Influence of electrical conditions on performance of electrical discharge machining with powder suspended in working oil for titanium carbide deposition process
Influence of electrical conditions on performance of electrical discharge machining with powder suspended in working oil for titanium carbide deposition process
复制标题
电工条件对碳化钛沉积工艺油悬浮粉末放电加工性能的影响
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Masayuki Suzuki
中科院分区：
文献类型：
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作者：
K. Furutani;Hiromichi Sato;Masayuki Suzuki
研究了放电电流和脉冲宽度对工作油中悬浮钛粉电火花加工碳化钛沉积过程的影响。虽然已经研究了电条件对去除电火花的影响，但还没有讨论沉积的标准。在实验中，使用1 mm的铜棒作为电极，以防止工作油从电极和工件之间的缝隙中冲洗。钛粉与工作油中的裂解碳反应，在工件表面沉积一层TiC。沉积或去除的主要判据是脉冲宽度为10μ的S的放电能量。TiC层的厚度在一定的放电电流和脉冲宽度时达到最大。较大的放电能量和功率促进了放电产生的热和压力的去除。去除模式1中的富钛表面有裂纹，去除模式2中只去除了一个工件，最大硬度可达2000Hv。在其表面下约10μm处，由于TiC的弥散分布，工件也发生了硬化。最硬沉积的加工条件与最高沉积的加工条件不一致。因此，应优化沉积的放电电流和脉冲宽度。
This paper describes the influence of the discharge current and the pulse duration on the titanium carbide (TiC) deposition process by electrical discharge machining (EDM) with titanium (Ti) powder suspended in working oil. Although the influence of the electrical conditions for removal EDM has been investigated, the criteria for deposition have not been discussed. In the experiments, a 1-mm copper rod was used for an electrode to prevent the flushing of working oil from the gap between the electrode and a workpiece. Ti powder reacted with the cracked carbon from the working oil, then depositing a TiC layer on a workpiece surface. A major criterion of the deposition or removal was the discharge energy over a pulse duration of 10 μs. A thickness of the TiC layer became the maximum at a certain discharge current and pulse duration. Larger discharge energy and power promoted the removal by heat and pressure caused by the discharge. The removal was classified further into two patterns; cracks were observed on the Ti-rich surface in removal pattern 1 and a workpiece was simply removed in removal pattern 2. The maximum hardness of the deposition was 2000 Hv. The workpiece about 10 μm beneath its surface was also hardened because of the dispersion of TiC. The machining conditions for the hardest deposition did not coincide with those for the highest one. Therefore, the discharge current and pulse duration should be optimized for the deposition.