| 摘要 |
Methods for reducing the pressing pressure when manufacturing fine-grained cemented carbides are provided. A method for preparing a cemented carbide powder using low compression pressure comprises using 1 to 3 wt.% of a pressing agent having a composition comprising 90 wt.% or less of PEG and 10 wt.% or more of long chained fatty acids, fatty acid esters and fatty acid salts with 20 or more carbon atoms. The powder further comprises WC and 2 to 20 wt.% of binder capable of being alloyed with additives such as Ni, Fe, etc. as a binder that is ordinarily cobalt, and preferably comprises from 6 to 12 wt.% of binder with grain growth inhibitors, less than 1 wt.% of Cr and less than 1 wt.% of V. A cemented carbide powder that is ready to be pressed by low compression pressure comprises 1 to 3 wt.% of a pressing agent having a composition comprising 90 wt.% or less of PEG and 10 wt.% or more of long chained fatty acids, fatty acid esters and fatty acid salts with 20 or more carbon atoms.
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