Article (Scientific journals)
Oxidative wear behaviour of laser clad high speed steel thick deposits: influence of sliding speed, carbide type and morphology
Hashemi, Seyedeh Neda; Mertens, Anne; Montrieux, Henri-Michel et al.
2017In Surface and Coatings Technology, 315, p. 519-529
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Keywords :
Additive Manufacturing; Laser Cladding; High Speed Steel; Oxidative Wear; Abrasive Wear; Microstructural characterization
Abstract :
[en] The oxidative wear behaviour of four different High Speed Steel (HSS) thick coatings (one cast material and three laser clad deposits with varying Mo, V and W contents) was investigated using a pin-on-disc tribometer at two different sliding speeds of 10cm/s and 50cm/s. Microstructural characterisation (before and after the wear tests) was carried out by SEM and wear debris was analysed by XRD. For all four materials, the oxide layer was formed of hard and brittle haematite-type α-Fe2O3, prone to break and release debris that acted as a third body, thus increasing sample wear. The laser clad HSS materials exhibited a higher wear resistance than their conventional cast counterpart, thanks to their finer microstructures. In particular, the coarser MC and M2C carbides present in the cast material were sensitive to cracking during the wear tests, releasing debris that contributed to increased third body abrasion together with oxide fragments. A detailed comparison of the wear behaviour of the three laser clad deposits, in correlation with their different microstructures, further demonstrated that harder V-rich MC carbides offered better wear resistance compared to the softer W-rich M2C carbides. The morphology of the carbides also played a role in determining the wear resistance at the higher sliding speed of 50 cm/s. Clover-shaped primary MC carbides resisted wear better than angular ones due to their better geometric anchoring. Similarly, the geometric anchoring of eutectic M2C carbides, forming a quasi-continuous network at the grain boundaries of the matrix, proved beneficial at higher sliding speed.
Disciplines :
Materials science & engineering
Author, co-author :
Hashemi, Seyedeh Neda ;  Université de Liège > Département ArGEnCo > Département Argenco : Secteur MS2F
Mertens, Anne  ;  Université de Liège > Département d'aérospatiale et mécanique > Science des matériaux métalliques
Montrieux, Henri-Michel ;  Université de Liège > Département d'aérospatiale et mécanique > Science des matériaux métalliques
Tchuindjang, Jérôme Tchoufack  ;  Université de Liège > Département d'aérospatiale et mécanique > Science des matériaux métalliques
Dedry, Olivier  ;  Université de Liège > Département d'aérospatiale et mécanique > Science des matériaux métalliques
Carrus, Raoul;  Sirris
Lecomte-Beckers, Jacqueline ;  Université de Liège > Département d'aérospatiale et mécanique > Science des matériaux métalliques
Language :
English
Title :
Oxidative wear behaviour of laser clad high speed steel thick deposits: influence of sliding speed, carbide type and morphology
Publication date :
15 April 2017
Journal title :
Surface and Coatings Technology
ISSN :
0257-8972
eISSN :
1879-3347
Publisher :
Elsevier Science, Lausanne, Switzerland
Volume :
315
Pages :
519-529
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 03 March 2017

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