3D Printing Powder Selection Process

The first consideration is the material properties of the powder, including its composition, grain size, and flow characteristics. This can affect the quality of the final product, as well as the printing speed and ease of use.

The next factor to consider is the printing process itself. Different printing techniques require different powders, so it’s important to choose a powder that is compatible with the printer being used.

One of the important factors affecting the yield of metal 3D printing . How to choose suitable materials is very important in the field of additive materials.

You can consider the following process to determine the particle size of the powder according to the project.

1. SLM ( Selective laser melting technology This technology uses laser as the):  energy source, and scans the metal powder bed layer by layer according to the planned path in the 3D CAD slice model. The scanned metal powder is melted and solidified to achieve metallurgical melting. Combining the effects, the metal parts designed by the model are finally obtained . (The commonly used particle size is 1 5-53 μm. At present, the dimensional accuracy of conventional SLM forming is about 0.1 mm , and the surface roughness Ra is about 6.3 μm).

2. EBM ( Electron Beam Melting Technology) : The principle is to import the three-dimensional solid model data of the parts into the EBM equipment, and then spread a thin layer of fine metal powder in the working cabin of the EBM equipment, and use the high-density energy generated at the focus point by deflecting and focusing the high-energy electron beam to make the The scanned metal powder layer generates high temperature in a small local area, causing the metal particles to melt, and the continuous scanning of the electron beam will make the tiny metal molten pools fuse and solidify, and connect to form a linear and planar metal layer. (The commonly used particle size is 53-105 μm, the current EBM forming accuracy is 0.1-0.2 mm , and the surface roughness Ra is 20-30 μm )

3. LENS (Laser cladding technology ): By means of synchronous or preset materials, external materials are added to the molten pool formed after the substrate is irradiated by laser, and the two are rapidly solidified together to form a cladding layer. (The commonly used particle size is 5 3-150 μm, the accuracy is generally not considered, and the CNC compensation is used later )

4. (Thermal spraying) : Thermal spraying technology is a method of heating the sprayed material to a molten or semi-molten state by a heat source, and spraying and depositing it on the surface of a pretreated substrate at a certain speed to form a coating. Thermal spraying technology creates a special working surface on the surface of ordinary materials to achieve: anti-corrosion, wear-resistant, anti-friction, high temperature resistance, oxidation resistance, heat insulation, insulation, conductivity, anti-microwave radiation, etc. function, so that it can achieve the purpose of saving materials and energy. We call the special working surface coating, and the working method of manufacturing the coating is called thermal spraying. (The commonly used particle size is 45-80 μm , the powder particle size suitable for H VOP supersonic flame spraying is generally 15-53 μm , and the finer powder particle size is also 5-25 μm )

Select the type of material according to the product performance requirements

Aluminum alloy powder Tensile strength Yield Strength Elongation

Bulk Density

Al Si 10M g _ ≥360 MPa _ ≥240 MPa _ ≥5 % ≥1.3 g / cm³
Z YML-1 ≥4 30Mpa _ ≥300MP a _ ≥1 1% ≥1 .32 g / cm³
Z YHL-1 ≥5 20MP a ≥4 60MP a ≥7 % ≥1 .32 g / cm³
Z YHL-2 ≥550 MPa _ ≥520 MP a ≥10 % ≥1.20 g / cm³
Iron-based alloy powder Tensile strength Yield Strength Elongation Hardness
Z YACM-1 1 200-1700MP a 1 000-1600MP a 1 0-15% 4 0-50HRC
1 8N i 300 2 000-2100MP a 1 900-2000MP a 4-5 % 5 0-56HRC
3 16L 6 00-700 MP a 5 00-600 MPa 2 9-39% 2 05-225HV
3 04L 6 45-655 MP a 4 50-550 MP a 3 0-50% 2 25-265HV
Super alloy powder Long-term use temperature Tensile strength Bulk Density Tap density
G H3536 ≤ 900 °C ≥2 45MP a ≥4.2 g / cm³ ≥4.8g / cm³
G H4169 – 253-650 °C ≥1 100MP a ≥4.2 g / cm³ ≥4.8g / cm³
G H3625 ≤950 ℃ _ ≥1 85MP a ≥4. 4 g / cm³ ≥ 5.0 g / cm³
G H5188 ≤9 80 ℃ ≥2 20MP a ≥ 4.7 g / cm³ ≥5.2 g / cm³
G H3230 ≤1000 ℃ _ ≥2 00MPa _ ≥4.6g / cm³ ≥5.2 g / cm³
Pure Ni ≥4. 3 g / cm³ ≥4.8g / cm³
Titanium Alloy Powder Hall velocity Bulk Density Tap density
C4 _ ≤ 50s / 50g _ ≥ 2.4 g / cm³ ≥2.7g / cm³ _ _
T A1 / ≥ 2.5 g / cm³ ≥ 2.8 g / cm³
T A15 ≤ 50s / 50g _ ≥ 2.4 g / cm³ ≥ 2.7 g / cm³
Cobalt Chromium Alloy Powder Hall velocity Bulk Density Tap density
Co C r M o ≤ 16s / 50g _ ≥ 4.3 g / cm³ ≥ 5.1 g / cm³
Co C r M o W ≤ 16s / 50g _ ≥ 4.8 g / cm³ ≥ 5.3 g / cm³

According to your requirements, we can customize high-quality materials that can be mass-produced

The particle size distribution, shape and chemical composition are unique. In order to enable you to seize new market opportunities, Zhongyuan New Materials can modify the material according to your mechanical and mechanical performance requirements, and develop the powder you need. Zhongyuan New Materials separately plans several production lines for the production of customized powders, and maintains high quality and high standards for customized powders.