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:
Dec. 09, 2025
Filed:
Sep. 17, 2020
Applicant:
Sumitomo Electric Sintered Alloy, Ltd., Okayama, JP;
Inventor:
Chihiro Takenaka, Okayama, JP;
Assignee:
SUMITOMO ELECTRIC SINTERED ALLOY, LTD., Okayama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 38/44 (2006.01); B22F 1/00 (2022.01); C21D 6/00 (2006.01); C22C 33/02 (2006.01);
U.S. Cl.
CPC ...
C22C 38/44 (2013.01); B22F 1/00 (2013.01); C21D 6/004 (2013.01); C22C 33/0257 (2013.01); C21D 2211/001 (2013.01); C21D 2211/008 (2013.01);
Abstract
A sintered member including Fe as a main component thereof, includes a composition including Ni, Cr, Mo, and C, and a remainder including Fe and inevitable impurities, and a mixed-phase composition including a martensite phase and a residual austenite phase, wherein a Ni-content occupying the sintered member is larger than 2 mass % and less than or equal to 6 mass %, when a total content of elements included in the sintered member is regarded as 100 mass %, and a variation width of a Vickers hardness from a surface to a predetermined depth of the sintered member is less than or equal to 100 HV.