (JP)
International Classes:
C21D9/00; F27B9/02; F27B9/04; F27B9/12; H02K15/02
Foreign References:
| US6221501B1 | 2001-04-24 | |||
| CN103060822A | 2013-04-24 | |||
| CN110863095A | 2020-03-06 | |||
| CN102586566A | 2012-07-18 | |||
| JP2016161243A | 2016-09-05 | |||
| JPS61253322A | 1986-11-11 | |||
| JP2004084053A | 2004-03-18 |
Attorney, Agent or Firm:
YAMAZAKI Akihiro (JP)
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