Abstract
The spherical tungsten powder was prepared by radio frequency plasma system with irregular tungsten powder as raw materials and the effect of spherical tungsten powder was evaluated by laying powder and forming result. In the process of preparing spherical tungsten powder, the effects of process parameters (feeding rate, feeding position) and raw tungsten powder on spheroidization results were studied. In the aspect of laying powder experiment, the effects of powder characteristics and layer thickness on laying powder effect were studied. The morphologies, particle size distribution, flowability, apparent density and tap density of the tungsten powder before and after spheroidization were characterized by scanning electron microscopy (SEM), laser micron sizer, BT-100 multifunctional powder physical property tester. The results show that tungsten powder is regularly spherical and has smooth surface after spheroidization, and the spheroidization rate can reach 100%. And the flowability, apparent density and tap density are improved obviously. The better the flowability of spherical tungsten powder with high spheroidizing rate, the better the effect of laying powder. With the increase of layer thickness, the effect of laying powder is improved gradually. And the thin-walled parts prepared by spherical tungsten powder with suitable particle size have low surface roughness and high dimensional accuracy.
| Translated title of the contribution | Preparation and Application of Spherical Tungsten Powder |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 2594-2601 |
| Number of pages | 8 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 48 |
| Issue number | 8 |
| State | Published - 1 Aug 2019 |
| Externally published | Yes |