本发明公开了一种组织均匀的高致密度纯钨制品制备方法,以氢还原法制备的平均粒度1~3μm钨粉为原料,预处理后获得窄粒度分布细钨粉,再经压制、烧结而获得,所述窄粒度分布细钨粉为D(0.5)为2~4μm,D(0.9)<6μm,粒径1μm以下的超细颗粒含量<10%,且粒度分布窄、分散性好的细钨粉。制得密度≥18.5g/cm3,相对密度≥96%,且晶粒大小均匀,平均晶粒尺寸≤40μm的棒材或板材等纯钨烧结制品。制备的钨制品具有晶粒较细且均匀分布、致密度高等特点,易实现批量生产,流程短、成本低。解决了现有工艺方法制备纯钨制品密度不高、组织不均匀等不足。
The invention discloses a preparation method of a uniformly organized high-density pure tungsten product. The tungsten powder with an average particle size of 1 to 3 μm prepared by a hydrogen reduction method is used as a raw material. It is obtained that the fine tungsten powder with a narrow particle size distribution has D(0.5) of 2~4μm, D(0.9)<6μm, the content of ultrafine particles with a particle size of 1μm or less <10%, and has a narrow particle size distribution and good dispersibility. Fine tungsten powder. The obtained pure tungsten sintered products such as bars or plates with density ≥ 18.5 g/cm3, relative density ≥ 96%, uniform crystal grain size, and average crystal grain size ≤ 40 μm. The prepared tungsten product has the characteristics of relatively fine crystal grains, uniform distribution, high density, etc., is easy to realize mass production, has short flow and low cost. It solves the problems of low density and uneven structure of pure tungsten products prepared by the existing process methods.