(14)L.R.Woodyatt,Jr:Trans,TMS-AIME,1966,Vol,236,P.P. 519~27 (15)C.T.Sims,J.Metals,1969,Vo1.21,m12,P.P.27-42 (16)H.J.Murphy,J.Motals,1968,Vol.20,MQ12,P.P.46-54 The Influence of Iron on the Microstructure and Properties of a Nickel-Base Cast Superalloy Ge Zhanying,Ye Ruizeng,Sun Jingui, Wang Hui,Yang Lianyin ABSTRACT The in finence of Iron (0~25%)on the microstructure and proper- ties of a cast Nickel-Base superalloy is examined The results of this study show,that the gamma prime fraction in alloy and gamma prime size decrease with the Iron addition in alloy.The morphology of gamma prime is changed from cube to spheroid and the amount of MC is inc- reased,but both amount of MaC.and M,B:are reduced as Iron cou- tent iucreases.The partition ratio of alloying elements between y-y is changed and average electron-vacancy number Nv is increased apparently by Iron addition in alloy,thus the precipitation of sigma phase is acc- elerated,The amount of harmful elements is increased with Iron addis- ion in alloy.Iron addition in alloy severely.decreases the stress rept- ure,but slightly iufluences the tensile strength of this cast nickelbase superalloy.Simultaneously,the ductility of alloy with high Iron con- tent is low. 23〔￾￾〕 ￾ ￾ ￾￾￾￾￾￾ 〔￾￾〕￾ ￾ 〔￾￾〕 ￾ ￾ ￾ ￾ ￾ ￾ ￾ ￾￾￾ ￾￾ 等 ， ￾￾ ￾ ￾￾‘奴￾ ， ￾￾ ￾一 ￾￾￾ ￾ ， ￾￾￾￾， ￾￾ ￾ ， ￾￾￾， ￾ ￾ ￾ ￾ ￾ ￾ ￾￾￾ ￾， ￾ ￾ ￾ ￾ ￾￾￾￾， ￾￾￾￾， ￾￾ ￾ ￾ ￾ ￾ ￾￾￾￾￾等 ， ￾ ￾ ￾ ￾ ￾￾￾￾， ￾￾￾￾， ￾ ￾￾， 