The effects of different pulse parameters and cooling conditions on the solidified structure and mechanical properties of ZA27 alloy were investigated.The results show that the solidified structure and mechanical properties of the alloy can be improved by controlling the parameters of the pulsed magnetic field and cooling conditions.When the pulse voltage is at 0

3

00 V

with the increase of pulse voltage

the primary phase in the ZA27 alloy is transformed gradually from coarse dendrite to fine spherical or rosette structure

and the compressive strength is increased gradually

where the maximum strength is increased by up to 39.6%

compared with that of the alloy without pulse magnetic field treatment.When the pulse frequency is at 1

1

0 Hz

with the increase of pulse frequency

the primary phase in the alloy is refined gradually

and the compressive strength is increased gradually.With the increase of pouring temperature at 490

5

80℃ or the mold temperature at 10

4

00℃

the primary phase in the alloy is refined at first and then coarsened

and the turn point are 520 ℃ and 200 ℃

respectively.As a whole

with the pouring temperature or mold temperature increase

the compressive strength of the alloy is increased gradually.