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. 18, 2016
Filed:
Aug. 30, 2013
Nippon Steel & Sumitomo Metal Corporation, Chiyoda-Ku, Tokyo, JP;
Sanyo Special Steel Co., Ltd., Himeji-shi, Hyogo, JP;
Shuji Kozawa, Tokyo, JP;
Manabu Kubota, Tokyo, JP;
Osamu Kada, Tokyo, JP;
Motohiro Nishikawa, Himeji, JP;
Takashi Tanaka, Himeji, JP;
Norimasa Tsunekage, Himeji, JP;
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
SANYO SPECIAL STEEL CO., LTD., Himeji-shi, JP;
Abstract
A carburized steel part having excellent low cycle bending fatigue strength which is comprised of a steel material which contains, by mass %, C: 0.1 to 0.6%, Si: 0.01 to 1.5%, Mn: 0.3 to 2.0, P: 0.02% or less, S: 0.001 to 0.15%, N: 0.001 to 0.03%, Al: 0.001 to 0.06%, and O: 0.005% or less and has a balance of substantially iron and unavoidable impurities and which is carburized and quenched, and then tempered, which steel part has a surface hardness of HV550 to HV800 and a core hardness of HV400 to HV500.