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通过测试合金导电率、抗拉强度、硬度及观察合金显微组织,研究了超声功率、超声时间以及施振温度3个参数变化对Sn-9Zn合金组织与性能的影响。结果表明,施加超声波后,合金组织细化明显,抗拉强度和硬度提高,而组织细化造成晶界增加,导致合金导电率略微降低。当超声功率、施振温度保持恒定,随着超声时间的增加,合金组织细化明显,抗拉强度、硬度大幅提高,导电率下降;当超声时间、施振温度保持恒定,随着超声功率的提高,合金组织略有细化,抗拉强度、硬度小幅提高,导电率小幅波动;当超声时间、超声功率保持恒定,随着施振温度的升高,抗拉强度、硬度先小幅上升,250℃后逐渐下降。较佳的试验方案为施振温度为250℃、超声波输出功率为700 W、超声时间为45 s。
The effects of ultrasonic power, ultrasonic time and temperature on the microstructure and properties of Sn-9Zn alloy were investigated by measuring the electrical conductivity, tensile strength, hardness and the microstructure of the alloy. The results show that the microstructure of the alloy is refined and the tensile strength and hardness increase obviously when the ultrasonic wave is applied. However, the grain boundary increases due to the refinement of the alloy, resulting in a slight decrease in the electrical conductivity of the alloy. When the ultrasonic power and the temperature were kept constant, the microstructure of the alloy was refined remarkably with the increase of ultrasonic time, the tensile strength and hardness increased greatly, and the conductivity decreased. When the ultrasonic time, the temperature of the applied vibration remained constant, When the ultrasonic time, ultrasonic power remained constant, with the increase of temperature, tensile strength, hardness first increased slightly, 250, the hardness increased slightly, ℃ after gradual decline. The best experimental scheme is that the temperature of vibration is 250 ℃, the ultrasonic output power is 700 W and the ultrasonic time is 45 s.