Reactive Sintering of Bimodal WC-Co Hardmetals
| Autor: | Marek Tarraste, Kristjan Juhani, Jüri Pirso, Mart Viljus |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Medžiagotyra, Vol 21, Iss 3, Pp 382-385 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1392-1320 2029-7289 |
| DOI: | 10.5755/j01.ms.21.3.7511 |
| Popis: | Bimodal WC-Co hardmetals were produced using novel technology - reactive sintering. Milled and activated tungsten and graphite powders were mixed with commercial coarse grained WC-Co powder and then sintered. The microstructure of produced materials was free of defects and consisted of evenly distributed coarse and fine tungsten carbide grains in cobalt binder. The microstructure, hardness and fracture toughness of reactive sintered bimodal WC-Co hardmetals is exhibited. Developed bimodal hardmetal has perspective for demanding wear applications for its increased combined hardness and toughness. Compared to coarse material there is only slight decrease in fracture toughness (K1c is 14.7 for coarse grained and 14.4 for bimodal), hardness is increased from 1290 to 1350 HV units.DOI: http://dx.doi.org/10.5755/j01.ms.21.3.7511 |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|