The gear wheel printed by Heraeus eclipses all previous results. Produced by additive manufacturing, this compact machine part weighs two kilograms. Due to the required high cooling rates of mainly over 1000 Kelvin/second, only small parts could be produced from amorphous metals previously. Because the topology of the gear was also optimized during development, material and process experts were able to reduce the weight by 50 percent compared to conventional manufactured versions. Heraeus has now redefined the existing limits of technology in terms of size and complexity, revolutionizing design possibilities, for example, in the automation industry as well as in robotics. Heraeus set this world record using a commercially available laser melt printer.
Amorphous metals allow completely new design possibilities and applications
In contrast to pure metals and classic alloys, amorphous metals are characterized by an irregular, non-crystalline structure. They combine properties within one material that normally are not feasible: extreme hardness and high yield strength with a high elasticity. Amorphous metals are characterized by good corrosion resistance, excellent wear resistance and the elasticity of polymers. They also have soft magnetic properties and are easy to magnetize and demagnetize. With this combination of properties, amorphous metals are superior to steel, titanium and many other materials.
Reduced weight thanks to precision manufacturing
High-precision layer-by-layer production with special materials from Heraeus also reduces material usage, saving weight and costs. Using 3D printing also reduces overall production costs. With conventional methods, making complex parts require numerous process and manufacturing steps. Several individual pieces have to be produced and then assembled into a unit. However, 3D printers accomplish this in a single process. Following assembly in the printer, moving parts are immediately ready for use and fully functional.
The world's largest printed amorphous-metal cog wheel can be seen live at the Heraeus booth at Automate in Chicago: April 8-11, 2019, McCormick Place, Booth 9619.
The project was realized in cooperation with Amorphology Inc. , a NASA spinoff located in Pasadena, CA