Method of making tungsten carbide based hard metals

Details Method of making tungsten carbide based hard metals Method of making tungsten carbide based hard metals

2005-04-12

2005-04-12

Mai, Ngoclan T. (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

C252S391000, C252S363500, C419S018000, C419S030000, C419S040000

Reexamination Certificate

active

06878182

ABSTRACT:
The present invention relates to economic and environment-friendly slurries and their preparation, handling, and spray drying for the production of cemented carbide based hard metals. The slurry is ethanol-water based and contains metallic and metal carbide raw materials as well as polyethylene glycol (PEG) and a very low concentration of polyethylenimine (PEI). The concentration of PEI is 0.01-<0.1% of the raw material weight. As a result, low-viscous slurries are produced which require less use of ethanol, energy, manpower and equipment time in their preparation, handling, and spray drying.

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