Cobalt oxide as a raw material for the production of WC-Co cemented carbides and its advantages for the pressing process

Autor:	Wolf-Dieter Schubert, Petra Schachinger, Alan Pasquazzi, Ronald Weißenbacher
Rok vydání:	2018
Předmět:	Pressing Materials science 020502 materials Metallurgy chemistry.chemical_element Sintering 02 engineering and technology Raw material Carbide 020401 chemical engineering 0205 materials engineering chemistry Compressibility Cemented carbide 0204 chemical engineering Cobalt Cobalt oxide
Zdroj:	International Journal of Refractory Metals and Hard Materials. 72:104-109
ISSN:	0263-4368
Popis:	In general the cemented carbide industry uses cobalt as a raw material for the production of WC-Co cemented carbide. However the here presented publication shows that even if 100% of the cobalt of the cemented carbide is replaced with Co3O4 prior sintering, dense WC-Co cemented carbide can be achieved when the sintering program contains a hydrogen treatment. The point of the matter when using a cemented carbide powder which contains cobalt oxide (WC-Co3O4) are the huge differences in the compressibility compared to a conventional powder (WC-Co). Depending on the ratio of cobalt and cobalt oxide in the cemented carbide composition the compressibility of the powder/granule can be adjusted in a wide range. This opens up the possibility to produce different cemented carbide grades with an identical compressibility. As a consequence costs for additional pressing tools can be saved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::934d71945dedf8241116dde9267e95e6 https://doi.org/10.1016/j.ijrmhm.2017.12.004 Zobrazit plný text záznamu Full Text from ScienceDirect