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US 2026/0308734 A1Published application
Fe-BASED ALLOY POWDER AND MIXED POWDER
AssigneeDaido Steel Co., Ltd.
InventorsIwane NAGASE, Yuki NISHIDA
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Abstract
An Fe-based alloy powder including: C≤0.04 mass %; 0.3 mass %≤Si≤1.5 mass %; 2.5 mass %≤Cr≤13.5 mass %; 0.4 mass %≤Mo≤10.0 mass %; 0 mass %≤W≤10.0 mass %; 0.3 mass %≤V≤3.4 mass %; and 0 mass %≤Co≤10.0 mass %, with the balance being Fe and unavoidable impurities, in which the Fe-based alloy powder has an average particle diameter D50 of 20 μm or more and 50 μm or less and an average circularity of 0.6 or more and 0.8 or less.
Claims10
An Fe-based alloy powder comprising:
- C
- ≤
- 0.04
- mass
-
- %
- ;
- 0.3
- mass
-
- %
- ≤
- Si
- ≤
- 1.5
- mass
-
- %
- ;
- 2.5
- mass
-
- %
- ≤
- Cr
- ≤
- 13.5
- mass
-
- %
- ;
- 0.4
- mass
-
- %
- ≤
- Mo
- ≤
- 10.
- mass
-
- %
- ;
- W
- ≤
- 10.
- mass
-
- %
- ;
- 0.3
- mass
-
- %
- ≤
- V
- ≤
- 3.4
- mass
-
- %
- ;
- and
- Co
- ≤
- 10.
- mass
-
- %
- ,
- with the balance being Fe and unavoidable impurities, wherein
- the Fe-based alloy powder has an average particle diameter D50 of 20 μm or more and 50 μm or less and an average circularity of 0.6 or more and 0.8 or less, and
- wherein
- the “average particle diameter D50” indicates a median diameter in a number-based cumulative particle size distribution measured by a laser diffraction scattering method,
- the “average circularity” indicates an arithmetic mean of circularities e measured for a total of 11 particles having a particle diameter, which is equivalent circle diameter, of (average particle diameter D50±i μm)
- where i is an integer of 0 or more and 5 or less, and
- the “circularity e” indicates a value represented by the following equation (1):
- e
- =
- 4
-
- π
-
- S
- /
- L
- 2
- (
- 1
- )
- where
- S is an area of a particle image when the particle is observed by a microscope, and
- L is a perimeter of the particle image.
90 more elements
Dependencies are inferred from the claim text.