Study on the microstructure and sintering properties of Cu-Sn powder prepared by the premixing method and prealloying method
Cu-Sn powders were prepared by pre-mix and pre-alloy process,the microstructure and phase changes of Cu-Sn alloy were studied after sintering,and the sintering properties of Cu-Sn powders prepared by these two methods were tested and compared.The experimental results show that the microstructure of pre-mixing CuSnl0 and CuSn20 is composed of α phase and α+δ eutectic tissue after sintering,while that of pre-alloy CuSn10 is αphase.After sintering,the pre-mixed Cu-Sn green compacts expand,on the contrary the pre-alloyed green com-pacts shrinkage.In addition,the strength,oil content and effective oil content of the pre-alloyed Cu-Sn parts are higher than those prepared by the pre-mixing method.
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