Preparation of Adding the Tungsten Oxide Alloy Electrode Material in Alloy

The present invention provides a process for the preparation of an alloy of tungsten oxide electrode material is added, concrete steps are as follows:

1) First, added tungsten oxide powder in a weight ratio of 0.1 to 1% carbon and 1 to 5% of tungsten oxide powder to form one or several alloying elements;

2) Then added in a weight ratio of 0.5% to 4% of the ThO2, one or both of CeO2, Y203 or La203 low work function oxide powder mixing;

3) The strip is cold-pressed billet growth in 1300-1500K presintered hydrogen atmosphere;

4) Finally,sintered at 2800-3500K next, and then the rotary forging, rolling, drawing, polishing process to achieve the desired electrode size.

Since the tungsten powder in a small amount of alloying elements added to the balance arcing oxide added during the decomposition process, control the decomposition rate of the oxide, sintering and arc stability during high-temperature growth of the tungsten grains to reduce the oxide electrode loss and improve stability of the arc, increasing the electrode surface area of ​​the liquid tungsten arc surface tension and reduce the loss of tungsten.


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