What does 3D printing of metals mean?
3D printing metals Are metals which have been reduced to very fine particles. These metals are the basis material of most 3D-printing processes that produce metal parts. The process of layer-by-layer manufacturing is known as 3D printing. The product characteristics are determined by the specific 3D printing technique used and the nature of the metal powder.
Three-dimensional printing of metal
For accurate reproduction of metal parts in production, 3D metal powder should have the same characteristics. This powder has a consistent size distribution and morphology. Others physicochemical property include compressibility, density, sinterability and chemical composition.
The preparation of 3D printed metal
The choice of powder manufacturing method can be varied to achieve metal powders of desired quality.
You have many options for producing metal powders. A good method of producing AM metal powder is atomization, which produces the most useful powder for 3D printing.
Three types of atomization are possible: water, gas and plasma. The particles will have an irregular morphology when water is atomized. Because the solidification rate of the particles exceeds their spheroidization speed, this makes water atomization inapplicable for AM.
1. Gas atomization. The alloy ingot serves as the raw material that is melted in the furnace. To monitor gaps elements, vacuum induction melting furnace (VIM furnace) is utilized. You can discharge materials into the atomizer directly from the furnace located above the chamber. High-pressure gas is used to spray the melting material into the chamber. The material then solidifies and settles down at the bottom. This experiment uses an inert medium, usually nitrogen or argon. It can be used to minimize the potential for oxidation and polluting. You can also use air as a gaseous media. You can adjust the ratio between melt flow rate and gas so that the particle size distribution (0-500mm), can be controlled to a degree. Gas atomization can produce nickel, iron and cobalt powders.
2. Plasma nebulization – The raw material is brought into the chamber by the coaxial plasma torch and the gas nozzle in one of two forms: wire or powder. Coaxial plasma torch (or gas nozzle) simultaneously melts and disperses the raw material in the chamber. After that, titanium can be produced using plasma atomization.
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