【摘要】 研究了微量元素Ｓｂ，Ｔｅ在ＺＡ２７合金中的作用。结果表明，单纯加入Ｓｂ或Ｔｅ时，均能提高ＺＡ２７合金的抗拉强度值，但塑性指标下降；Ｓｂ，Ｔｅ复合加入时，ＺＡ２７合金显示出了良好的综合性能指标，尤其是延伸率可大幅度提高，远远超过ＡＳＴＭ６６９－８２标准．Ｓｂ和Ｔｅ的作用主要是因为强成分过冷效应使得ＺＡ２７的凝固温度区间缩小，形成细小的花瓣状而不是树枝状初生晶，及减少或消除显微缩松，提高了ＺＡ２７合金的致密度．经Ｓｂ，Ｔｅ复合变质的ＺＡ２７合金，其抗拉强度σ＿ｂ最高可达４３８．１ＭＰａ，延伸率δ最高可达１７．３％．更多还原

【Abstract】 The role of trace elements Sb and Te in ZA27 has been studied.The resultsshown that adding Sb or Te in ZA27 indivdually can increase of the tatter tensile strengthbut decrease its elasticity. Haring been inoculanted with Sb and Te compoundly,ZA27 hasgood mechanical propertie.Especially the elongation can increase greaty,much over thestandard of ASTM 669-82.The role of Sb and Te can be taken as the effect of strong con-stitutional supercooling which decreases the solidification range. In this way,the form ofprimary grain is fine petal instead of dendric and the pores are decreased or eliminated. Thetensile strength of ZA27 inoculated by Sb and Te can reach 438.1 MPa and the elongationcan reach l7.3%.更多还原