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New 3D Printing Material-Refractory Metal

Stanford Advanced Materials has overcome the problem of turning refractory metals into 3D printing materials. The refractory metal spherical powders for 3D printing we have manufactured are now available in bulk, and are even applied in the key components of aerospace industry.

Refractory Metal

Materials such as tungsten, molybdenum and rhenium have high melting point. For example, the melting point of tungsten is 3410 degrees. To turn such metals into spherical powders for 3D printing is very difficult. But at the same time these refractory metals have good high temperature resistance, corrosion resistance, high hardness, low expansion coefficient and other characteristics. They are widely used in aerospace industry. Currently, Germany, the United States, Japan and other countries have the core technologies of the related equipment and materials of metal spherical powders for 3D printing. The production of metal spherical powder has been industrialized. And the technical standards system of powder raw materials and product manufacturing has been established. SAM can supply ultra-fine 3D printing refractory metal spherical powder, which can basically meet the requirements of industrial production in terms of material purity, sphericity, spheroidization rate and batch stability.

With the plasma spheroidization technique, scattered non-spherical powder is rapidly melted by going through plasma zone. Due to surface tension, the melted droplet becomes spherical. And then, after quick solidification, refractory metal spherical powder for 3D printing is produced. As the powder material has been through surface treatment and modification, its filling density is 2 times that of non-spherical powder, its sphericity reaches 90% or more, its spheroidization rate reaches 85% or more, its average particle size is less than 40μm. The successful production of refractory metal spherical powder and the application of it in key components of aerospace industry have filled the blank of production of high quality refractory metal spherical powder.

Keywords: 3D printing,refractory metals,molybdenum,tungsten

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