1. SHANGI Insititute for Advanced Materials（Nan Jing）Co.,Ltd，Nanjing 210046，China
2. School of Materials Science and Engineering，Nanjing University of Technology，Nanjing 211816，China
Synergistic finishing technology of electric field and flow field (EFSF) was used to polish tungsten sample. Surface morphology, surface roughness, sample thickness, surface glossness and surface hardness were analyzed by metallographic microscope, surface roughness meter, micrometer, gloss meter and microhardness tester. The results show that EFSF technology can significantly improve the surface quality of tungsten. It can obtain a highmirror surface with roughness of 0.154 μm and glossness of 223.1 GU.However, EFSF technology has a surface quality improvement threshold. When the roughness is reduced to a certain level (such as Ra<0.3 μm), the cost-effectiveness of “roughness improvement/material loss” is relatively low. At the same time, EFSF technology can obtain a high-quality surface with low stress and stable surface hardness. After processing for >10 minutes, the hardness is basically stable at 228.4 MPa. So EFSF technology can achieve high-mirror, low-damage, low-stress polishing surface of tungsten. This paper provides a new option for high-quality and environmentally friendly surface finishing of tungsten.