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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.:

US 10745786 B1

PDFFull Text
Date of Patent:
Aug. 18, 2020

Filed:

Jun. 23, 2016

Iron-based sintered alloy and method for producing the same

Applicant:

The Japan Steel Works, Ltd., Tokyo, JP;

Inventors:

Yusuke Watanabe, Hiroshima, JP;

Kakeru Kusada, Hiroshima, JP;

Tetsuo Makida, Hiroshima, JP;

Youhei Sawamura, Hiroshima, JP;

Assignee:

THE JAPAN STEEL WORKS, LTD., Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Colleen P Dunn

Assistant Examiner:

Nicholas A Wang

Int. Cl.
CPC ...
C22C 38/56 (2006.01); C22C 38/44 (2006.01); C22C 38/22 (2006.01); C22C 38/36 (2006.01); C22C 33/02 (2006.01); C22C 38/14 (2006.01); B22F 1/00 (2006.01); B22F 3/04 (2006.01); B22F 3/16 (2006.01); B22F 3/24 (2006.01); B22F 9/04 (2006.01); B26F 1/44 (2006.01); C22C 38/06 (2006.01); C22C 38/50 (2006.01); C22C 38/52 (2006.01); B22F 5/00 (2006.01);
U.S. Cl.
CPC ...
C22C 38/56 (2013.01); B22F 1/0003 (2013.01); B22F 3/04 (2013.01); B22F 3/16 (2013.01); B22F 3/24 (2013.01); B22F 9/04 (2013.01); B26F 1/44 (2013.01); C22C 33/0285 (2013.01); C22C 33/0292 (2013.01); C22C 38/06 (2013.01); C22C 38/14 (2013.01); C22C 38/22 (2013.01); C22C 38/36 (2013.01); C22C 38/44 (2013.01); C22C 38/50 (2013.01); C22C 38/52 (2013.01); B22F 2003/248 (2013.01); B22F 2005/001 (2013.01); B22F 2201/20 (2013.01); B22F 2301/35 (2013.01); B22F 2302/10 (2013.01); B22F 2304/10 (2013.01); B22F 2998/10 (2013.01); B26F 2001/4436 (2013.01);
Abstract

A method for producing an iron-based sintered alloy, which is used in sliding components in pairs and has a composition including, in terms of percent by mass, Ti: 18.4 to 24.6%, Mo: 2.8 to 6.6%, C: 4.7 to 7.0%, Cr: 7.5 to 10.0%, Ni: 4.5 to 6.5%, Co: 1.5 to 4.5%, Al: 0.6 to 1.0%, the balance being Fe and unavoidable impurities, wherein the method is carried out such that the alloy has a structure in which hard particles are dispersed in an island form in a matrix and, while an area ratio thereof is kept constant, a maximum circle equivalent diameter thereof is controlled to a predetermined value of 40 to 10 μm.

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