MULTIPLE ALLOY ROTOR SECTION, WELDED TURBINE ROTOR INCLUDING THE ROTOR SECTION, AND MANUFACTURING METHOD OF THE ROTOR

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method in which the strength or the like of a joint of a turbine rotor which is constituted by welding different materials is improved.

SOLUTION: The manufacturing method of a multiple alloy multi-section welded turbine rotor 10 includes a step of preparing a forged multiple alloy rotor section having an integral microstructure. The rotor section includes a first alloy 30 having a first alloy composition 32 and a second alloy 40 having a second alloy composition 42, and has a first weld face 34 comprising the first alloy 30 at a first end 36 and a second weld face 44 comprising the second alloy 40 at an opposed second end 46. The method also includes a step of preparing a first rotor section 50 comprising a first alloy composition 52 and a second rotor section 60 comprising a second alloy composition 62. The method also includes steps of welding the first rotor section 50 to the first weld face 34, and welding the second rotor section 60 to the second weld face 44.

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