(燕山大学 材料科学与工程学院， 秦皇岛 066004)
摘 要: 采用正交试验设计方法研究了B+Ti+Ce复合变质对ZA27合金组织与性能的影响。正交试验结果表明：复合变质时，B，Ti和Ce的加入量分别为0.006%，0.012%和0.06%时，变质效果最佳，可使合金中的α相由未变质的粗大树枝状变为细小花瓣状。变质后合金抗拉强度为560MPa，比未变质的提高19%；延伸率为14%，比未变质的提高2.5倍。方差分析表明：影响复合变质效果的因素由强到弱的顺序为B加入量、 Ti加入量和Ce加入量，其中B加入量影响显著，Ti加入量影响较小，Ce加入量是不显著因素。
关键字: B+Ti+Ce复合变质；ZA27合金；力学性能
modification on microstructures
and properties of ZA27 alloy
（School of Materials Science and Engineering，
Yanshan University, Qinhuangdao 066004，China）
Abstract:The effect of B+Ti+Ce compound modification on the microstructures and mechanical properties of ZA27 alloy was studied by the method of orthogonal test. The orthogonal test shows that the best modification result appears when the dosages of B, Ti and Ce are 0.006%, 0.012% and 0.06%, respectively. The microstructure of α-phase will change from bough-like shape to patty petal-like shape. The tensile strength can be raised by 19% to 560MPa and the elongation by 250% to 14%. Variance analysis shows: the amount of B has a remarkable effect; the amount of Ti has a less remarkable effect; while the amount of Ce has no effect.
Key words: B+Ti+Ce compound modification; ZA27 alloy; mechanical property
