Adaption of tribological behavior of a-C:H coatings for application in dry deep drawing

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autorinnen und Autoren: Häfner T, Rothammer B, Tenner J, Krachenfels K, Merklein M, Tremmel S, Schmidt M, Schmidt M
Herausgeber: MATEC Web of Conferences
Zeitschrift: MATEC Web of Conferences
Verlag: EDP Sciences
Jahr der Veröffentlichung: 2018
Band: 190
Tagungsband: 5th International Conference on New Forming Technology (ICNFT 2018)
Seitenbereich: 1 - 10
ISSN: 2261-236X
Sprache: Englisch


Nowadays the sheet metal forming industry faces challenges regarding efficient usage of resources and sustainability. One strategy to increase the environmental friendliness is to abandon the application of lubricants. The direct contact between tool and workpiece leads to an intensive interaction which increases friction. Especially for deep drawing processes with long sliding distances, this causes distinctive wear. The tool sided application of carbon based coatings is a well-known approach to reduce friction and wear. Former studies have shown a beneficial behavior of hydrogenated amorphous carbon based coatings (a-C:H) to improve the tribological conditions in contact with steel sheets and aluminium alloys under dry conditions. Within this study the coating process and the resulting coating properties will be analyzed. Afterwards mechanical and laser based surface treatment processes prior and after the deposition process will be investigated to reduce the coating roughness. Different roughness values were achieved by varying the surface treatment processes. The laser based finishing enables a reduction of the Spk values by removing single roughness asperities. In order to identify the necessary process parameters for the laser treatment, an analytical model of the material removal was applied. The laser surface treatment achieved similar roughness characteristics compared to mechanical treatment. In this study the tribological behavior of a-C:H coated tools was analyzed under dry conditions within strip drawing tests. The tribological investigations revealed that for dry deep drawing of zinc coated DC04 a broader range of Spk values leads to acceptable tribological conditions whereas for AA5182 a smoother tool surface has to be ensured to prevent adhesion and utilize the full potential of a-C:H coatings.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Häfner, Tom
Lehrstuhl für Photonische Technologien
Krachenfels, Kim
Lehrstuhl für Fertigungstechnologie
Merklein, Marion Prof. Dr.-Ing.
Lehrstuhl für Fertigungstechnologie
Rothammer, Benedict
Lehrstuhl für Konstruktionstechnik
Schmidt, Michael Prof. Dr.-Ing.
Lehrstuhl für Photonische Technologien
Tenner, Jennifer
Lehrstuhl für Fertigungstechnologie
Tremmel, Stephan Dr.-Ing.
Lehrstuhl für Konstruktionstechnik

Zusätzliche Organisationseinheit(en)
Lehrstuhl für Photonische Technologien
Lehrstuhl für Konstruktionstechnik
Lehrstuhl für Fertigungstechnologie

Einrichtungen weiterer Autorinnen und Autoren

Bayerisches Laserzentrum gemeinnützige Forschungsgesellschaft mbH (BLZ)


Häfner, T., Rothammer, B., Tenner, J., Krachenfels, K., Merklein, M., Tremmel, S.,... Schmidt, M. (2018). Adaption of tribological behavior of a-C:H coatings for application in dry deep drawing. MATEC Web of Conferences, 190, 1 - 10.

Häfner, Tom, et al. "Adaption of tribological behavior of a-C:H coatings for application in dry deep drawing." MATEC Web of Conferences 190 (2018): 1 - 10.


Zuletzt aktualisiert 2019-07-02 um 11:37