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[Knowledge of Tungsten Products] Tungsten Carbide Powder
Tungsten carbide powder is the intermediate in the line from W powder to cemented carbides. It can be produced from different raw materials and by different processes. By far the biggest percentage is manufactured by the conventional method - carburization of tungsten powder - and covers the widest range of powder qualities in regard to average particle size (0.15?2祄). All other methods in use yield very fine or very coarse powder grades.
The conventional process of carburisation comprises mixing of the respective tungsten powder of desired particle size with high purity carbon (lamp black or graphite) and reacting at temperatures between 1,300 to 1,600癈 in hydrogen atmosphere. The average particle size and particle size distribution of the original tungsten powder determine size and distribution of the WC powder.
The final carbon content of the WC Powder depends on the production mode of the hardmetal producer and is one item of the rigid specification, and varies from slightly sub-stoichiometric to stoichiometric (6.13% C) to slightly over-stoichiometric. But not only is the carbon content specified but also a series of physical properties including: average particle size, particle size distribution, apparent (bulk) density and homogeneity.
Tungsten Manufacturer & Supplier: www.whyksm.com
Tel.: 86-813-5701766 Fax: 86-813-5703382High temperature carburised WC powders (1,700?,200 癈) are usually coarse 10 to 50祄, but sometimes also 5 to 10祄 grades are treated that way. The percentage of high temperature WC is small.
Tungsten carbide powder is packaged in sealed polyethylene-lined steel drums.
Tungsten Manufacturer & Supplier: www.whyksm.com
Tel.: 86-813-5701766 Fax: 86-813-5703382
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