(燕山大學(xué) 材料科學(xué)與工程學(xué)院， 秦皇島 066004)
摘 要: 采用正交試驗(yàn)設(shè)計(jì)方法研究了B+Ti+Ce復(fù)合變質(zhì)對ZA27合金組織與性能的影響。正交試驗(yàn)結(jié)果表明：復(fù)合變質(zhì)時(shí)，B，Ti和Ce的加入量分別為0.006%，0.012%和0.06%時(shí)，變質(zhì)效果最佳，可使合金中的α相由未變質(zhì)的粗大樹枝狀變?yōu)榧?xì)小花瓣?duì)睢Ｗ冑|(zhì)后合金抗拉強(qiáng)度為560MPa，比未變質(zhì)的提高19%；延伸率為14%，比未變質(zhì)的提高2.5倍。方差分析表明：影響復(fù)合變質(zhì)效果的因素由強(qiáng)到弱的順序?yàn)锽加入量、 Ti加入量和Ce加入量，其中B加入量影響顯著，Ti加入量影響較小，Ce加入量是不顯著因素。
關(guān)鍵字: B+Ti+Ce復(fù)合變質(zhì)；ZA27合金；力學(xué)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
