	US 11,807,916 B2
	Powder consisting of a nickel-cobalt alloy, and method for producing the powder
Bodo Gehrmann, Plettenberg (DE); Tatiana Hentrich, Werdohl (DE); Christina Schmidt, Bochum (DE); and Katrin Brunnert, Iserlohn (DE)
Assigned to VDM METALS INTERNATIONAL GMBH, Werdohl (DE)
Appl. No. 17/606,820
Filed by VDM Metals International GmbH, Werdohl (DE)
PCT Filed Jul. 1, 2020, PCT No. PCT/DE2020/100577 § 371(c)(1), (2) Date Oct. 27, 2021, PCT Pub. No. WO2021/004581, PCT Pub. Date Jan. 14, 2021.
Claims priority of application No. 10 2019 118 224.7 (DE), filed on Jul. 5, 2019; and application No. 10 2020 116 868.3 (DE), filed on Jun. 26, 2020.
Prior Publication US 2022/0243306 A1, Aug. 4, 2022
Int. Cl. B22F 1/05 (2022.01); C22C 19/05 (2006.01); B33Y 70/00 (2020.01); B22F 9/08 (2006.01); B22F 1/065 (2022.01)

CPC C22C 19/05 (2013.01) [B22F 1/05 (2022.01); B22F 1/065 (2022.01); B22F 9/082 (2013.01); B33Y 70/00 (2014.12); C22C 19/056 (2013.01); B22F 2009/0844 (2013.01); B22F 2301/15 (2013.01); B22F 2304/10 (2013.01)]

16 Claims

1. A method for the manufacture of a powder from a nickel-cobalt alloy, wherein the contents (in wt %) are defined as follows:

C>0-max. 0.1%

S max. 0.015%

Cr 13-23%

Ni the rest (>30%)

Mn max. 1.0%

Si max. 1.0%

Mo 1-6%

Ti>0-3.0%

Nb+Ta 3-8%

Cu max. 0.5%

Fe>0-max. 10%

Al>0-<4.0%

V up to 4%

Zr>0-max. 0.1%

Co>12-<35%

W up to 4%

Hf up to 3.0%

O max. 0.1%

N>0-max. 0.1%

Mg>0-max. 0.01%

B>0-max. 0.02%

P>0-max. 0.03%

Ar 0-max. 0.08%

Se max. 0.0005%

Bi max. 0.00005%

Pb max. 0.002%

in which

an alloy is smelted in a VIM furnace,

the molten melt is maintained for 5 minutes to 2 hours for homogenization,

a closed atomization system having a supplied gas is adjusted to a dew point of −10° C. to −120° C.,

the melt is blown by a nozzle in a gas stream with a gas flow rate of 2 m³/min to 150 m³/min,

the solidified powder particles are collected in a gas-tight closed container, wherein

the particles have a particle size of 5 μm to 250 μm,

the particles of the powder are spherical,

the powder has gas inclusions of 0.0 to 4% pore area (pores >1 μm) in relationship to the total area of evaluated objects,

the powder has a bulk density of 2 up to the density of the alloy, which is approximately 8 g/cm³,

the powder is packed air-tightly under a protective-gas atmosphere with argon.