The ZCuSn10 tin bronze with equiaxed grain structure was prepared by strain induced melt activated method such as forging-remelting or rolling-remelting process.Firstly

ZCuSn10 tin bronze was poured

and samples were cut from ingot.Secondly

the samples were cool-rolled with two passes or four passes

or forged after holding at 450℃for 15minutes

then the samples prepared were heated up to 800℃ or 850 ℃for 10 minutes

and then quenched in water.The microstructure of the alloy prepared by SIMA method was compared with annealed microstructure and cast microstructure of ZCuSn10 tin bronze directly reheated then water quenched.The results indicate that equiaxed structure of ZCuSn10 tin bronze can be obtained by SIMA process

in which volume fraction of eutectoid structure is 16% at most.Comparing with annealed microstructure and cast microstructure of ZCuSn10 tin bronze directly reheated then water quenched

the average grain diameter is decreased to 80

9

0μm from 250

300μm

and shape factor is decreased to 1.75 from 1.97.Deformation process plays a critical role in grain refinement and spheroidization during SIMA process for preparing the equiaxed structure of ZCuSn10 tin bronze.With deformation or remelting temperature increases

the size and shape of solid phase in microstructure of ZCuSn10 tin bronze are decreased and spheroidized increasingly

and volume fraction of eutectoid structure is increased.