Reactive Sintering of Bimodal WC-Co Hardmetals

Reactive Sintering of Bimodal WC-Co Hardmetals

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 distri...

Full description

Saved in:
Bibliographic Details
Published in:Medžiagotyra Vol. 21; no. 3; pp. 382 - 385
Main Authors: Tarraste, Marek, Juhani, Kristjan, Pirso, Jüri, Viljus, Mart
Format: Journal Article
Language:English
Published: Kaunas University of Technology 02-09-2015
Subjects:
bimodal
hardmetals
mechanical properties
microstructure
reactive sintering
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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
ISSN:1392-1320
2029-7289
DOI:10.5755/j01.ms.21.3.7511