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:
Feb. 25, 2020
Filed:
Nov. 05, 2015
Mitsubishi Hitachi Power Systems, Ltd., Kanagawa, JP;
Soichiro Tabata, Kanagawa, JP;
Yuki Enomoto, Kanagawa, JP;
Naoto Tochitani, Kanagawa, JP;
Shunji Imai, Kanagawa, JP;
Takayuki Kurimura, Tokyo, JP;
Naotoshi Okaya, Kanagawa, JP;
Yuta Okimori, Kanagawa, JP;
Haruhiko Asaka, Kanagawa, JP;
MITSUBISHI HITACHI POWER SYSTEMS, LTD., Kanagawa, JP;
Abstract
A steam turbine rotor blade for forming a turbine rotor cascade of a steam turbine includes a rotor blade main body having a blade portion, a blade base portion and a first coupling portion, which has first facing surfaces, provided on opposite end sides of the blade portion, and a second coupling portion provided in an intermediate portion of the blade portion and having second facing surfaces. The steam turbine rotor blade also includes a coating layer which is made of a Co-based alloy having a single composition on a surface of at least one of the first and second facing surfaces with a diffusion layer having a thickness of 10 μm or less provided between the coating layer and the surface.