Preparation method of high-density rare earth tungsten electrode

The invention discloses a preparation method of a high-density rare earth tungsten electrode. The method comprises the following steps of pretreatment, selecting raw material powder meeting requirements, and carrying out crushing treatment; pressing and forming, carrying out press forming treatment on the powder obtained in the pretreatment step to obtain a pressed blank; sintering, carrying out sintering treatment on the pressed blank to obtain a sintered blank; and hot isostatic pressing, carrying out hot isostatic pressing treatment on the sintered blank to obtain the high-density rare earth tungsten electrode. The preparation method has the advantages that the steps are well matched, the overall synergistic effect is obvious, the operation steps are simple and feasible, large-batch production is facilitated, the density of the prepared rare earth tungsten electrode product reaches 99.5% or above, the purity is high, the internal tissue structure is uniform, the grain size is fine,the strength is high, and