Powder material, powder material for additive manufacturing, and method for producing powder material

Patent metadata

Field	Value
Publication number	US-11713496-B2
Application number	US-201816770756-A
Country	US
Kind code	B2
Filing date	Nov 27, 2018
Priority date	Dec 19, 2017
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

The present disclosure provides a powder material that makes it possible to achieve higher flowability than before and to increase the crushing strength of particles. The powder material of the present disclosure has a dendritic structure 1 . The dendritic structure 1 has a cemented carbide composition or a cermet composition.

First claim

The invention claimed is:

1. A powder material comprising a dendritic structure, wherein
the dendritic structure has a cemented carbide composition or a cermet composition,
the cemented carbide composition includes W and carbon, the balance being at least one selected from Fe, Ni, Co, and Cr,
the cermet composition includes at least one of a Group 4 transition metal, a Group 5 transition metal, a Group 6 transition metal except for W, Al, and Si, and at least one of oxygen, carbon, and nitrogen, the balance being at least one selected from Fe, Ni, Co, and Cr, and
the powder material further comprising an uppermost surface having a film including 50 at % or more of carbon.

2. The powder material according to claim 1 , wherein the powder material includes a dendritic structure and ceramics particles.

3. The powder material according to claim 2 , wherein the ceramics particles have a polygonal shape.

4. The powder material according to claim 1 wherein the cemented carbide composition or the cermet composition contains at least 5 at % or more of at least one of a Group 4 transition metal, a Group 5 transition metal, a Group 6 transition metal, Si, and Al, and at least one of oxygen, carbon, and nitrogen.

5. The powder material according to claim 4 , wherein the cemented carbide composition or the cermet composition includes at least one of W, Ti, and Si and carbon, the balance being at least one selected from Fe, Cr, Ni, and Co.

6. The powder material according to claim 1 , wherein the film includes a layered crystal structure along a tangential direction to a surface.

7. The powder material according to claim 6 , wherein the film covers the dendritic structure.

8. The powder material according to claim 1 , wherein the film covers the dendritic structure.

9. The powder material according to claim 1 , wherein the powder material has a particle size of 10 μm or more and 200 μm or less, and a flowability of not more than 25 sec/50 g in accordance with JIS Z 2502.

10. An additive manufacturing powder material comprising the powder material according to claim 1 .

11. The powder material according to claim 1 , wherein the powder material has a particle size of 10 μm or more and 200 μm or less, and a flowability of not more than 25 sec/50 g in accordance with JIS Z 2502.

12. An additive manufacturing powder material comprising the powder material according to claim 1 .

13. A method of manufacturing the powder material according to claim 1 , the method comprising:
a raw material mixing step of obtaining a mixture by wet-mixing, as raw materials, ceramics fine particles, metal or alloy fine particles, and wax;
a granulation step of producing mixture particles by granulation by atomizing and drying the mixture;
a sintering step of debinding a powder of the mixture particles and then sintering the powder at a sintering temperature higher than or equal to 1000° C.; and
a high-temperature processing step of causing all or some of the mixture particle powder solidified in the sintering step to be instantaneously melted and solidified by thermal plasma-droplet-refining.

14. A powder material comprising a cemented carbide composition or a cermet composition, wherein
the cemented carbide composition includes W and carbon, the balance being at least one selected from Fe, Ni, Co, and Cr,
the cermet composition includes at least one of a Group 4 transition metal, a Group 5 transition metal, a Group 6 transition metal except for W, Al, and Si, and at least one of oxygen, carbon, and nitrogen, the balance being at least one selected from Fe, Ni, Co, and Cr, and
the powder material has an uppermost surface having a film including 50 at % or more of carbon.

15. The powder material according to claim 14 , wherein the cemented carbide composition or the cermet composition contains at least 5 at % or more of at least one of a Group 4 transition metal, a Group 5 transition metal, a Group 6 transition metal, Si, and Al, and at least one of oxygen, carbon, and nitrogen.

16. The powder material according to claim 15 , wherein the cemented carbide composition or the cermet composition includes at least one of W, Ti, and Si and carbon, the balance being at least one selected from Fe, Cr, Ni, and Co.

Assignees

• Proterial Ltd

Inventors

• Kawanaka Hirotsugu
• Shiratori Hiroshi
• Koseki Shuho
• Furuya Tadashi
• Han Gang
• Nakamura Kiyomi

Classifications

• B33Y40/10

  Pre-treatment · CPC title

• B22F10/34

  of powder characteristics, e.g. density, oxidation or flowability · CPC title

• C22C29/065 Primary

  based on SiC · CPC title

• B22F1/06

  Metallic powder characterised by the shape of the particles (nanosized particles B22F1/054) · CPC title

• B22F1/10

  Metallic powder containing lubricating or binding agents; Metallic powder containing organic material · CPC title