The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2025
Filed:
Jan. 18, 2022
Toyota Boshoku Kabushiki Kaisha, Kariya, JP;
Kanto Yakin Kogyo Co., Ltd., Hiratsuka, JP;
Masaki Sugiyama, Kariya, JP;
Shinichi Takahashi, Hiratsuka, JP;
Kensuke Takahashi, Hiratsuka, JP;
Kosuke Takahara, Hiratsuka, JP;
TOYOTA BOSHOKU KABUSHIKI KAISHA, Kariya, JP;
KANTO YAKIN KOGYO CO., LTD., Hiratsuka, JP;
Abstract
The present disclosure relates to a heat treatment method and a heat treatment furnace that enable characteristics on an equal level to those when bluing processing is performed to be obtained without the bluing processing being performed in stress-relief annealing of a motor core. A heat treatment method according to one aspect is a heat treatment method in stress-relief annealing of a motor core. The heat treatment method includes an annealing step of annealing the motor core by using an exothermic converted gas as a furnace atmospheric gas, and a cooling step of cooling the motor core obtained in the annealing step, by using an exothermic converted gas as a furnace atmospheric gas, in a temperature range from a temperature in the annealing step to 500° C. at a cooling rate exceeding 600° C. per hour.