Powders for additive manufacturing and additively manufactured bodies

Abstract

To provide a powder for additive manufacturing that has good fluidity and filling properties and can form a dense powder layer, and an additively manufactured body having such a powder. [Solution] A powder for additive manufacturing used in the manufacture of additively manufactured bodies, wherein, in the cumulative particle size distribution on a volume basis obtained using a laser diffraction particle size distribution analyzer, the particle size D50 at which the cumulative frequency from the smallest diameter side is 50% is 1.0 μm or more and 10.0 μm or less, and the particle size D90 at which the cumulative frequency from the smallest diameter side is 90% is 11.0 μm or more and 25.0 μm or less, and the specific surface area is 0.30 m². 2 A powder for additive manufacturing characterized by having a particle size of less than or equal to / g, a particle number ratio of 70.0% or more with a circularity of 0.750 or more and a coefficient of variation of 15.0% or less obtained by dividing the standard deviation of particle circularity by the mean circularity.

Claims

1. A powder for additive manufacturing used in the production of additively manufactured bodies, In the volume-based cumulative particle size distribution obtained using a laser diffraction particle size distribution analyzer, the particle size D50 at which the cumulative frequency from the smallest diameter side reaches 50% is between 1.0 μm and 10.0 μm. In the cumulative particle size distribution, the particle size D90 at which the cumulative frequency from the smallest diameter side reaches 90% is between 11.0 μm and 25.0 μm. The specific surface area is 0.30 m². ２ / g or less, The number ratio of particles with a circularity of 0.750 or more and 0.950 or less is 70.0% or more. A powder for additive manufacturing characterized in that the coefficient of variation, obtained by dividing the standard deviation of particle circularity by the mean circularity, is 15.0% or less.

2. The additive manufacturing powder according to claim 1, wherein the average circularity is 0.80 or more and less than 1.

00.

3. The additive manufacturing powder according to claim 1 or 2, wherein the ratio of tap density to bulk density is 1.20 or more and 1.75 or less.

4. The additive manufacturing powder according to claim 1 or 2, wherein the constituent material is an Fe-based metal material.

5. The additive manufacturing powder according to claim 4, wherein the Fe-based metal material is stainless steel.

6. The additive manufacturing powder according to claim 1 or 2, A binder that binds the particles of the additive manufacturing powder together, A laminated body characterized by having the following features.

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