Title:
SPHERICAL TI-BASED POWDER AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/124047
Kind Code:
A1
Abstract:
The present invention provides: a spherical Ti-based powder which can be molded into a near-net shape and which is suitable for three-dimensional lamination molding by means of electron beams, laser beams, or the like; and a manufacturing method said spherical Ti-based powder. This spherical Ti-based powder has a 50% particle size (D50) of 1-250 μm in in cumulative particle size distribution based on volume, wherein the total amount of oxygen and hydrogen is less than 3000 ppm by mass, and the area failure rate in a cross-section of the spherical Ti-based powder is less than 0.100%. The area-based circularity of the spherical Ti-based powder in a secondary projection image is more preferably at least 0.9. The spherical Ti-based powder can be obtained by subjecting a pulverized Ti-based powder to a melting and solidification treatment using a thermal plasma in which the amount of hydrogen gas as a working gas is adjusted to be less than 0.3 l/min.
Inventors:
SAKAMAKI KOICHI (JP)
SAITO KAZUYA (JP)
NAKAMURA KIYOMI (JP)
SAITO KAZUYA (JP)
NAKAMURA KIYOMI (JP)
Application Number:
PCT/JP2018/044501
Publication Date:
June 27, 2019
Filing Date:
December 04, 2018
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
B22F1/05; B22F1/065; B22F1/14; B22F3/105; B22F3/16; B22F9/08; B33Y70/00; C22C14/00
Domestic Patent References:
| WO2016140064A1 | 2016-09-09 |
Foreign References:
| JP2012246203A | 2012-12-13 |
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