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Surface modification of forming tools for aluminum sheet metal forming

 
: Kuisat, Florian; Abraham, Tim; Schmidt, Torsten; Weber, Martin; Demmler, Matthias; Bräuer, Günter; Lasagni, Andrés Fabián

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Volltext (PDF; )

Journal of Laser Micro/Nanoengineering. Online journal 15 (2020), Nr.1, S.49-55
http://www.jlps.gr.jp/jlmn/index.php?action=laser_archive_vol
ISSN: 1880-0688
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IST ()
direct laser interference patterning; micro-structuring; coating-system; nitriding processes; tool steel

Abstract
It is known that surface patterns and coating systems can affect the flow behavior of forming tools. In this context, we report about the surface modification of forming tool steels for aluminum sheet metal forming process. Microstructures with variable spatial periods and depths are fabricated on tool steel samples using the direct laser interference patterning method. A picosecond-pulsed infrared laser source with a two-beam interference setup is applied for producing line-like structures. In addition, a diamond like carbon (DLC) coating system is deposited on the structured surfaces. To improve the adhesion tendency of the DLC coating, also different plasma nitriding parameters are examined. According to the results, a broad spectrum of different coating-structure combinations can be efficiently processed, which can optimize the tribological properties of the forming tool for aluminum forming applications.

: http://publica.fraunhofer.de/dokumente/N-596888.html