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:
Jan. 19, 2021
Filed:
Jan. 16, 2019
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Hiroyoshi Tawa, Okazaki, JP;
Hiroyuki Inoue, Aichi-gun, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A method for producing a steel member includes carburizing the steel member, pearlitizing austenite, and performing quenching. The pearlitizing of the austenite includes performing a first pearlite precipitation treatment of cooling the steel member to a first temperature lower than an austenite transformation start temperature and higher than 680° C. and holding the steel member at the first temperature to pearlitize a part of the austenite formed in the carburizing of the steel member, and performing a second pearlite precipitation treatment of further cooling the steel member to a second temperature equal to or lower than 680° C. and higher than a nose temperature and holding the steel member at the second temperature to pearlitize the austenite retained in the first pearlite precipitation treatment.