Acta Mechanica Slovaca 2022, 26(1):42-51 | DOI: 10.21496/ams.2022.003

Use of Duplex PVD Coatings to Increase the Life of Moulds and Cores for die Casting of Aluminium Alloys in the Automotive Industry

Janette Brezinová1, *, Ján Viňáš1, Miroslav Džupon2, Dagmar Jakubeczyová2, Jakub Brezina1, Henrich Sailer1, Ján Hašuľ1, Michal Považan1
1 Technical university of Košice, Department of Technology, Materials and Computer Aided Production, Mäsiarska 74, 042 00, Košice
2 Technical university of Košice, SAV, Watsonova 1935/47, 04001, Košice-Sever

The paper presents the results of research aimed at increasing the life of moulds and cores for high-pressure aluminium casting. The castings produced are intended for the automotive industry. Local impulse heating was applied to the surface of the base material of the Uddeholm Dievar moulds. Three heating rates were used. After surface treatment, structural analysis was performed. PVD coating nACRo3 was applied to the surface treated in this way. Coating deposition was performed by Larc technology. The quality of the coating was evaluated on the basis of the Scratch test and the Mercedes test. After laser treatment of the material surface and application of nACRo3 coating, the surface microgeometry was evaluated according to ISO 25 178. The coated surface was then immersed in an Al - Si-based alloy melt at a temperature of 680 ± 20°C and remaining in the melt for 120 and 300 min. Experimental work has confirmed that the resistance of the mould surface has significantly increased.

Keywords: PVD coatings, laser surface remelting, die casting of aluminium, tribology

Published: March 1, 2022  Show citation

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Brezinová, J., Viňáš, J., Džupon, M., Jakubeczyová, D., Brezina, J., Sailer, H., Hašuľ, J., & Považan, M. (2022). Use of Duplex PVD Coatings to Increase the Life of Moulds and Cores for die Casting of Aluminium Alloys in the Automotive Industry. Acta Mechanica Slovaca, 26(1), 42-51. doi: 10.21496/ams.2022.003
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