Abstract
The strength increase of green compact, that is, the higher compactibility of WC-Ni mixed powder made by ball-milling seems to be needed in the cemented carbide industry. Then, the study of the compactibility was carried out comparing with that of WC-Co powder. It was found that the compactibility of WC-Ni powder was generally lower than that of WC-Co one, when ball-milling condition was fixed, and that the phenomenon was caused by the fact that the size of binder-agglomerates formed during milling was larger in WC-Ni powder. Thus, refinning the agglomerates, for instance, by a prolonged ballmilling was necessary to improve the compactibility. The influence of agglomerates on the compactibility was discussed.
