Abstract:In this paper, a new type of water-in-oil (W/O) emulsion suitable for coupling electrical pulse and ultrasonic treatment was developed, and the influence of water content on the viscosity and conductivity of the W/O emulsion was explored. It is found that when the water content is 40% and below, the W/O emulsion can maintain low electrical conductivity, have excellent dielectric properties, and better flow properties. Inconel 718 alloy was treated with water, W/O emulsion with mass fraction of 20% and 40%, and the surface morphology, wear resistance and corrosion resistance after treatment were investigated. The results showed that the surface of the sample treated with W/O emulsion with mass fraction of 40% is the smoothest, and has the best wear resistance and corrosion resistance. Compared with the substrate, the friction coefficient is reduced by 0.267, the wear loss is reduced by 43.2%, the corrosion current density is reduced by 86.9%, and the impedance is increased by 45.4%. The W/O emulsion can effectively fill the gap between the carbon brush and the sample, avoid the occurrence of discharge phenomenon. At the same time, the W/O emulsion can provide excellent lubrication effect, which can weaken the friction between ultrasonic vibration head and sample surface, and finally obtains better surface quality.
金辉,纪仁杰,王保坤,刘永红. 油包水型工作液对超声电脉冲复合强化镍基高温合金表面的影响研究[J]. 航空制造技术, 2022, 65(15): 51-58/63.
JIN Hui, JI Renjie, WANG Baokun, LIU Yonghong. Study on Surface of Nickel Base Superalloy Strengthened by Coupled Ultrasonic and Electric Pulse With Water-in-Oil Working Fluid[J]. Aeronautical Manufacturing Technology, 2022, 65(15): 51-58/63.