Preparation method of ultrafine tungsten carbide powder

Abstract

The invention relates to a preparation method of ultrafine tungsten carbide powder. A mixture of ultrafine tungsten powder, carbon black and ultrafine tungsten carbide powder used as an initial reactant is subjected to carbonization reaction in a non-oxidizing atmosphere to prepare the ultrafine tungsten carbide powder. The ultrafine tungsten carbide powder prepared by the method has the advantages of small particle size, uniform particle size distribution, favorable dispersity, no pellet and high combined carbon content; and the production technique can easily control the quality and can implement mass production.

Description

Technical field

[0001] The invention relates to a preparation method of ultrafine tungsten carbide powder, which belongs to the research field of tungsten carbide-based hard alloys. Background technique

[0002] Tungsten carbide powder is an essential raw material for the preparation of tungsten carbide-based cemented carbide. The size and distribution of tungsten carbide grains in the cemented carbide have an important impact on the properties of the alloy. When the tungsten carbide grain size in the cemented carbide decreases to After micron level and nano level, the hardness and flexural strength of the material have been significantly improved, and the toughness has also been significantly improved. It is called "double high" cemented carbide. The preparation of tungsten carbide powder with fine grains, good dispersibility, uniform particle size distribution, and high compound carbon content is the key technology for preparing ultrafine cemented carbide. The current methods ...

Images