3D printing of metal powder requires good plasticity.
Three types of preparation for 3D printing metal powder are available: reduction method, electrolysis, grinding method, and atomization method. The two most common pulverizing techniques in China today are the argon-atomization method or plasma rotating electrode.
Argon atomization is a method of making powder. This involves using the fast-flowing argon gases flow to impact the liquid metal, then break it into small particles and finally condense into a solid powder.
2. Plasma rotating electrode method
Plasma state is also known as the fourth state. The process of plasma rotating electro atomization (prep) is simple: The metal or alloy is made into a consumable electrode. The end of consumable electrode melts in coaxial plasma heating source to create liquid film. The liquid film is then thrown out at high speeds to form droplets. Under the action shear stress, the molten liquid dropslet cools and solidifies under the surface tension.
The following are some of the benefits of plasma rotating electrode metal powder:
Powder with high sphericity, smooth surfaces, good fluidity, and high loose densities, ensures uniform powder spreading and high density printing products. There is no hollow powder or satellite powder. Also, there are no defects like air gaps, entanglement, precipitation pores, cracks, or any other problems caused by hollow balls during the printing process.
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