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介绍了喷射电铸快速成形的基本原理,制备了纳米晶电极铜,分别研究了纳米晶铜电极和粗晶铜在不同电火花加工参数的工具电极损耗性能。运用扫描电子显微镜(SEM)和X-ray衍射等现代分析手段对工具电极的微观结构和成分进行分析。结果表明,喷射电铸能显著提高极限电流密度,细化晶粒,铜沉积层具有纳米晶微观结构。纳米铜电极损耗随着脉冲宽度增大而减小,随峰值电流的增大而增大,且纳米晶铜的电极损耗明显小于粗晶铜。
The basic principle of rapid prototyping by jet electroforming was introduced and the nanocrystalline electrode copper was prepared. The tool electrode wear performance of nanocrystalline copper electrode and macrocrystalline copper at different EDM parameters were studied respectively. The microstructure and composition of the tool electrode were analyzed by modern analytical methods such as scanning electron microscopy (SEM) and X-ray diffraction. The results show that the spray electroforming can significantly improve the limiting current density, grain refinement, copper deposition layer with nanocrystalline microstructure. The loss of nano-copper electrode decreases with the increase of pulse width and increases with the increase of peak current, and the electrode loss of nanocrystalline copper is obviously smaller than that of coarse-grained copper.