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Effect of Solution Treatment on Microstructure and Properties of Cu-9.5Ni-2.3Sn-0.5Si Alloy
Author(s): 
Pages: 29-32
Year: Issue:  4
Journal: Heat Treatment

Keyword:  Cu-9.5Ni-2.3Sn-0.5Si alloysolution treatmentmicrostructureconductivityhardness;
Abstract: Effect of solution treatment processes on microstructure,conductivity and hardness of Cu-9.5Ni-2.3Sn-0.5Si alloy was investigated by means of OM,SEM,EDS,X-ray diffractometer,SIGMASCOPE SMP10-type conductivity meter,Vickers hardness tester and so on.The results show that the grain size of the alloy increases with the raise of solution temperature,and that as the solution temperature becomes higher or the time at the temperature becomes longer,the conductivity first descends then increases,whereas the hardness decreases for the alloy.Furthermore,after the alloy is solution treated at 850 ℃for 2 h,the phases Ni2Si and Ni31Si12 produce and occupy a position where γ-(Cu,Ni)3 Sn phase will nucleate,the conductivity and hardness being 12.0%IACS and as high as 152 HV respectively.
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