Metal powder composed of spherical particles

Patent metadata

Field	Value
Publication number	US-10350680-B2
Application number	US-201615562600-A
Country	US
Kind code	B2
Filing date	Mar 24, 2016
Priority date	Mar 31, 2015
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

A problem to be solved is to provide a metal powder having a variety of excellent performances, and, in order to solve such a problem, the present invention provides a metal powder that is composed of many spherical particles; that includes at least one of Ni, Fe, and Co, in which the total content (T.C.) of the Ni, the Fe, and the Co is 50 mass % or more; that has a cumulative 10 vol % particle size D10 of 1.0 μm or more; and in which a value Y is 7.5 to 24.0 as calculated by the following mathematical equation: Y=D50×ρ×S, where D50 represents a cumulative 50 vol % particle size of the powder, ρ represents a true density of the powder, and S represents a specific surface area of the powder.

First claim

The invention claimed is:

1. A metal powder composed of many spherical particles, the metal powder comprising at least one of Ni, Fe, and Co,
wherein the total content (T.C.) of the Ni, the Fe, and the Co is 50 mass % or more,
wherein the metal powder has a cumulative 10 vol % particle size D10 of 1.0 μm or more,
wherein a ratio P2 of the number of particles having a circularity of 0.95 or more to the total number of the particles is 50% or more, and
wherein a value Y is 7.5 to 24.0 as calculated by the following mathematical equation:
Y=D 50 (m)×ρ (kg/m 3 )× S (m 2 /kg)

wherein D50 (m) represents a cumulative 50 vol % particle size of the powder, ρ (kg/m 3 ) represents a true density of the powder, and S (m 2 /kg) represents a specific surface area of the powder.

2. The powder according to claim 1 , wherein the balance other than the three kinds that are Ni, Fe, and Co comprises: at least one of C, Si, Cr, Mo, Al, Ti, V, W, Nb, Zn, Ta, B, Ag, Cu, and Sn; and an unavoidable impurity.

3. The powder according to claim 2 , wherein a ratio of a cumulative 60 vol % particle size D60 to the particle size D10 (D60/D10) is 1.0 or more and less than 10.0.

4. The powder according to claim 3 , wherein a ratio of the particle size D50 to a mode diameter Dm (D50/Dm) is 0.80 to 1.20.

5. The powder according to claim 4 , wherein the ratio P2 is 80% or more.

6. The powder according to claim 3 , wherein the ratio P2 is 80% or more.

7. The powder according to claim 2 , wherein a ratio of the particle size D50 to a mode diameter Dm (D50/Dm) is 0.80 to 1.20.

8. The powder according to claim 7 , wherein the ratio P2 is 80% or more.

9. The powder according to claim 2 , wherein the ratio P2 is 80% or more.

10. The powder according to claim 1 , wherein a ratio of a cumulative 60 vol % particle size D60 to the particle size D10 (D60/D10) is 1.0 or more and less than 10.0.

11. The powder according to claim 10 , wherein a ratio of the particle size D50 to a mode diameter Dm (D50/Dm) is 0.80 to 1.20.

12. The powder according to claim 11 , wherein the ratio P2 is 80% or more.

13. The powder according to claim 10 , wherein the ratio P2 is 80% or more.

14. The powder according to claim 1 , wherein a ratio of the particle size D50 to a mode diameter Dm (D50/Dm) is 0.80 to 1.20.

15. The powder according to claim 14 , wherein the ratio P2 is 80% or more.

16. The powder according to claim 1 , wherein the ratio P2 is 80% or more.

17. The powder according to claim 1 , having an oxygen concentration of less than 1000 ppm.

18. The powder according to claim 1 , wherein a flow rate is less than 35.0 s/50 g.

19. The powder according to claim 1 , wherein a cumulative 60 vol % particle size D60 is 50.0 μm or more.

Assignees

• Sanyo Special Steel Co Ltd
• Sanyo Specia Steel Co Ltd

Inventors

• Yamamoto Takahisa
• Kariya Tetsuro

Classifications

• B22F10/20

  Direct sintering or melting · CPC title

• C22C38/16

  containing copper · CPC title

• C22C38/06

  containing aluminium · CPC title

• C22C38/12

  containing tungsten, tantalum, molybdenum, vanadium, or niobium · CPC title

• B22F2301/15

  Nickel or cobalt · CPC title