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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 Long
Nitrocarburised 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 engineering

Volume

21

Issue

2

Pagination

99 - 106

Publisher

Maney Publishing

Location

London, England

ISSN

0267-0844

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2005, Institute of Materials, Minerals and Mining