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VERSION:2.0
METHOD:PUBLISH
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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 16b
SUMMARY:Laser implantation of ceramic particles into hot working tool surfaces for improving the tribological performance within hot stamping
DESCRIPTION:Hot stamping has been established in the automotive industry as a key technology for lightweight construction, regarding the manufacturing of safety-relevant car body components. Hot stamped parts are commonly made out of boron-manganese steel sheets 22MnB5, which are initially austenized and subsequently formed and quenched simultaneously. However, these cyclic thermo-mechanical loads encourage the formation of severe wear and high friction at the blank-die interface, which in turn leads to a time and cost consuming rework of the tool. For this purpose, a promising new approach named laser implantation process has been investigated for improving the tribological behavior of hot stamping tools. This technique enables the generation of highly wear resistant, separated and elevated features in micrometre range by embedding hard ceramic particles into the tool surface via pulsed laser radiation. As a result, the contact area between tool and surface and thus the tribological and thermal interactions are locally influenced. Within first studies, the effectiveness of the laser implantation process has already been proven in laboratory scale by means of modified pin-on-disk tests. However, the transferability of this surface engineering technology with regard to an industry-related deep drawing process has not been investigated in detail yet. For this purpose, a locally modified as well as a conventional die are utilized for hot stamping rectangular cups, in order to qualify the tribological impact of the laser implantation process by using an industry-related tooling system. To evaluate the tribological performance, the maximum punch forces of both tool configurations were compared in order to draw conclusions about the frictional behavior during the forming operation. In addition, hardness measurements were carried out as well as the resulting part geometry was scanned by means of the topometric 3D-sensor ATOS for analysing the mechanical properties and sheet thickness distribution of the hot stamped cups.
CLASS:PUBLIC
DTSTART:20230614T151000
DTEND:20230614T153000
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