METHOD FOR MANUFACTURING COBALT-BASED ALLOY STRUCTURE, AND COBALT-BASED ALLOY STRUCTURE OBTAINED THEREBY
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United States of America
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May 5, 2022
app pub date -
Aug 31, 2021
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Aug 31, 2021
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Abstract
In order to stably produce a structured article made of a metal with a complex shape, such as a turbine stator blade, while securing a sufficient mechanical strength, there is provided a method for manufacturing a cobalt-based alloy structure, the cobalt-based alloy structure including a first structure region comprising a hollow space and a second structure region filled in the hollow space. The method includes the steps of: forming the first structure region by additive manufacturing from a first cobalt-based alloy powder having a particle size distribution within a range of 5-85 μm and in D90 within a range of 40-80 μm; and forming the second structure region in the hollow space by hot isostatic pressing, the hollow space being filled with a second cobalt-based alloy powder with a particle size distribution within a range of 5-85 μm and in D90 within a range of 40-80 μm.
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