Thoriated Tungsten Electrode Composition and Performance

Made of tungsten and thorium dioxide composed of tungsten alloy , referred to as thorium tungsten . Thorium dioxide content of the alloy used in the 0.7% to 2% . Thorium dioxide thermal stability, greatly enhanced tungsten alloy high temperature strength , the recrystallization temperature and high temperature creep properties , tungsten thorium further reduces the electron work function , and enhance the ability of the alloy thermal electron emission . Preparation of tungsten thorium alloys doped tungsten wire is similar . Thorium tungsten alloy wire as a heat emission of the filament and cathode tubes are widely used in thorium- tungsten alloy rod then as a variety of arc welding , cutting and arc electrode material caused . Tungsten- thorium alloy is an important drawback is that containing a radioactive thorium dioxide , in the processing and use of radioactive contamination.

Radioactive thorium tungsten electrode , its production and use of environmental pollution harm to human health and therefore need to be replaced new electrode products , rare earth tungsten electrode welding performance has been used as an alternative to thoriated tungsten electrodes attention is paid to review research group in rare Earth tungsten electrode course , through to rare earth element tungsten electrodes , binary composite rare earth tungsten electrodes , tungsten electrodes rare earth ternary complex research , the current through the Beijing tungsten & Molybdenum material Factory co- broke multiple composite rare earth tungsten electrodes industrialized production technology, the production of such electrodes .


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