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通过采用恒定的熔体温度、超声功率及频率、施振深度,对Pb-Ag合金熔体施振不同时间,探讨超声处理对Pb-Ag合金的显微组织及电化学性能的影响。结果表明,在熔体温度为370℃时,熔体粘度适宜,空化效应和声流作用明显,短暂的施振处理(1~2 min)即可达到理想的细晶效果,而长时间的超声波处理(3~5 min)只会引起熔体内较大的热效应,使细小的晶粒重熔,从而使得晶粒粗大。通过适宜的超声处理,Pb-Ag合金显微组织显著细化、均化,电化学性能有所提升,其中电阻率下降12.95%,极化电位负移290 m V,槽电压下降1.77%,达到了一定的节能降耗的目的,为今后制备高性能低能耗的Pb-Ag合金电极奠定了基础。
The effects of ultrasonic treatment on the microstructure and electrochemical properties of Pb-Ag alloys were investigated by using constant melt temperature, ultrasonic power and frequency, and the depth of vibration. The results show that when the melt temperature is 370 ℃, the melt viscosity is suitable, and the cavitation effect and sound flow effect are obvious. The short-time vibration treatment (1 ~ 2 min) can achieve the ideal fine grain effect. However, Ultrasonic treatment (3 ~ 5 min) will only cause a large thermal effect in the melt, so that the fine grain remelting, making coarse grains. Through appropriate ultrasonic treatment, the microstructure of Pb-Ag alloy was refined, the homogenization and electrochemical properties were improved. The resistivity decreased by 12.95%, the polarization potential shifted by 290 mV, the cell voltage decreased by 1.77% A certain amount of energy saving purposes for the future preparation of high performance and low energy consumption of Pb-Ag alloy electrode laid the foundation.