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:
Feb. 14, 2017
Filed:
Sep. 23, 2011
Applicants:
Tomoyuki Kohida, Matsudo, JP;
Katsuhiko Ueda, Matsudo, JP;
Kenzou Morita, Matsudo, JP;
Inventors:
Assignee:
HITACHI POWDERED METALS CO., LTD., Matsudo-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22F 3/16 (2006.01); B22F 3/17 (2006.01); B22F 5/08 (2006.01); B21J 5/00 (2006.01); B22F 3/24 (2006.01); C21D 7/06 (2006.01); C22C 38/04 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/22 (2006.01); B21K 1/30 (2006.01);
U.S. Cl.
CPC ...
B21J 5/002 (2013.01); B21K 1/30 (2013.01); B22F 3/16 (2013.01); B22F 3/17 (2013.01); B22F 3/24 (2013.01); B22F 5/08 (2013.01); C21D 7/06 (2013.01); C22C 38/04 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/22 (2013.01); B22F 2998/00 (2013.01); B22F 2998/10 (2013.01); C22C 2202/02 (2013.01);
Abstract
A production method for a sintered member includes preparing a raw powder, compacting the raw powder into a green compact having pores at the surface thereof, and sintering the green compact into a sintered compact. The production method also includes sealing the pores exposed at the surface of the sintered compact by at least one of plastically deforming and melting the surface of the sintered compact. The production method further includes forging the sintered compact by using a lubricant after the sealing.