Al的DCSPTIG焊的研究-加工工艺-机电之家网加工工艺栏目 关键词 ： 铝；直流正极性；氩弧焊[gap=805]Keywords ： Al；direct current electrode negative polarity；tungsten-inert-gas arc weldingg
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并简述了直流正极性焊接铝合金所存在的问题和应用前景。
The existing problems and application prospects of Aluminium welding with straight polarity direct current method are sketched out in this paper.
一个正极性的直流电压加于该电极上。
A positive polarity dc voltage is applied to the electrodes.
直流电压下X射线对气隙、油隙放电的激发过程存在明显的“滞后”现象，即：正极性电压下X射线照射首先抑制放电的发生；
Under DC voltage the restraint and time lag phenomena of partial discharge (PD) in cavities or oil gap by X ray irradiation were investigated.
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