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. 11, 2021
Filed:
Mar. 06, 2020
Nissan Motor Co., Ltd., Yokohama, JP;
Tsuyoshi Sugimoto, Kanagawa, JP;
Ryosuke Hiraishi, Kanagawa, JP;
Kenji Yasui, Kanagawa, JP;
Yukichi Okayama, Kanagawa, JP;
Kei Tanaka, Kanagawa, JP;
Takeshi Oshio, Kanagawa, JP;
NISSAN MOTOR CO., LTD., Yokohama, JP;
Abstract
A heat treatment method is provided in which a first steel component () formed with a coating () thereon is fitted in first holes () of a second steel component () subjected to a quenching treatment. The heat treatment method includes a heating step of heating the second steel component to a first temperature (T) equal to or higher than a tempering temperature (T) of the second steel component and higher than a temperature of the first steel component by a temperature difference (ΔT) for achieving shrink fitting and a shrink-fitting step of shrink-fitting the first steel component in the first holes of the second steel component in a state of maintaining the temperature difference for achieving shrink fitting between the first steel component and the second steel component.