Title:
A turbine rotor, a manufacturing method for the same, and the steam turbine using the turbine rotor concerned
Document Type and Number:
Japanese Patent JP5955125
Kind Code:
B2
Abstract:
The present invention is a turbine rotor (20) which includes: a high temperature side rotor base material (21), and a low temperature side rotor base material (22). The high temperature side rotor base material (21) and the low temperature side rotor base material (22) respectively include concavities (26, 27) and grooves. The turbine rotor (20) has an enclosed space section formed by the concavity (26) of the high temperature side rotor base material (21) and the concavity (27) of the low temperature side rotor base material (22) being disposed opposingly, and a gap formed by the groove of the high temperature side rotor base material (21) and the groove of the low temperature side rotor base material (22) being disposed opposingly. The turbine rotor (20) contains a buildup welding section (23) formed between the high temperature side rotor base material (21) and the low temperature side rotor base material (22). The buildup welding section (23) has the same composition as that of the high temperature side rotor base material (21) or the low temperature side rotor base material (22), and has a penetration bead on the enclosed space section side, and the gap contains a weld metal filled therein. Thus, a stable penetration bead can be formed in a dissimilar material welded rotor (20) combining two kinds of alloy materials different in thermal property, and then generation of a non-welded portion of a butting section that becomes a start point of fracture can be suppressed.
Inventors:
Eiji Nishioka
Kenichi Murata
Kazuhiko Endo
Jun Sato
Ikuta Hisao
Shinya Konno
Kenichi Murata
Kazuhiko Endo
Jun Sato
Ikuta Hisao
Shinya Konno
Application Number:
JP2012140472A
Publication Date:
July 20, 2016
Filing Date:
June 22, 2012
Export Citation:
Assignee:
Mitsubishi Hitachi Power Systems Co., Ltd.
International Classes:
F01D25/00; B23K9/00; B23K9/04; B23K9/167; B23K9/23; B23K9/235; B23K33/00; C22C19/05; C22C30/00; C22C38/00; C22C38/46; C22C38/52
Domestic Patent References:
| JP2008137042A | ||||
| JP2008215181A | ||||
| JP2007278064A | ||||
| JP3237205A | ||||
| JP200064805A | ||||
| JP2008151013A | ||||
| JP200850664A |
Foreign References:
| US20020081197 |
Attorney, Agent or Firm:
Polaire Patent Business Corporation