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:
Mar. 07, 2017
Filed:
Mar. 29, 2013
Applicant:
Kobe Steel, Ltd., Kobe-shi, JP;
Inventors:
Sayaka Nagamatsu, Kobe, JP;
Yosuke Shindo, Kobe, JP;
Assignee:
Kobe Steel, Ltd., Kobe-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C 38/18 (2006.01); C22C 38/40 (2006.01); C22C 38/22 (2006.01); F16C 33/12 (2006.01); C21D 9/32 (2006.01); C21D 1/06 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/38 (2006.01); C23C 8/34 (2006.01); C23C 8/80 (2006.01); C10M 103/06 (2006.01); C21D 6/00 (2006.01); C21D 6/02 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/42 (2006.01); C22C 38/58 (2006.01); C23C 8/26 (2006.01); F16H 57/00 (2012.01); F16H 57/04 (2010.01); F16H 55/06 (2006.01);
U.S. Cl.
CPC ...
C21D 9/32 (2013.01); C10M 103/06 (2013.01); C21D 1/06 (2013.01); C21D 6/002 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 6/02 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C22C 38/38 (2013.01); C22C 38/42 (2013.01); C22C 38/58 (2013.01); C23C 8/26 (2013.01); C23C 8/34 (2013.01); C23C 8/80 (2013.01); F16H 57/00 (2013.01); F16H 57/041 (2013.01); C21D 2211/001 (2013.01); C21D 2211/002 (2013.01); C21D 2211/004 (2013.01); C21D 2211/008 (2013.01); F16H 55/06 (2013.01);
Abstract
This gear has a predetermined chemical composition and has, in a surface-layer part, a texture of tempered martensite and/or tempered bainite and a steel material texture in which retained austenite exists in 1-10% by area percentage and in which a carbide is deposited in at least 5% by area percentage, and the nitrogen content at a depth of 20 μm below the surface is 2.0-6.0%. Thus, a gear that achieves even better seizing resistance in a power transmission part subjected to high rotation and high slippage and using a low-kinematic-viscosity lubricating oil is provided.