Preparation of Tungsten Cavernous

The present invention provides a method for preparing a tungsten sponge. Belonging to the microwave electric vacuum device manufacturing technology, as follows:

1) The low-temperature vacuum furnace tungsten powder calcined degassing;

2) Tungsten powder filling and cold isostatic preparing tungsten blanks;

3) Low-temperature sintering furnace hydrogen tungsten blanks, roughing, high temperature sintering furnace hydrogen tungsten blanks;

4) Hydrogen furnace leaching copper tungsten blanks obtained tungsten rod, tungsten copper rod finishing, chemical and high-frequency method to remove the copper tungsten copper, tungsten cavernous finally obtain the required parts.

Note: The low temperature in a vacuum furnace burn-degassed, increase one pair of tungsten powder, high-speed jet grading treatment processes, removal of ultrafine particles of tungsten powder and coarse particles to obtain tablets marked by the tungsten powder tungsten grain size grading close powder.

The process of the present invention is commercially available micron tungsten powder particle size is greater than about 85% below 2 microns ultrafine particles of tungsten and 90% of the effective removal of coarse particles, the ultrafine particles to reduce clogging of the pores between the particles of tungsten, and the coarse the particles tend to form coarse voids phenomenon which achieves the purpose of uniform porosity sponge tungsten.


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