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Metal powders dedicated to metal additive manufacturing

Metal powders dedicated to metal additive manufacturing

Multistation is offering, available from stock, different types of metal powders dedicated to the various metal additive manufacturing processes.


Multistation now provide powders selected by machine manufacturers and source them as well from powder manufacturers referenced in additive manufacturing.

- Aluminum alloys: AlSi10Mg, AlSi12, AlSi7Mg 0,6, AlSi9Cu3

- Titanium alloys: Ti6A14V, Ti6Al7Nb, Reintitan

- Nickel-based alloys: Inconel 625, 718, 939...

- Steel: 316L, 15-5HP, 17-4PH, 1.2709

- Cobalt chrom : CoCr (1,3 & 2,3),


Since the powders offer is evolving, we are choosing to offer not only powder selected by the manufacturers of the machine but also powders coming from different suppliers recognized in the additive manufacturing technology. We help users to draft the powders specifications and we advise them on the means of characterization to control the powder quality before manufacturing the part: laser granulometer, scanning electron microscope, Hall flowmeter... These powders can be validated by a partner user.

The expertise of Multistation in additive manufacturing make the customers understand physical and thermal phenomenon relied to the process (interaction between laser and material, solidification, cooling..)


Questions/Answers

What is the manufacturing method of MAM powders?

- Gas atomization (Argon, Nitrogen)
- Plasma atomization
- Rotating electrode atomization

Why choose a spherical powder for powder bed processes?

- Increase particle density
- Expand packed density and compactness of the powder bed
- Improve the capacity of powder flow


How to characterize the powder’s microstructure?

- Observing the morphology with a Scanning Electron Microscope
- Checking the chemical composition: elemental analysis (EDS, X-ray fluorescence), ICP
- Identifying the size distribution: screening, laser granulometer
- Flow capacity: Hall Flowmeter, FreemanFT4

1) Atomization processes

Atomization processes (water, gas, plasma and rotating electrode atomization) are used to produce metallic powders.
The most commonly used techniques for the production of metallic powders designed for additive manufacturing are gas (Argon or Nitrogen) and plasma atomization.

COMPARATIVE TABLE FOR THE DIFFERENT ATOMIZATION PROCESSES

Manufacturing process

Particle size (µm)

Strengths

Weaknesses

Uses

Water atomization
(Low cost)

0-500

-Wide range of products
-Lower cost
-Raw material in the form of ingots

-Irregular shape
-Very high particle-size distribution
-Presence of satellites
-High oxygen level

-Non reactive powders

Gas atomization
(Moderate cost)

0-500

-Wide variety of materials
-Reactive materials
-Spherical particles
-Better-controlled oxygen level
-Raw material in the form of ingots

-Presence of satellites
-High particle-size distribution

Ni, Co, Fe, Ti, Al alloys

Centrifugal atomization
(High cost)

0-100

-Wide range of materials
-Narrow particle-size distribution
-Spherical particles

-Very high rotating speeds required to produce fine particles

Ni, Co, Ti, Al alloys

Rotating electrodes
(High cost)

0-100

-High-purity powders
-Highly spherical particles

-Low productivity
-Very high cost

Ni, Co, CoCr, Ti alloys

Plasma atomization
(High cost)

0-200

-High-purity powders
-Extremely spherical particles

-Raw material in the form of wire or powder
-Very high cost

Ti, Al, … alloys


Contact

Tel : +33 (0) 2 99 16 35 35
fax : +33 (0) 2 99 46 41 41
multistation@multistation.com

29 Rue de l’ Isle Celée - BP 80126 - 35801 DINARD Cedex - (FRANCE)
CNIL : N°898941

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