Abstract
The development of additive technologies in the Russian Federation is constrained by the lack of indigenous base for the production of metal powders. SPbPU has developed, manufactured and introduced a plasma atomizer. It provides atomization of metal powders and alloys of various chemical compositions. The data on the main technological parameters of atomization of nickel alloy Inconel 718 and titanium alloy Ti-6A1-4V are presented in the paper. It is shown that by optimizing the spraying mode the possibility to obtain alloy powders with a high level of sphericity and a minimum number of particles with surface and internal defects. The chemical compositions of the obtained particles are almost identical to the composition of the initial atomized materials. Samples for the mechanical testing were made from the obtained powders by the SLM method. The results of mechanical properties tests show that the properties of samples made by 3D printing methods from powders sprayed by plasma atomization methods are identical to the properties of materials made and heat-treated by traditional methods.
Highlights
The beginning of the XXI century was marked by the development of new approaches and requirements for manufactured equipment
Subtractive technologies are being replaced by new – additive technologies based on prototyping parts by laser fusing of metal powders
Plasma atomization is a kind of gas atomization in which the melting of a solid feedstock occurs under the influence of a high energy flow of ionized gas-plasma
Summary
The beginning of the XXI century was marked by the development of new approaches and requirements for manufactured equipment. The most popular technologies of the past – technologies based on subtractive processing processes, such as turning, milling, and drilling – are becoming a thing of the past. Using subtractive technologies caused the metal utilization rate to reduce – more than half of the billet mass was consumed in the chips. Subtractive technologies are being replaced by new – additive technologies based on prototyping parts by laser fusing of metal powders. These technologies can reduce the material consumption of products by two or more times, simplify the technological process of their production, and solve environmental safety issues
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