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:
Aug. 18, 2015
Filed:
Jul. 15, 2009
Takashi Shige, Hyogo, JP;
Shin Nishimoto, Tokyo, JP;
Kimmitsu Maruyama, Tokyo, JP;
Kenji Kawasaki, Hyogo, JP;
Yoshiaki Fukunaga, Hyogo, JP;
Takashi Nakano, Tokyo, JP;
Takashi Shige, Hyogo, JP;
Shin Nishimoto, Tokyo, JP;
Kimmitsu Maruyama, Tokyo, JP;
Kenji Kawasaki, Hyogo, JP;
Yoshiaki Fukunaga, Hyogo, JP;
Takashi Nakano, Tokyo, JP;
MITSUBISHI HITACHI POWER SYSTEMS, LTD., Kanagawa, JP;
Abstract
A turbine rotor has suitable strength and toughness without causing soaring manufacturing costs and prolonged manufacturing time. The turbine rotor is constructed by welding a rotor member for high temperature made of high Cr steel to a rotor member for low temperature made of low Cr steel. The high temperature rotor member is formed from high Cr steel of which the nitrogen content is 0.02% or higher by mass %. A filler material welds the high temperature rotor member and the low temperature rotor member together, and is a 9% Cr-based filler material of which the nitrogen content is 0.025% or lower by mass %.