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:
Oct. 01, 2019
Filed:
Jun. 24, 2014
Applicant:
Daido Steel Co., Ltd., Nagoya-shi, Aichi, JP;
Inventors:
Kyohei Nakayama, Aichi, JP;
Yasuaki Sakai, Aichi, JP;
Toshiyuki Morita, Aichi, JP;
Keisuke Inoue, Aichi, JP;
Assignee:
DAIDO STEEL CO., LTD., Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C 8/22 (2006.01); C21D 9/28 (2006.01); C21D 9/32 (2006.01); C21D 9/40 (2006.01); C22C 38/60 (2006.01); C21D 9/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01); C21D 1/06 (2006.01);
U.S. Cl.
CPC ...
C23C 8/22 (2013.01); C21D 9/0068 (2013.01); C21D 9/28 (2013.01); C21D 9/32 (2013.01); C21D 9/40 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01); C22C 38/60 (2013.01); C21D 1/06 (2013.01); C21D 2211/004 (2013.01);
Abstract
The present invention provides a carburized part having a total amount of TiC, AlN and ZrC, which are precipitate particles, of 4.5×10mole or less per 1 mmof grain boundary area of prior austenite grains after carburization. According to the present invention, it is possible to provide a carburized part which allows effective inhibition of abnormal grain growth in spite of a carburizing treatment and makes it possible to solve the problem of reduction in properties caused by abnormal grain growth.