The transferability of the material properties of 3D-printed parts is a key factor in supplementing existing production chains. To assess the transferability of 3D-printed parts, a HK 30 from Schunk Sintermetalltechnik was analysed.
HK 30 is a steel for high-temperature applications. The material can be used at temperatures of up to 850°C. A typical area of application is the automotive industry where the material is used for adjusting parts in the turbocharger, for example.
Determination of density DIN EN ISO 3369
|According to the material data sheet||≥ 7,50 g/cm3|
The results of the density determination indicate that the tensile bar, which was printed with the CEM process, meets the requirements according to the material data sheet and can even show better results than the nominal values demanded.
The tensile tests were carried out with an average specimen diameter of 4.52 mm and a test temperature of 20 °C. The results demonstrate that all target values were achieved by the printed samples. The requirement for elongation at break was even exceeded by 34 %.
tensile tests DIN EN ISO 6892-1 A
|Yield strength / proof stress Rp0,2|
|Tensile strength Rm [MPa]||Elongation at break L0=20mm A|
|According to the material data sheet||>350||>650||>20|
The surface strength and core hardness were also measured according to DIN EN ISO 6507-1. The test values were compared with the material data sheet and achieved an outstanding result. The mean value of the tests carried out were 199 and 213 respectively.
In summary, it can be stated that the tests were carried out successfully. In all tests, the CEM process of AIM3D GmbH can compete with classic manufacturing processes.
All test results were carried out by Schunk Sintermetalltechnik GmbH, test laboratory “Friedrich Eisenkolb”. Report No. 190393 from 22.02.2019