一种制备大尺寸钨制品的方法，属于粉末冶金技术领域。首先以还原钨粉为原料，采用气流磨处理得到细粒径钨粉。然后通过喷雾造粒工艺制备得到钨粉团聚体，团聚体呈完全球状且粒度分布可控，能达到规则的粉末堆积状态。采用冷等静压方式将钨造粒团聚体压制成生坯。接着采用低温缓慢升温而高温快速升温的烧结方法，得到高致密度、良好尺寸均匀性的大尺寸钨板坯。低温烧结阶段缓慢升温，使坯体充分还原以降低坯体内氧含量从而保持其烧结活性，高温烧结阶段快速升温，能减少晶粒长大。该制备方法解决了以往大尺寸厚钨板容易出现局部疏松、裂纹的问题，制备出的钨板坯厚度在30mm左右，致密度达到97%以上，且能保证板坏表面和中心位置的尺寸均匀性。

A method for preparing large-size tungsten products belongs to the technical field of powder metallurgy. First, the reduced tungsten powder is used as the raw material, and the fine particle size tungsten powder is obtained by jet milling. Then, agglomerates of tungsten powder are prepared through a spray granulation process. The agglomerates are completely spherical and have a controllable particle size distribution, which can achieve a regular powder accumulation state. The tungsten granulated agglomerate is pressed into a green body by cold isostatic pressing. Then, a sintering method of slowly heating at low temperature and rapid heating at high temperature is adopted to obtain a large-size tungsten slab with high density and good size uniformity. The temperature rises slowly in the low temperature sintering stage, so that the green body is fully reduced to reduce the oxygen content in the green body so as to maintain its sintering activity. The rapid temperature rise in the high temperature sintering stage can reduce the growth of crystal grains. This preparation method solves the problem of local looseness and cracks in large-size thick tungsten plates in the past. The prepared tungsten slab has a thickness of about 30mm and a density of over 97%, and can ensure that the size of the bad surface and the center position of the plate is uniform. sex.