RT Journal Article
SR Electronic
A1 Brezinová, Janette
A1 Viňáš, Ján
A1 Džupon, Miroslav
A1 Jakubeczyová, Dagmar
A1 Brezina, Jakub
A1 Sailer, Henrich
A1 Hašuľ, Ján
A1 Považan, Michal
T1 Use of Duplex PVD Coatings to Increase the Life of Moulds and Cores for die Casting of Aluminium Alloys in the Automotive Industry
JF Acta Mechanica Slovaca
YR 2022
VO 26
IS 1
SP 42
OP 51
DO 10.21496/ams.2022.003
UL https://www.actamechanica.sk/artkey/ams-202201-0006.php
AB 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 nACRo<sup>3</sup> 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 nACRo<sup>3</sup> 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.