Manufacturing Technology 2023, 23(6):949-957 | DOI: 10.21062/mft.2023.082

Machinability of UMCo50 Cobalt Superalloy

Oskar Zemčík ORCID..., Karel Kouřil ORCID..., Martin Slaný ORCID..., Jan Zouhar ORCID..., Josef Sedlák ORCID..., ©těpán Kolomý ORCID...
Institute of Manufacturing Technology, FME, Czech Brno University of Technology; Technická 2896/2, 61669 Brno, Czech Republic

Testing of machinability of the UMCo50 superalloy was carried out within the project following the actual production of the semi-finished product by casting. Turning was chosen as the machining method to minimize the effect of an interrupted cut. Considering the machinability of a hard-to-machine alloy, the cutting material with the fine-grained WC-Co carbide with the TiN/TiAlN gradient PVD coating was selected. The progression of cutting forces, chip formation and tool wear were evaluated. Images of the material structure of the semi-finished product and the resulting chips were taken. From the measured values, graphs of the dependence of the chip thickness ratio on the cutting speed and the Taylor´s dependence of the tool durability on the cutting speed were obtained. The aim of the experiment was selection and verification of suitable cutting conditions for efficient machining of this superalloy, especially the appropriate value of the cutting speed. The recommended value of the cutting speed was 50-70 m.min-1, while the tangential component of the cutting force was in the values usual for corrosion-resistant steels.

Keywords: UMCo50, Tool wear, Cobalt, Superalloy, Taylor's formula
Grants and funding:

This research was supported by the project No. TK04020189 within the public tender in the THETA program of the Czech Ministry of Industry and Trade

Received: July 4, 2023; Revised: October 17, 2023; Accepted: November 13, 2023; Prepublished online: November 27, 2023; Published: December 22, 2023  Show citation

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Zemčík O, Kouřil K, Slaný M, Zouhar J, Sedlák J, Kolomý ©. Machinability of UMCo50 Cobalt Superalloy. Manufacturing Technology. 2023;23(6):949-957. doi: 10.21062/mft.2023.082.
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