Microstructural aspects determining the adhesive wear of tool steels |
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| Affiliation: | 1. Department of Physical Metallurgy and Materials Testing, University of Leoben, Franz-Josef-Straße 18, A-8700 Leoben, Austria;2. Materials Center Leoben, Franz-Josef-Straße 13, A-8700 Leoben, Austria;3. Böhler Edelstahl GmbH, Mariazellerstraße 25, A-8605 Kapfenberg, Austria;1. University of Lyon, Ecole Centrale de Lyon, LTDS UMR 5513 CNRS, Ecully, France;2. University of Lyon, Ecole des Mines de Saint-Etienne, LGF UMR 5307 CNRS, Saint-Etienne, France;3. Laboratory for Mechanics of Materials and Nanostructures, Empa, Swiss Federal Laboratories for Materials Science and Technology, Thun, Switzerland;4. Safran Ceramics, Le Haillan, France;1. AC²T research GmbH, Viktor-Kaplan-Straße 2, 2700 Wiener Neustadt, Austria;2. Sandvik Mining and Construction GmbH, Alpinestrasse 1, 8740 Zeltweg, Austria;1. Tampere University, Faculty of Engineering and Natural Sciences, Tampere Wear Center, Tampere, Finland;2. Robit Ltd, Lempäälä, Finland;3. University of Oulu, Faculty of Technology, Materials Engineering, Oulu, Finland |
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| Abstract: | In many machining applications, adhesion of the workpiece to the tool is a major problem. Adhesion may be reduced by changing the microstructure of the tool steel, e.g. by increasing the carbide content. The present work deals with the influence of some microstructural parameters in the adhesive wear of tool steels. The investigations were conducted using six model alloys based on the powder metallurgy high speed steel AISI M4, all of which had the same martensitic matrix composition after heat treatment. The alloys had MC carbide contents which varied between 0 and 25 mol% in 5 mol% increments. Ball-on-disc experiments were carried out in ambient air at room temperature using austenitic stainless steel and aluminum balls as counterfaces. Wear tracks on the disks were characterized using both a scanning electron microscope and an optical profiler. The results show that two main parameters determine the adhesive wear behavior: the carbide content and the distance between carbides. |
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