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  

Study on Surface of Nickel Base Superalloy Strengthened by Coupled Ultrasonic and Electric Pulse With Water-in-Oil Working Fluid

作　　者：金辉[1] 纪仁杰[1] 王保坤 刘永红[1] JIN Hui;JI Renjie;WANG Baokun;LIU Yonghong(China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东),青岛266580

出　　处：《航空制造技术》2022年第15期51-58,63,共9页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(51675535);青岛西海岸新区科技计划源头创新专项(2020–82);山东省高等学校优秀青年创新团队(2019KJB016);山东省重点研发计划项目(2019GGX104068)。

摘　　要：研发出适合超声电脉冲复合处理的新型油包水型工作液,探究了含水量对工作液黏度和电导率的影响,发现当含水量(质量分数)在40%及以下时,油包水型工作液能够保持较低的电导率,具有优秀的介电性能以及较好的流动性能。使用20%和40%含水量的油包水型工作液对Inconel 718合金进行处理,对处理后的表面及截面形貌、耐磨损性能、耐腐蚀性能进行检测和分析。研究结果表明,使用含水量为40%油包水型工作液处理后试样的表面最光滑,同时具有最优的耐磨性以及耐腐蚀性。相对于基体,摩擦系数降低0.267,磨损量降低43.2%,腐蚀电流密度降低86.9%,阻抗提升45.4%。油包水型工作液能够有效地填充碳刷与试样之间的间隙,避免放电现象的产生。同时提供极佳的润滑效果,减小超声振动头与处理试样表面间的摩擦,最终获得更好的表面质量。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.

关 键 词：Inconel 718合金 超声处理 电脉冲 油包水型工作液 耐磨性 耐腐蚀性 

分 类 号：TG663[金属学及工艺—金属切削加工及机床] TG132.3[一般工业技术—材料科学与工程]