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Slurry erosion studies on surface modified 13Cr-4Ni steels: Effect of angle of impingement and particle size
2007 (Engelska)Ingår i: Journal of materials engineering and performance (Print), ISSN 1059-9495, E-ISSN 1544-1024, Vol. 16, nr 5, s. 567-572Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Hydroturbine steels, such as 13Cr-4Ni martensitic steels, are generally subjected to heavy-erosive wear and loss of efficiency due to solid particulate entrainment in the water. Surface-modified steels have proven to give better performance in terms of erosive wear resistance. In the present study, an attempt is made to investigate the effect of angle of impingement and particle size on slurry-jet erosion behavior of pulsed plasma nitrided and laser hardened 13Cr-4Ni steels. Laser hardening process has shown good performance at all angles of impingement due to martensitic transformation of retained austenite. Plastic deformation mode of material removal was also an evident feature of all laser-hardened surface damage locations. However, pulsed-plasma nitrided steels have exhibited chip formation and micro-cutting mode of erosive wear. Erosion with 150-300 mu m size was twice compared to 150 mu m size slurry particulates.

Ort, förlag, år, upplaga, sidor
2007. Vol. 16, nr 5, s. 567-572
Nyckelord [en]
angle of impingement, erosion damage, laser hardening, silt erosion, slurry-jet erosion, surface modification on 13Cr-Ni steels, MARTENSITIC STAINLESS-STEEL, COATINGS, PERFORMANCE, IMPACT, WEAR, Materials Science, Multidisciplinary
Identifikatorer
URN: urn:nbn:se:hv:diva-8478OAI: oai:DiVA.org:hv-8478DiVA, id: diva2:860167
Tillgänglig från: 2015-10-10 Skapad: 2015-10-08 Senast uppdaterad: 2017-12-01Bibliografiskt granskad

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