Abrasive wear resistance of high-vanadium cast iron
Journal Title: Archiwum Odlewnictwa - Year 2009, Vol 9, Issue 4
Abstract
The study presents the results of tribological tests made on Fe-C-V and Fe-C-V-Si alloys undergoing volume solidification and containing carbon in a range of 1,43-2,58%, vanadium in a range of 5,34-14,77%, and silicon in a range of 1,06-3,69%. The, crystallising in Fe-C-V alloys, eutectic is composed of ferrite and vanadium carbides of the VC1-x type, and as such is included in the group of fibrous eutectics. Introducing silicon additions to the Fe-C-V system changes the geometry of the crystallising eutectic from fibrous into complex regular, while the shape of the primary carbides crystallising as non-faceted-non-faceted dendrites changes into a faceted form. It has been proved that the type of matrix has also a very important effect on the abrasive wear behaviour. The possibility has been indicated to manufacture Fe-C-V alloys with matrix containing lamellar pearlite, characterised by the abrasive wear resistance comparable to that of Hadfield cast steel. It is also possible to make alloys which will have the matrix composed of a mixture of lamellar and granular pearlite, or of a mixture of lamellar pearlite and cementite, and in this case their abrasive wear resistance will be superior to that of Hadfield cast steel. Within the examined range of chemical compositions, the addition of silicon has been reported to reduce the abrasive wear resistance.
Authors and Affiliations
M. Kawalec, E. Fraś
Keywords
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