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A new test method for measuring the galling resistance between metal powders and die tool materials in powder compaction
Dalarna University, School of Technology and Business Studies, Material Science.
2010 (English)In: 14th Nordtrib Conference, Storforsen, Sweden, 2010Conference paper, Published paper (Refereed) Published
Abstract [en]

The friction characteristics and galling resistance between metal powder and die tool material in metal powder compaction is of outmost importance since they will influence the porosity and surface quality of the green body and consequently the porosity, tolerances and surface quality of the final sintered product. In the present study, a new test method for evaluating the tribological performance of die tool materials aimed for powder compaction is presented. The test method is based on controlled scratch testing using a commercial scratch tester but instead of the commonly used Rockwell C diamond stylus a sample holder with a small green body of compacted powder particles is drawn over the surface in a well controlled multi pass linear reciprocating sliding contact. The capability of the test method was evaluated for different types of tool materials including two PVD coatings in contact with different types of metal powders to determine the friction characteristics and the adhesion and material transfer tendency at the sliding interface. Post-test examination of the tool surfaces using FEG-SEM, EDS and 3D surface profilometry were performed in order to evaluate the mechanisms controlling the friction behavior and the material transfer tendency.

Place, publisher, year, edition, pages
Storforsen, Sweden, 2010.
Keyword [en]
Pulverpressning, tribotest, friktion, galling, verktygsmaterial
Research subject
Stålformning och ytteknik, SuSintPart - Verktygskoncept för miljömässigt hållbar tillverkning
Identifiers
URN: urn:nbn:se:du-4664OAI: oai:dalea.du.se:4664DiVA: diva2:522115
Conference
14th Nordtrib Conference , Storforsen, Sweden, 8-11 juni 2010, 2010
Available from: 2010-04-27 Created: 2010-04-27 Last updated: 2012-04-24Bibliographically approved

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Citation style
  • apa
  • ieee
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  • vancouver
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  • chicago-note-bibliography
  • Other style
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Language
  • de-DE
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  • en-US
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  • nn-NO
  • nn-NB
  • sv-SE
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Output format
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