Whether in aerospace, medical technology, toolmaking or the automotive industry - additive manufacturing is on the advance. In contrast to mechanical manufacturing processes such as milling, turning, etc., in additive manufacturing the component is built up layer by layer. This approach allows a high degree of freedom in the design of a part made with 3D printing. However, for these freedoms, high-quality metal powders are elementary.
DEW's know-how with metal powders is based on years of experience in the production of powders for build-up welding and thermal spraying. Therefore it was obvious to use this knowledge also for AM.
DEW's powder production technology is state-of-the-art and allows an adapted powder processing according to your standards and specifications. For powder production, raw materials are melted in an induction furnace and filled in an atomizer. The atomization process takes place in a closed container in which the liquid melt is atomized under high pressure with an inert gas. In gas atomization, the solidification rate is sufficiently low so that the particles are formed in spherical shape. The spherical particles guarantee excellent flow characteristics and dosing of the powder. The cooling under inert gas ensures that the powder cools down without surface oxidation. The result is a low oxygen content in the powder. Best raw materials without impurities - all powders are controlled in our laboratory.
Figure 1: Metal powder production: Fe-, Ni- and Co-based alloys
Overall, we can divide additive manufacturing into two areas:
Rapid prototyping makes use of the short production times of additive manufacturing if we take the overall processing route into account. This enables the timely production of prototypes, required spare parts and components for research and development. In the area of rapid prototyping, it is essential to produce components that are identical in their mechanical properties to the later series production. The aim is to keep the steel in 3D printing identical to the steel of the later series production.
In contrast to rapid prototyping, additive manufacturing is used to create new components that can't be produced by conventional machining processes such as turning, milling, etc. In this case, the choice of material is based on the required properties of the component. Here it is appropriate and beneficial to use new alloys that have been specially developed for additive manufacturing to unfold all advantages of this technology, including adapted alloying systems. These materials are designed in such a manner to consider the processing characteristics of AM one the one hand, and on the other, enable the best properties of the printed part such as hardness, strength or corrosion resistance.
Thus, both well-known materials according to DIN standards as well new alloys are interesting for AM solutions.
Explore DEW's range of metal powders for additive manufacturing here.
Deutsche Edelstahlwerke (DEW) is one of the world’s leading producers and processors of special steel long products and belongs to the Swiss Steel Group. In the three materials groups – engineering steel, tool steel and stainless, acid and heat resistant steel – Deutsche Edelstahlwerke offers international customers a uniquely wide range of product dimensions, from drawn wire with a diameter of 4.5 mm to open-die forgings with a diameter of 1,100 mm. As a partner with technical competence in steel, Deutsche Edelstahlwerke develops innovative, individual special steel solutions for complex high-tech applications and offers services ranging from steelmaking to extensive steel processing and steel finishing.
Both existing alloys and new materials are suitable options for additive manufacturing. However, when using existing alloys for rapid prototyping, it is important to produce components that are identical in their mechanical properties to the later series production.