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| 摘要: |
| 从带电离子在电磁场中的受力行为和运动状态入手，试验研究了磁场对阳极溶解速度、产物扩散速度、材料去除速度、极间电流的影响，最后还分析了磁场对电解液的搅拌作用。研究表明由于洛仑兹力和电场力的共同作用，改变了离子的运动轨迹，提高了峰点或侧面的溶解速度和产物的扩散速度，从而有效地改善了表面粗糙度；峰点的去除速度远大于无磁场时的去除速度，谷点的去除速度远小于无磁场时的去除速度，因此从微观上说磁场辅助电化学抛光对基体的损害较小，精度保持性好；磁场的搅拌加快了液相传质，改变了电化学反应，使极间电流强度增大，抛光效率提高。 |
| 关键词: 试验研究 磁场 电化学抛光 表面粗糙度 |
| DOI： |
| 分类号:TG175 |
| 基金项目:国家自然科学基金资助项目(59775073) |
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| Experimental Research on Electrochemical Polishing with Magnetic Field |
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FANG Jian-cheng JIN Zhu-ji XU Wen-ji ZHOU Jin-jin
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| Abstract: |
| Proceeding from the forced behavior and motion state of charged ions in electromagnetic field, the effect of magnetic field on dissolving speed of anode, diffusion velocity of product, removal rate of materials and interelectrodes current density was studied through experiments, then the agitation of electrolyte by magnetic field was discussed as well. The results show that (1) both the Lorentz?force and electric field force, changed the motion track and direction of ions, raised the dissolving velocity and product diffusion velocity on the peak points or side faces of the anode, and then the surface roughness was improved efficiently. (2) the magnetic field, enharsced the polishing speed at peak points rather than at valley points, that if beneficial to reduce initial wear when the machined workpiece was adopted, this phenomenon is also of advantage to reduce damage of substrate. (3) The agitation effect of magnetic field enhanced the liquid-phase convection, ions diffusion and transference, accelerated the electrochemical reaction speed, therefore the current intensity was increased and the finishing efficiency was also raised. |
| Key words: magnetic field,electrochemical polishing,surface roughness |
