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:
Jul. 16, 2013
Filed:
Jun. 09, 2006
Hideyuki Arikawa, Mito, JP;
Akira Mebata, Kitaibaraki, JP;
Masahiko Arai, Hitachinaka, JP;
Yoshitaka Kojima, Hitachi, JP;
Haijime Toriya, Hitachi, JP;
Hideyuki Arikawa, Mito, JP;
Akira Mebata, Kitaibaraki, JP;
Masahiko Arai, Hitachinaka, JP;
Yoshitaka Kojima, Hitachi, JP;
Haijime Toriya, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A steam turbine rotor shaft and method of manufacturing the same are provided wherein the sliding characteristics of a journal are improved, and the journal is free from welding cracks and does not need a post heat treatment. The low alloy steel coating layer having better sliding characteristics than 9 to 13% Cr heat resisting steel and an area rate of defects including pores and oxides in a range of 3 to 15% is formed by a high velocity flame spray coating method on a sliding surface of the journal.