TITANIUM-BASED POWDER, AND INGOT AND SINTERED ARTICLE THEREOF

• US 20180021854A1
• Filed: 02/17/2016
• Published: 01/25/2018
• Est. Priority Date: 03/05/2015
• Status: Active Grant

• Current Assignee: TOHO Titanium Company Limited (ENEOS Holdings, Inc.)
• Original Assignee: TOHO Titanium Company Limited (ENEOS Holdings, Inc.)
• Inventors: FUKADA, Nobuo, KANOU, Osamu, TAKENAKA, Shigehisa
• Granted Patent: US 10,442,000 B2
• Time in Patent Office: Days
• CPC Class Codes: B22F 1/00 Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
• CPC Class Codes: B22F 1/065 Spherical particles
• CPC Class Codes: B22F 10/18 by mixing binder with metal in filament form, e.g. fused filament fabrication [FFF]
• CPC Class Codes: B22F 10/20 Direct sintering or melting
• CPC Class Codes: B22F 10/28 Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• CPC Class Codes: B22F 9/04 starting from solid material, e.g. by crushing, grinding or milling C22C1/1084 takes precedence; crushing, grinding or milling, in general, see the relevant subclasses, e.g. B02C
• CPC Class Codes: B22F 9/08 by casting, e.g. through sieves or in water, by atomising or spraying using electric discharge B22F9/14
• CPC Class Codes: B22F 9/082 atomising using a fluid using centrifugal force B22F9/10
• CPC Class Codes: B22F 9/10 using centrifugal force
• CPC Class Codes: C22C 1/0458 Alloys based on titanium, zirconium or hafnium
• CPC Class Codes: Y02P 10/25 Process efficiency

Abstract

Provided are a titanium-based powder excellent in fluidity and shape retention property, and an ingot and a sintered article obtained using the titanium-based powder as a material. The titanium-based powder has an average circularity of 0.815 or more and less than 0.870, a CV value of particle sizes of 22 or more and 30 or less, and an angle of repose of 29 degrees or more and 36 degrees or less.

Claims

1. A titanium-based powder, which has an average circularity of 0.815 or more and less than 0.870, a CV value of particle sizes of 22 or more and 30 or less, and an angle of repose of 29 degrees or more and 36 degrees or less.

2. The titanium-based powder according to claim 1, which is a titanium-based powder containing a spherical titanium-based powder and a non-spherical titanium-based powder.

3. The titanium-based powder according to claim 1, which contains spherical titanium-based particles in a number ratio of 35% to 80%, and contains non-spherical titanium-based particles in a number ratio of 20% to 65%.

4. The titanium-based powder according to claim 2, which is a titanium-based powder obtained by mixing a spherical titanium-based powder and a non-spherical titanium-based powder.

5. The titanium-based powder according to claim 4, wherein the spherical titanium-based powder is a titanium-based powder produced by an atomization method, a titanium-based powder produced by a P-REP method, a titanium-based powder obtained by subjecting a titanium-based powder produced by an HDH method to a plasma processing, a titanium-based powder obtained by subjecting a titanium-based powder produced by a pulverization method to a plasma processing, or a titanium-based powder obtained by mixing two or more thereof.

6. The titanium-based powder according to claim 4, wherein the non-spherical titanium-based powder is a titanium-based powder produced by an HDH method, a titanium-based powder produced by a pulverization method, or a titanium-based powder obtained by mixing the foregoing powders.

7. An ingot, which is obtained by melting a powder containing the titanium-based powder as set forth in claim 1.

8. A sintered article, which is obtained by sintering a powder containing the titanium-based powder as set forth in claim 1.