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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 10058922 B1

PDFFull Text
Date of Patent:
Aug. 28, 2018

Filed:

Jul. 31, 2015

Compact for producing a sintered alloy, a wear-resistant iron-based sintered alloy, and a method for producing the same

Applicants:

Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;

Fine Sinter Co., Ltd., Kasugai-shi, Aichi, JP;

Sanyo Special Steel Co., Ltd., Himeji-shi, Hyogo, JP;

Inventors:

Nobuyuki Shinohara, Tajimi, JP;

Kimihiko Andou, Toyota, JP;

Yoshihisa Ueda, Kasugai, JP;

Yusaku Yoshida, Tajimi, JP;

Masaru Sugimoto, Tajimi, JP;

Toshiyuki Sawada, Himeji, JP;

Shingo Fukumoto, Himeji, JP;

Assignees:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi, JP;

FINE SINTER CO., LTD, Kasugai-shi, Aichi, JP;

SANYO SPECIAL STEEL CO., LTD, Himeji-shi, Hyogo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Colleen P Dunn

Assistant Examiner:

Rajinder Bajwa

Int. Cl.
CPC ...
B22F 3/12 (2006.01); C22C 33/02 (2006.01); C22C 38/04 (2006.01); C22C 38/22 (2006.01); C22C 38/36 (2006.01); C22C 38/38 (2006.01);
U.S. Cl.
CPC ...
B22F 3/12 (2013.01); C22C 33/0207 (2013.01); C22C 33/0257 (2013.01); C22C 38/04 (2013.01); C22C 38/22 (2013.01); C22C 38/36 (2013.01); C22C 38/38 (2013.01); B22F 2998/10 (2013.01);
Abstract

The object of the present invention is to provide a compact for producing a sintered alloy which allows a sintered alloy obtained by sintering the compact to have improved mechanical strength and wear resistance, a wear-resistant iron-based sintered alloy, and a method for producing the same. The wear-resistant iron-based sintered alloy is produced by: forming a compact for producing a sintered alloy from a powder mixture containing a hard powder, a graphite powder, and an iron-based powder by powder compacting; and sintering the compact for producing a sintered alloy while diffusing C in the graphite powder of the compact for producing a sintered alloy in hard particles that constitute the hard powder. The hard particles contain 10% to 50% by mass of Mo, 3% to 20% by mass of Cr, and 2% to 15% by mass of Mn, with the balance made up of incidental impurities and Fe, and the hard powder and the graphite powder contained in the powder mixture account for 5% to 60% by mass and 0.5% to 2.0% by mass of the total amount of the hard powder, the graphite powder, and the iron-based powder, respectively.

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