Novel high-consumption resistant multi-element rare earth tungsten electrode and preparation method thereof

Abstract

The invention discloses a novel high-consumption resistant multi-element rare earth tungsten electrode and a preparation method thereof. The materials contain four rare earth oxides, i.e. Re2O3, La2O3, CeO2 and Y2O3 in the weight ratio of 1:2:2:6, wherein the total content of the four rare earth oxides is 1.0 to 3.0 percent of the weight percentage of total metal. The preparation method comprises the following steps of: adenosine triphosphate (ATP) doping, two-stage hydrogen reduction, spark plasma sintering (SPS), and machining the materials into electrodes with various specifications through rotary forging and drawing, wherein the rotary forging cogging temperature is 1,550 to 1,600 DEG C. The electrode is high in density, good in welding performance, reasonable in preparation process, high in material yield and obvious in energy-saving effect, and harmful gas is not generated in a using process of the electrode.

Description

technical field [0001] The invention relates to a tungsten electrode material containing four rare earth elements and a preparation method thereof. The electrode can be used in inert gas shielded welding, plasma welding, cutting and spraying, or in special electric light sources. Background technique [0002] Tungsten electrodes are the key materials used in inert gas shielded welding and plasma welding, cutting, spraying and other equipment. At present, thoriated tungsten electrodes (including ThO 2 ) and cerium tungsten electrodes (containing CeO 2 ), in addition to a small amount of lanthanum tungsten electrodes and yttrium tungsten electrodes. [0003] The above rare earth tungsten electrode materials have their own advantages and disadvantages: thorium is a radioactive element, so the production and use of thoriated tungsten electrodes will bring radioactive hazards to the environment and human health. Cerium tungsten electrode (containing CeO 2 ) has good processing...

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Problems solved by technology

[0006] In the present invention, the rare earth tungsten electrode replaces the radioactive thorium with various rare earth elements, and adds Re to improve the plastic processing performance. 2 o 3 The adoption of the new SPS process not only makes the welding performance of the electrode material reach or exceed that of the thoriated tungsten electrode, but also solves the problems of difficult processing and low yield of tungsten materials with high content of rare earth

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