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:
Oct. 18, 2011
Filed:
Mar. 21, 2008
Hitoshi Tanino, Toyota, JP;
Kimihiko Ando, Toyota, JP;
Shinya Omura, Aichi, JP;
Toshitake Miyake, Nagoya, JP;
Mikio Kondoh, Toyoake, JP;
Nobuhiko Matsumoto, Seto, JP;
Hitoshi Tanino, Toyota, JP;
Kimihiko Ando, Toyota, JP;
Shinya Omura, Aichi, JP;
Toshitake Miyake, Nagoya, JP;
Mikio Kondoh, Toyoake, JP;
Nobuhiko Matsumoto, Seto, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
There is provided an iron-based sintered material resistant to the metal fatigue developing from the voids therein functioning as the initial points and improved in the strength and machinability thereof. An iron-based sintered material, including a mixed structure of martensite, bainite, and pearlite and multiple voids formed in the mixed structure, wherein the ratio of martensite and bainite in the mixed structure is 70% or more; the ratio of martensite and/or bainite in the mixed structure forming the void surface is 90% or more; and the density of the iron-based sintered material is 7.4 g/cmor more.