Study on precipitation characteristics of Cu-Zn-Cr alloy

The microstructure,hardness and tensile property of Cu-17Zn-0.4Cr(wt %)alloy prepared by semi-continuous casting were studied by SEM,TEM and tensile tests.The results show that Cu-Zn-Cr alloys are typical precipitation hardening alloy.An optimum processing technology for the alloy is obtained based on the experiments,which is that the alloy is rapid hot rolled at 930℃ and quenched in water,and then aged at 450℃ for 1 hour.Rapid hot rolling and quenching can hold the effects of working hardening.