Title:
NI-BASED ALLOY SOFTENED POWDER, AND METHOD FOR PRODUCING SAID SOFTENED POWDER
Document Type and Number:
WIPO Patent Application WO/2020/110326
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing: a Ni-based alloy softening powder which is a powder having better shaping processability/molding processability than before in spite of the fact that the powder is produced using a strongly precipitation-hardened Ni-based alloy material, and which is suitable for a powder metallurgy technique; and a method for producing the softened powder. The Ni-based alloy softened powder according to the present invention is a powder which has such a chemical composition that the equilibrium precipitation amount of a γ' phase precipitated in a γ phase that serves as a matrix phase becomes 30 to 80% by volume at 700°C, and has an average grain size of 5 to 500 μm, wherein each of grains of the softened powder is formed from a polycrystalline body of microcrystals of the γ phase, the powder being characterized in that the γ' phase is precipitated in an amount of 20% by volume or more on the grain boundaries of the microcrystals of the γ phase which constitute the grains, and the Vickers hardness of the grains at room temperature is 370 Hv or less.
Inventors:
OTA ATSUO (JP)
IMANO SHINYA (JP)
IMANO SHINYA (JP)
Application Number:
PCT/JP2019/003833
Publication Date:
June 04, 2020
Filing Date:
February 04, 2019
Export Citation:
Assignee:
MITSUBISHI HITACHI POWER SYS (JP)
International Classes:
B22F9/20; B22F1/05; B22F1/142; B22F5/04; C22C19/05
Domestic Patent References:
| WO2016053489A2 | 2016-04-07 |
Foreign References:
| JP2016003374A | 2016-01-12 | |||
| US5061324A | 1991-10-29 | |||
| JPH09302450A | 1997-11-25 | |||
| JP5869624B2 | 2016-02-24 | |||
| US5649280A | 1997-07-15 |
Other References:
See also references of EP 3685942A4
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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