In:
International Journal of Materials Research, Walter de Gruyter GmbH, Vol. 105, No. 6 ( 2014-06-12), p. 544-551
Abstract:
Electrical discharge alloying was performed on AISI-D2 steel using Ni–W powder mixed dielectric in order to improve the hardness and to reduce the specific wear rate. The alloyed layer was characterized using optical microscopy, scanning electron microscopy, X-ray diffraction analysis and energy-dispersive spectroscopy. Wear tests were conducted based on L9 orthogonal array in a pin-on-disc tribometer and the alloying parameters were optimized using Taguchi's technique. Hard intermetallics based on Fe 7 C 3 , Cr 3 C 2 and Ni 2 W 4 C were formed by electric discharge alloying, which primarily contributed to the improvement in hardness up to 600 HV 0.5 . The specific wear rate of the alloyed layer was subsequently reduced by around a factor of eight compared to that of the base material. The pulse off-time was found to be predominant in obtaining higher hardness and lower specific wear rate among the alloying parameters, peak current, pulse on-time and off-time.
Type of Medium:
Online Resource
ISSN:
2195-8556
,
1862-5282
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2014
detail.hit.zdb_id:
2232675-3
detail.hit.zdb_id:
2128058-7
detail.hit.zdb_id:
203021-4
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