Process for preparing cemented hard alloys based on tungsten...

Details Process for preparing cemented hard alloys based on tungsten... Process for preparing cemented hard alloys based on tungsten...

C - Chemistry, Metallurgy

22

C

25/132, 57/17, 2

C22C 29/00 (2006.01)

Patent

CA 1080431

Abstract of the Disclosure Cemented tungsten carbides are produced by reducing tung- sten anhydride first to prepare tungsten dioxide at a tempera- ture ranging from 750 to 1,300°C and reducing thereafter the obtained tungsten dioxide to produce metallic tungsten at a temperature ranging from 1,000 to 1,600°C, the obtained metal- lic tungsten being carbidized at a temperature ranging from 1,800 to 2,000°C, the tungsten carbide being mixed with a bin- der metal, the obtained mixture being ground and pressed, and the cemented carbide being sintered. The invention permits obtaining an alloy whose plastic deformation is 2-4 times better than that of the known cemen- ted carbides.

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