Pressure-resistant cast ZCuSn3Zn8Pb6Ni1FeCo alloy was developed by adding Fe and Co into ZCuSn3Zn8Pb6Ni1 matrix alloy

and effects of Fe and Co element on microstructure and properties of the alloy were investigated.The results reveal that

compared with that of ZCuSn3Zn8Pb6Ni1 matrix alloy

the microstructure of ZCuSn3Zn8Pb6Ni1FeCo alloy is basically composed of α-{Cu

Sn

Zn}phase and hard-brittle δ-Cu10Sn3 phase as well as single Pb precipitates also.In addition

there exist α-Fe phase and γ-Fe precipitates and CoCu2Sn

Fe3Co7

Fe4Zn9 strengthening phase which exhibits semi-coherent or coherent lattice orientation with the matrix in the ZCuSn3Zn8Pb6Ni1FeCo alloy.ZCuSn3Zn8Pb6Ni1 matrix alloy exhibits typical dendrite with average grain size of approximately 3 mm and tensile strength of 180～230 MPa

while ZCuSn3Zn8Pb6Ni1FeCo alloy exhibits equiaxed structure with average grain size of 20～60 μm and tensile strength of 400～450 MPa as well as elongation more than 20%.The macro-segregation of Tin which exists in CuSn3Zn8Pb6Ni1 matrix alloy is eliminated in the ZCuSn3Zn8Pb6Ni1FeCo alloy.