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Pin on disc wear investigation of nitrocarburised H13 tool steel
journal contribution
posted on 2005-04-01, 00:00 authored by P King, R Reynoldson, Allan Brownrigg, John LongJohn LongNitrocarburised H13 disks were tested in dry, sliding wear against a stationary ruby ball (pin). Three different 4 h nitrocarburising treatments were compared, using N2/NH3/CO2, N2/NH3/natural gas and N2/NH3 gas mixtures, resulting in compound layers of varying thickness, hardness, porosity and oxide morphology. During mild, oxidative wear, with the formation of abrasive wear debris, the most brittle and oxidised surfaces performed poorly. Polishing to a bright, reflective finish greatly reduced wear. However, the N2/NH3/CO2 sample also frequently maintained a 'very mild' wear regime, owing to the formation of a protective film between the wear surfaces, and resulting in a lowering of the friction coefficient. This treated surface was porous and covered in a complex layer of coarse oxide+epsi-carbonitride. Nitrocarburised samples and wear tracks were characterised by optical microscopy, SEM, atomic force microscopy and stylus profilometry.
History
Journal
Surface engineeringVolume
21Issue
2Pagination
99 - 106Publisher
Maney PublishingLocation
London, EnglandPublisher DOI
ISSN
0267-0844Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2005, Institute of Materials, Minerals and MiningUsage metrics
Keywords
pin on discwear testingnitrocarburisingcompound layerH13tool steeloxidative wearfriction coefficientfluidised bedcover layerScience & TechnologyTechnologyMaterials Science, Coatings & FilmsMaterials Sciencefludised bedpolishingporosityAFMprofilometrySEMBEHAVIORRESISTANCEALLOYCondensed Matter Physics
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