1. Powder treatment

Powder previous treatment: Drying the powder can remove the adsorbed moisture. Sieve the powder to remove impurities and powder particles that do not meet the particle size requirements.

Powder storage and use:Adopt sealed, dry storage containers to save the powder, to prevent the powder from adsorbing too much gas and moisture.

2. Optimize the printing process parameters

Optimization of energy parameters: Adopt experiments and simulations to determine the appropriate combination of laser power and scanning speed.

Scanning strategy optimization: Adopt a reasonable scanning path, so that the solidification sequence of the melt pool is conducive to gas discharge.

3. Equipment environment improvement

Protective gas control: Ensure that the flow of protective gas is sufficient, and according to the requirements of the print material and printing process to select the appropriate protective gas.

Protective gas preheating treatment: Which can reduce the protective gas into the melt caused by temperature fluctuations, which is conducive to the stability of the melt pool and gas discharge.

Printing room cleaning: Keep the printing room clean and dry.

4. Material modification and post-treatment

Material modification: For materials prone to porosity, you can add alloying elements to change its solidification characteristics.

Post-treatment methods:Adopt hot pressing process, which is a commonly used post-treatment method to eliminate porosity.