超声熔体处理对Al-Zn-Ni-Mg合金组织的影响  

Effect of ultrasonic melt treatment on microstructure of Al-Zn-Ni-Mg alloy

作　　者：曾羽[1] 邵志文[1] 徐永东[1] 王军[1] 王荣[1] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103

出　　处：《兵器材料科学与工程》2015年第6期64-67,共4页Ordnance Material Science and Engineering

基　　金：浙江省公益技术研究工业项目(2014C31124);宁波市自然科学基金项目(201401A6105117)

摘　　要：为实现Al-Zn-Ni-Mg合金制备过程中的组织优化,对合金进行超声熔体处理,通过对合金显微组织的分析,研究了超声熔体处理对合金组织的作用规律和作用机制。结果表明:未经超声熔体处理时,合金组织中的α-Al相粗大且呈树枝状,α-Al相平均晶粒尺寸超过50μm;Al3Ni共晶相及晶界相T(Al,Zn,Mg,Cu)相非常粗大。经超声熔体处理后,α-Al相得到明显的细化、球化,平均晶粒尺寸在40μm左右;Al3Ni共晶相及晶界相T(Al,Zn,Mg,Cu)相明显细化。Al3Ni共晶相形貌由粗大鱼骨状转变为细小团聚网状;晶界相T(Al,Zn,Mg,Cu)相形貌由沿晶界连续分布的粗大块状转变为沿晶界非连续分布的细小块状。In order to implement the optimization of Al-Zn-Ni-Mg alloy structure,the melt of Al-Zn-Ni-Mg alloy was treated with power ultrasonic. The laws and mechanisms of ultrasonic melt treatment on alloy structure were investigated through the analysis of alloy microstructure. The results show that without ultrasonic treatment,α-Al grains are coarse and dendritic,and the average grain size of α-Al grains is more than 50 μm. T（Al,Zn,Mg,Cu）and Al3 Ni phases are coarse. After ultrasonic treatment,α-Al grains are obviously refined and spheroidized,and the average grain size of α-Al grains is about 40 μm. T（Al,Zn,Mg,Cu）and Al3 Ni phases are significantly refined,the morphology of Al3 Ni phases is transformed from coarse herringbone to fine agglomeration network,and the morphology of T（Al,Zn,Mg,Cu）phases is transformed from coarse block and continuously distributed on boundaries to fine block and uncontinuously distributed..

关 键 词：Al-Zn-Ni-Mg合金 超声熔体处理 显微组织分析 Al3Ni共晶相 

分 类 号：TG292[金属学及工艺—铸造]