Patent ID: 9631635
Date: 2017-04-25
CPC Classifications: B22F,F01D,F04D,F05D,Y02T

Claim:
1. A method of manufacturing an axial flow compressor blade unit comprising a platform section and an airfoil section, the axial flow compressor blade unit arranged on a circumference about an axis of a compressor, the method comprising: a green body forming step, and a sintered body forming step relying on a metal injection molding, wherein: during the green body forming step, from a metal powder including a Fe-based powdery alloy of Fe—Cr—Co system or Fe—Cr—Ni system, a green body including a platform shaped portion corresponding to the platform section and an airfoil shaped portion corresponding to the airfoil section are formed, which airfoil section includes an inner diametric surface segment inwardly of the circumference, an outer diametric surface segment outwardly of the circumference, two annular side surface segments extending in a circumferential direction, two axially side surface segments extending in an axial direction, and a coupling portion formed in each of the annular side surface segments so as to extend in the circumferential direction, the coupling portion being of a shape projecting or recessed in the axial direction; and during the sintered body forming step, a powdered metal forming the green body is sintered to form a powdery metal sintered body having a shape corresponding to the axial flow compressor blade unit, thereby to form the axial flow compressor blade unit including the platform section and the airfoil section formed integrally with each other and having a powdered metal sintered structure, further comprising: