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:
Mar. 22, 2005
Filed:
May. 15, 2001
Toshimitu Kimura, Nagoya, JP;
Tatsuomi Nakayama, Kanagawa, JP;
Hiroo Ueda, Kanagawa, JP;
Noriko Uchiyama, Kanagawa, JP;
Toshimitu Kimura, Nagoya, JP;
Tatsuomi Nakayama, Kanagawa, JP;
Hiroo Ueda, Kanagawa, JP;
Noriko Uchiyama, Kanagawa, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A steel for a high bearing pressure-resistant member, having a high machinability. The steel is formed of a machine structural steel comprising carbon in an amount ranging from 0.15 to 0.25% by weight, silicon in an amount of not less than 0.4% by weight, nickel in an amount ranging from 1 to 3% by weight, chromium in an amount ranging from 1.2 to 3.2% by weight, and molybdenum in an amount ranging from 0.25 to 2.0% by weight. The machine structural steel contains carbide precipitated under a heat treatment for spheroidizing. The carbide has an average particle size of not larger than 1 μm and the maximum particle size of not larger than 3 μm.