本发明公开了一种抗形变钨板及其 制备方法，所述抗形变钨板包括 0.0045wt％-0.007wt％的钾元素， 0.55wt％-1.45wt％的金属氧化物以及余 量为钨和不可避免的杂质；所述金属氧化 物选自氧化镧、氧化钇、氧化锆或氧化钍 中的至少一种，分散在所述抗形变钨板的 钨晶粒的晶界上，形成第二相粒子，所述 K 进入钨晶粒的晶格中。本发明的制备方 法包括配料、粉末压制、高温烧结、热轧 制、高温热处理等步骤，采用掺钾钨粉及 特定金属氧化物为原料，经过一系列工艺 调控制备出一种抗形变钨板。该抗形变钨 板具有更佳的高温抗变形性能，更长的使 用寿命，可应用于现行钨板应用的领域。

The present invention discloses an anti-deformation tungsten plate and a method for its preparation, said anti-deformation tungsten plate comprising 0.0045wt%-0.007wt% of elemental potassium, 0.55wt%-1.45wt% of metal oxides and a balance of tungsten and unavoidable impurities; said metal oxides are selected from at least one of lanthanum oxide, yttrium oxide, zirconium oxide or thorium oxide, dispersed on the grain boundaries of said anti-deformation tungsten plate said K enters the lattice of the tungsten grains. The preparation method of the present invention includes the steps of dosing, powder pressing, high temperature sintering, hot rolling, high temperature heat treatment, etc. A deformation resistant tungsten plate is prepared by a series of process controls using potassium doped tungsten powder and specific metal oxides as raw materials. The deformation-resistant tungsten plate has better high-temperature deformation resistance and longer service life, and can be applied to the existing tungsten plate applications.