Cu-20 Pb hypomonotectic alloys were prepared under different strong pulse currents

and the structure and phase composition

microhardness and anti-friction properties of hypomonotectic alloy were analyzed.The results reveal that Cu-20 Pb hypomonotectic alloys are mainly composed of matrixα-Cu and Pb phase in matrixα-Cu.When the pulse peak current is 0

the hypomonotectic alloys’ dendrite is sparse with large crystal grain size and less uniformity

while the peak current is 1 500 A

the grain size of the alloy reaches the smallest with good uniformity

meanwhile

average hardness reaches 58.04 HV0.49

increased by 28.58%compared with that of ones with 0 peak current.When the peak current is in the range of 0～1 500 A

with increasing in current

the grain size is decreased while average hardness is increased.However

with peak current increased from 1 500 Ato 2 000 A

grain size is increased while hardness is decreased.Friction and wear experiments reveal that the hypomonotectic alloy presents a satisfied friction performance with the pulse peak current of 1 500 A.