Patent ID: 9598962
Date: 2017-03-21
CPC Classifications: B23K,B23P,F01D

Claim:
1. A turbine rotor comprising: a high temperature side rotor base material; and a low temperature side rotor base material, the high temperature side rotor base material and the low temperature side rotor base material respectively including concavities and grooves, the turbine rotor having an enclosed space section formed by the concavity of the high temperature side rotor base material and the concavity of the low temperature side rotor base material being disposed opposingly, and a gap formed by the groove of the high temperature side rotor base material and the groove of the low temperature side rotor base material being disposed opposingly, the turbine rotor containing a buildup welding section formed between the high temperature side rotor base material and the low temperature side rotor base material, wherein the buildup welding section has the same composition as that of the high temperature side rotor base material or the low temperature side rotor base material, and has a penetration bead on the enclosed space section side, and the gap contains a weld metal filled therein; and wherein a ratio of a thermal conductivity of the high temperature side rotor base material and the low temperature side rotor base material is in the range of 2/3 to 3/2.