ALLOYED TUNGSTEN PRODUCED BY CHEMICAL SEDIMENTATION FROM GAS PHASE Russian patent published in 2010 - IPC C22C27/04 C22C32/00 C23C16/32 B23B15/00 

Abstract RU 2402625 C2

FIELD: metallurgy.

SUBSTANCE: invention refers to wear-, erosion- and chemically resistant material on base of tungsten alloyed with carbon; also carbon in terms of total weight of material amounts from 0.01 wt % to 0.97 wt %. Material contains a matrix of tungsten with dispersed nano-particles of tungsten carbide of dimension not more, than 50 nm, mainly not more, than 10 nm. Material is produced by chemical sedimentation from gas phase onto a substrate. The substrate is arranged in the reactor of chemical sedimentation from the gas phase. The substrate is heated in a mixture of gases containing hexafluoride of tungsten, hydrogen, gas containing carbon, and, not necessary, inert gas. Also carbon containing gas is preliminary actuated by heating to temperature 500-850°C. Further, the substrate is cooled till there is formed a layer consisting of tungsten alloyed with carbon and fluorine.

EFFECT: high hardness and impact resistance.

37 cl, 10 dwg, 1 tbl, 9 ex

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RU 2 402 625 C2

Authors

Zhuk Jurij

Aleksandrov Sergej

Lakhotkin Jurij

Dates

2010-10-27Published

2005-10-11Filed