地 ￾￾， ￾￾ ￾ ￾ ￾￾， ￾ ￾ ￾ ￾ ￾￾一￾￾ 地 ￾￾， ￾ ￾ ￾ ￾ ￾￾一￾￾ ￾￾￾ ￾￾ ￾￾￾ ￾￾ ￾ ￾ ￾ ￾ ￾￾￾ ￾ ￾ ￾ ￾￾￾ ￾ ￾￾￾ ￾ ￾￾￾ ￾ ￾ ￾￾ ￾￾ ￾ ￾ ￾ ￾￾￾ ￾￾ ￾ ￾￾￾ ￾ ￾ ￾￾ ￾￾￾￾￾￾一 ￾￾ ￾￾ ￾￾ ￾￾ ￾￾ ￾￾ ￾￾ ￾￾￾ ￾ ￾￾ ￾￾￾ ￾ ￾￾￾ ￾， ￾￾ ￾￾ ￾￾ ￾ ￾ ￾， ￾￾ ￾ ￾￾￾ ￾￾ ￾， ￾ ￾ ￾ ￾ ￾ ￾ ￾， ￾￾ ￾ ￾ ￾￾￾ ￾ ￾￾￾ ￾ ￾￾￾￾￾￾￾ ￾￾￾ ￾￾ ￾￾￾ ￾ ￾ ￾￾ ￾ ￾ ￾￾￾ ￾ ￾￾￾￾￾￾ ￾ ￾ ￾ ￾￾￾ ￾ ￾￾ ￾￾ ￾￾￾ ￾ ￾ ￾￾ ￾￾ ￾ ￾ ￾ ￾￾ ￾ ￾￾￾一 ￾￾￾￾ ￾ ￾ ￾ ￾ ￾ ￾￾ ￾￾￾￾￾￾一￾￾ ￾￾ ￾￾ ￾￾￾￾ ￾￾ ￾ ￾￾ ￾￾ ￾ ￾ ￾￾ ￾ ￾ ￾￾￾ ￾ ￾ ￾￾ ￾￾￾ ￾ ￾ ￾￾￾￾ ￾￾￾ ￾￾ ￾ ￾￾ ￾ ， ￾￾￾ ￾ ￾￾￾ ￾￾ ￾ ￾ ￾ ￾￾￾￾ ￾ ￾￾￾ ￾ ￾￾￾ ￾ ￾￾ ￾ ￾￾￾ ￾ ￾ ￾ ￾ ￾￾ ￾ ￾ ￾ ￾￾￾￾￾ ￾￾￾￾ ￾￾￾￾￾￾ ￾￾ ￾ ￾￾￾ ￾￾￾ ￾￾￾ ￾ ￾ ￾￾￾￾￾￾ ￾ ￾￾ ￾ ￾￾￾ ￾ ￾ ￾￾￾ ￾ ￾ ￾￾￾￾ ￾￾ ￾￾ ￾ ￾￾￾ ￾ ￾￾ ￾￾￾￾ ￾ ￾￾ ￾ ￾￾ ￾￾￾ ￾ ￾￾ ￾ ￾ ￾ ￾ ￾￾ ￾￾ ￾￾￾￾ ￾￾ ￾￾ ￾ ￾ ￾ ￾￾￾ ￾ ￾ ￾ ￾ ￾ ￾ ￾ ￾ ￾ ￾ ￾￾ ￾￾ ￾一 ￾￾￾￾￾￾ ， ￾￾ ￾ ￾￾ ￾￾ ￾￾ ￾ ￾ ￾ ￾ ￾ ￾ ￾ ￾ ￾￾￾ ￾ ￾ ￾ ￾ ￾ ￾￾ ￾ ￾￾ ￾￾￾￾￾￾￾ ￾ ￾ ￾￾ ￾ ￾ ￾ ￾ ￾￾ ￾￾￾ ￾ ￾￾ ￾￾￾￾￾￾ ￾ ￾ ￾￾￾ ￾￾ ￾￾￾￾￾￾ ￾ ￾￾ ￾￾￾ ￾ ￾￾ ￾￾￾ ￾￾￾ ￾ ￾￾￾￾￾￾ ￾￾ ￾￾ ￾￾ ￾￾ ￾ 丫一 丫， ￾￾ ￾￾￾￾￾￾￾ ￾ ￾ ￾ ￾ ￾ ￾￾￾￾￾ ￾￾￾￾ ￾￾ ￾ ￾一 ￾ ￾￾￾ ￾ ￾￾ ￾ ￾ ￾ ￾￾ ￾ 可￾ ￾￾ ￾￾ ￾￾￾￾ ￾￾ ￾ ￾￾￾￾￾￾ ￾ ￾￾￾ ￾￾ ￾￾￾ ￾ ￾ ￾￾￾￾￾￾ ￾ ￾￾ ￾￾￾ ￾， ￾￾￾ ￾ ￾￾￾ ￾￾￾￾￾￾￾￾￾ ￾￾￾ ￾ ￾ ￾ ￾￾￾￾ ￾ ￾￾￾ ￾￾ ￾￾ ￾￾￾￾ ￾￾￾￾￾ ￾￾￾ ￾ ￾￾￾ ￾ ￾ ￾ ￾ ￾ ￾ ￾ ￾ ￾￾￾￾ ￾￾ ￾￾￾￾ ￾ ￾ ￾ ￾￾ ￾￾ ￾￾ ￾ ￾￾￾ ￾￾￾ ￾ ￾￾￾ ￾￾ ￾ ￾ ￾ ￾￾￾￾一 ￾￾ ￾ ￾￾ ￾￾￾￾ ￾ ￾ ￾￾￾ ￾ ￾￾￾￾￾￾￾ ￾ ￾￾ ￾ ￾￾ ￾ ￾￾ ￾ ￾ ￾￾ ￾￾ · ￾￾￾￾￾ ￾ ￾￾ ￾ ￾￾￾ ￾￾￾￾￾ ￾ ￾￾￾￾一 ￾ ￾￾ ， ￾￾ ￾ ￾￾￾￾￾￾￾￾ ￾￾ ￾￾￾ ￾￾ ￾ ￾ ￾ ￾￾￾ ￾￾ ￾ ￾￾￾￾ ￾ ￾￾￾￾ ￾￾￾ ￾ ￾ ￾￾￾￾ ￾ ￾ ￾￾ ￾ ￾￾ ￾￾￾￾￾ ￾￾ ￾￾ ￾￾￾￾￾￾ ￾ ￾ ￾￾￾ ￾ ￾￾￾￾ ￾ ￾ ￾ ￾￾￾， ￾￾￾ ￾￾ ￾ ￾￾￾￾￾￾ ￾ ￾ ￾ ￾￾￾ ￾ ￾ ￾￾￾ ￾￾￾￾ ￾￾ ￾ ￾ ￾ ￾ ￾￾ ￾￾￾ ￾ ￾￾ ￾￾ ￾ ￾ 卜， ￾