Infiltration Method for Producing Magnesium Carbon Tungsten Copper Alloy Electrode Material

The present invention provides a tungsten copper alloy magnesium infiltration method for manufacturing carbon electrode material, characterized in that: it processes include raw material preparation, mixing, forming, reducing treatment, pre-sintering, high temperature sintering, copper infiltration, finished, follow these steps:

1) Material preparation: purity tungsten powder ≥99.99%, grain size of tungsten powder ≤2.9μm, the particle size of nickel powder ≤1.74μm, carbon free carbon ultrafine powder, magnesium powder, nickel powder were used toner the chemical coating method for coating;

2) Mixing: the tungsten powder, chemically coated magnesium and carbon loading efficiency enclosed blender mixing, mixing time 18 to 24 hours;

3) Forming: the mixed uniformly into the steel alloy powder, and with the press pressed into billet, billet size according to user requirements;

4) Reduction treatment: one by the pressure of a good billet is loaded with a crane with a hydrogen gas through a sintering furnace, reduction treatment is divided into four phases: Phase I: reduction temperature 200 ~ 300 ℃ 0.5 to 1 hour second time stage: reduction temperature 350 ~ 500 ℃ ~ 1 hour time of 0.5 Third stage: the reduction temperature 55 0 ~ 700 ℃ for 1 to 1.5 hours Fourth stage: reduction temperature 750 ~ 950 ℃ for 2 hours;

5) Pre-sintering: after reduction of the billet after pre-sintering at 1000 ℃ temperature and hydrogen protection, pre-sintering time is 2 hours;

6) And the high temperature sintering of copper infiltration: After pre-sintered billet after high temperature sintering at 1100 ~ 1600 ℃ temperature and hydrogen protection, high temperature sintering time is 2 to 3 hours; while continuously sintered at a high temperature copper infiltration; final power natural cooling;

7) Finished: according to user requirements can be processed into various shapes electrodes.

Tungsten carbon present invention provides a magnesium copper alloy infiltration method for producing an electrode material, the electrode of the present invention is manufactured with a uniform composition, good anti-wear extreme anti-erosion resistance, good electrical conductivity, etc. advantages.


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