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1. (WO2016056654) METHOD FOR MANUFACTURING SHAFT BODY

Pub. No.:    WO/2016/056654    International Application No.:    PCT/JP2015/078789
Publication Date: Fri Apr 15 01:59:59 CEST 2016 International Filing Date: Sat Oct 10 01:59:59 CEST 2015
IPC: F01D 5/06
B23K 9/00
B23K 9/235
B23K 31/00
C21D 9/00
C21D 9/28
C21D 9/50
F01D 25/00
Applicants: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
三菱日立パワーシステムズ株式会社
Inventors: HIRAKAWA Yuichi
平川 裕一
FUKUSHIMA Hiroaki
福島 寛明
NISHIMOTO Shin
西本 慎
ENDO Hiroyuki
遠藤 裕之
Title: METHOD FOR MANUFACTURING SHAFT BODY
Abstract:
A method for manufacturing a shaft body by welding multiple shaft members together, said method comprising: a primary tempering step, carried out before the shaft members are welded together, for subjecting at least one of the shaft members to tempering wherein a region thereof in the vicinity of an end of another shaft member adjacent thereto is tempered such that the strength of the end side of that region is lower than the strength of the opposite side of that region from the end side; a welding step for welding the shaft members after the primary tempering step; and a secondary tempering step for tempering the vicinity of the weld part between the shaft members after the welding step.