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研究了不同处理温度(300,400和450℃)、不同超声功率(400,600和800W)以及不同处理时间(3,5,7和10min)对Pb-20%Sn合金电阻的影响.结果表明,超声处理对Pb-20%Sn合金熔体的电阻有显著的影响.超声作用使熔体电阻瞬间减小,停止超声作用后,电阻瞬间增大,但并未恢复到初始值,与初始电阻相比有一个减小量,该电阻维持一段时间后才缓慢恢复到初始值.超声功率越大,超声作用效果越显著,电阻瞬态变化量和持久性变化量越大,有效时间也越长.随着温度升高,电阻瞬态变化量和持久性变化量均增大,超声作用有效时间先增大后减小.随着超声作用时间的延长,超声作用效果逐渐增大,但存在一个饱和作用时间.
The effects of different treatment temperatures (300, 400 and 450 ℃), different ultrasonic powers (400, 600 and 800W) and different treatment times (3, 5, 7 and 10min) on the resistance of Pb- Pb-20% Sn alloy melt resistance has a significant impact.Ultrasonic effect so that the melt resistance decreases momentarily, stop the ultrasonic effect, the resistance momentarily increased, but did not return to the initial value, compared with the initial resistance of a Reduce the amount, the resistance to maintain a certain period of time before slowly recovering to the initial value.When the ultrasonic power is greater, the effect of ultrasonic effect is more significant, the greater the resistance transient changes and persistent changes, the effective time is longer.With the temperature The change of transient resistance and persistence of resistance all increased, and the effective time of ultrasonic action firstly increased and then decreased.With the increase of ultrasonic action time, the effect of ultrasonic action increased gradually, but there was a saturation action time.