GH4169 super alloy has a wide application in the field of aeronautics and astronautics, in order to realize the high quality and fast processing of the complex workpieces with electrochemical machining (ECM), we have studied the electrochemical dissolution characteristics of GH4169 super alloy in composite electrolyte, and explored the rule of influence on machining voltage, feed speed, electrolyte pressure for the machining gap (SG), material removal rate (MRR) and surface roughness (Ra). The results showed that under the composite electrolyte of 10%NaCl+16%NaNO3+4%NaClO3, 17.5V machining voltage and the electrolyte pressure 0.8MPa; temperature 30°C, with 1.0mm/min cathode feed speed, achieved high efficiency and high surface quality machining, surface roughness reached to 0.8μm.
An experimental system has been designed and built to study the electrical characteristics in an asymmetric capacitive coupled radio frequency (RF) discharge excited copper ion laser at moderate gas pressures. The system consists of laser chamber, thru-line integrated voltage and current probe, matching circuit and electrical measurement system. There are some results of electrical measurements carried out in a helium discharge at 13.56 MHz. Although this system has been specifically designed and built to measure the discharge parameter of the capacitive RF-excited copper ion laser in moderate-pressure helium gas, it can operate over a wide range of gas pressure and a wide range of driving frequency and gas components. It is simple, cheap, accurate and real-time.
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