Comparison of Lifetime of the PVD Coatings in Laboratory Dynamic Impact Test and Industrial Fine Blanking Process

0525170 - ÚPT 2021 RIV CH eng J - Journal Article
Daniel, Josef - Žemlička, R. - Grossman, Jan - Luemkemann, A. - Tapp, P. - Galamand, C. - Fořt, Tomáš
Comparison of Lifetime of the PVD Coatings in Laboratory Dynamic Impact Test and Industrial Fine Blanking Process.
Materials. Roč. 13, č. 9 (2020), č. článku 2154. E-ISSN 1996-1944
Institutional support: RVO:68081731
Keywords : dynamic impact test * fine blanking * PVD coatings * impact wear
OECD category: Materials engineering
Impact factor: 3.623, year: 2020
Method of publishing: Open access
https://www.mdpi.com/1996-1944/13/9/2154

Protective hard PVD coatings are used to improve the endurance of the tools exposed to repeated impact load, e.g., fine blanking punches. During the fine blanking process, a coated punch repeatedly impacts sheet metal. Thus, the coating which protects the punch surface is exposed to the dynamic impact load. On the other hand, the laboratory method of dynamic impact testing is well known and used for the development and optimization of protective coatings. This paper is focused on the comparison of tool life and lifetime of the industrial prepared PVD coatings exposed to repeated dynamic impact load in the industrial fine blanking process and the laboratory dynamic impact testing. Three different types of protective coatings were tested and the results were discussed. It was shown that the lifetime of coated specimens in both the fine blanking and the dynamic impact processes was influenced by similar mechanical properties of the protective coatings. The qualitative comparison shows that the lifetime obtained by the dynamic impact test was the same as the lifetime obtained by the industrial fine blanking process. The laboratory impact test appears to be a suitable alternative for the optimisation and development of protective PVD coatings for punches used in the industrial fine blanking process.
Permanent Link: http://hdl.handle.net/11104/0309371