超声功率对金属型铸造ZL114A合金致密度的影响  

Effects of Ultrasonic Power on Relative Density of Metal Mold Casting ZL114A Alloy

作　　者：沈加利 芦刚[1] 严青松[1] 李成[1] 杨普超 

机构地区：[1]南昌航空大学航空制造工程学院

出　　处：《特种铸造及有色合金》2015年第2期212-214,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51261025);材料成形与模具技术国家重点实验室开放基金资助项目(P2014-009)

摘　　要：在ZL114A熔体浇注过程中施加超声振动,研究超声波功率对合金致密度的影响。结果表明,超声波功率大小对ZL114A合金的组织细化和致密度提高效果明显。随着超声功率增加,试样的致密度提高,当超声施振功率提高到600 W时,合金的致密度达到峰值0.9986,此后随着功率增大,合金致密度有下降的趋势。通过金相组织观察分析,发现超声波的空化作用及声流作用可以细化晶粒、减少缩孔、缩松,从而提高凝固组织致密度。Effects of ultrasonic power on relative density of the 4A alloy were analyzed by applying ultrasonic vibration in the process of ZL114A melt. The results indicate that the ultrasonic treatment plays the remarkable role in refinement of microstructure and increase of relative density of the ZL114A alloy. The relative density is increased to 0. 998 6 with the increase of ultrasonic power to 600 W. How- ever, with further increases of the ultrasonic power, relative density of the ZL114A alloy is decreased gradually. The microstructure observation reveal sound power can refine grain size and reduce the microstructure of the alloy. s that cavitation and acoustic streaming porosity shrinkage to improve the soun effect of uhra- d solidification

关 键 词：超声波 ZL114A合金 致密度 凝固组织 

分 类 号：TG292[金属学及工艺—铸造] TG146.21[一般工业技术—材料科学与工程]