MECHANICAL AND TRIBOTECHNICAL CHARACTERISTICS OF FINE-GRAINED HARD ALLOYS OBTAINED BY COREDUCTION AND CARBIDIZATION OF TUNGSTEN-COBALT OXIDE SYSTEMS

Authors
UVAROVA IV PETUKHOV AS KOVALCHENKO AM DOLZHEK MA OSTAPENKO IT MIRONOVA AG
Citation
Iv. Uvarova et al., MECHANICAL AND TRIBOTECHNICAL CHARACTERISTICS OF FINE-GRAINED HARD ALLOYS OBTAINED BY COREDUCTION AND CARBIDIZATION OF TUNGSTEN-COBALT OXIDE SYSTEMS, Powder metallurgy and metal ceramics, 35(9-10), 1996, pp. 569-573
Citations number
7
Categorie Soggetti
Material Science, Ceramics","Metallurgy & Metallurigical Engineering
Journal title
Powder metallurgy and metal ceramics → ACNP
ISSN journal
10681302
Volume
35
Issue
9-10
Year of publication
1996
Pages
569 - 573
Database
ISI
SICI code
1068-1302(1996)35:9-10<569:MATCOF>2.0.ZU;2-6
Abstract
The properties of hard alloys based on fine-grained hard-alloy mixture s, obtained by coreduction of tungsten oxide with the oxides CoO and C o3O4, are discussed. A linear relation is shown between the strength a nd the abrasive resistance. the relative abrasive resistance increased and the wear resistance under friction on steel decreased as the stre ngth increased. Fine-grained mixtures obtained by coreduction and carb idization of WO3 and Co3O4 and sintered at 1440-1450 degrees C were fo und to have the best strength and abrasive resistance. Sintering after homogenizing preannealing enhances the mechanical properties of hard metals.