By measuring and analyzing the microhardness of ZL205 Aalloy at different vertical depths from the end face of the ultrasonic horn at different pulse ultrasonic power

the effects of pulsed ultrasonic power on microhardness of different parts were analyzed.The relationship between the microhardness of ZL205 Aalloy and the pulse ultrasonic power as well as depth was established.The results reveal that the microhardness is increased firstly and then decreased with the increase of the pulse ultrasonic power at the same distance from the end face of the ultrasonic horn.Under the same pulsed ultrasonic power condition

the microhardness of ZL205 Aalloy is decreased firstly and then increased with the increase of the depth of vertical zone.The maximum microhardness of the alloy samples can be observed at0 mm in depth with power of 600 W

while the core area of the alloy sample belongs to microhardness weak zone after ultrasonic vibration.