Wear of additively manufactured tool steel in contact with aluminium alloy

In this work, additively manufactured (AM) tool steel discs were prepared by selective laser melting (SLM) and subjected to pin-on-disc experiments in contact to aluminium alloy pin at various temperatures. The experimental conditions were selected to replicate those in hot forming of aluminium allo...

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Veröffentlicht in:Wear 2019-08, Vol.432-433, p.202934, Article 202934
Hauptverfasser: Huttunen-Saarivirta, E., Heino, V., Vaajoki, A., Hakala, T.J., Ronkainen, H.
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Sprache:eng
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Zusammenfassung:In this work, additively manufactured (AM) tool steel discs were prepared by selective laser melting (SLM) and subjected to pin-on-disc experiments in contact to aluminium alloy pin at various temperatures. The experimental conditions were selected to replicate those in hot forming of aluminium alloys. The results demonstrated that abrasive wear of the AM tool steel was the dominant wear process. At elevated temperatures, weight losses of the AM tool steel specimens decreased systematically with increase in temperature. Profilometric investigations revealed that the wear tracks were wide and shallow, with the greatest width being detected at 450°C and the deepest wear track at 400°C. Particularly at 450 and 500°C, most of the wear debris released from the AM tool steel surface attached to the aluminium alloy pin and modified the tool steel-aluminium alloy contact. At 500°C, the wear debris formed a glaze layer on the aluminium alloy pin surface. •Optimized process parameters in SLM provided low porosity AM tool steel discs.•AM tool steel discs against aluminium alloy were tested in HT-tribometer.•Oxide film in AM tool steel decreased galling tendency of the aluminium alloy.•Low and steadier wear rate in AM tool steel due to oxide formation.•Results indicate promising future for AM tool steel dies with optimised printing parameters.
ISSN:0043-1648
1873-2577
DOI:10.1016/j.wear.2019.202934