KME offers copper and copper alloy for additive manufacturing based on its high-quality materials.
The production of the powders is done by melting the known KME alloys
in order to achieve the highest requirements for purity and composition.
Available materials and alloys are:
- Cu-OF, Cu-ETP
Other materials can be supplied on request.
The KME copper powders are produced by gas atomisation with subsequent screening and air separation processes. This ensures that the KME copper powder has almost spherical particles, optimal particle sizes and a good particle size distribution.
This results in a high flowability and very good bulk density. In addition, KME copper powders are characterized by very low humidity.
In the additive manufacturing process, this combination of properties leads to a uniform and dense powder layer. The component density achievable with KME copper powders is very high.
Table 1 lists the unalloyed and low-alloyed KME copper powders. The Cu-OFE is characterized by highest electrical and thermal conductivity. The Cu-HCP and CuAg0.1P offer an increased recrystallization temperature while still maintaining a very high conductivity of the printed component.
The age-hardenable KME copper powders CuCr1Zr and CuNi2.5SiCr achieve highest strengths after the selective manufacturing process by age-hardening and belong to the thermally most stable copper alloys, Table 2.
The high-alloyed copper-based alloy CuNi30Mn1Fe is characterised by high corrosion resistance and is primarily used in seawater. The nickel-based material NiCu30Fe has even higher strength values. In addition to higher seawater resistance, the high temperature resistance in a carbon-rich atmosphere is excellent.