机械振动对ZA27合金凝固组织和力学性能的影响  

Effect of Mechanical Vibration on Solidification Microstructure and Mechanical Properties of ZA27 Alloy

作　　者：张黎 陈乐平[1] 周全[1] 吴晗 ZHANG Li, CHEN Leping, ZHOU Quan, WU Han(School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, Chin)

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《铸造技术》2018年第4期774-777,共4页Foundry Technology

基　　金：江西省教育厅科技重点项目(GJJ1606796);江西省研究生创新专项资金项目(YC2017-S322)

摘　　要：研究了机械振动作用下振幅电压、振动频率对ZA27合金凝固组织和力学性能的影响。结果表明,通过控制机械振动参数,能够改善合金的凝固组织,提高其力学性能,其抗压强度最高可提高43.4%。在0~300 V内,随着振幅电压的提高,合金的凝固组织逐渐得到细化;在1~75 Hz内,随着振动频率的提高,合金的凝固组织先细化后粗化,转折点为50 Hz。机械振动作用下合金的抗压强度与凝固组织变化规律基本相同,但部分具有粗大凝固组织的合金,其抗压强度反而提高。The influences of amplitude voltage, vibration frequency and pouring temperature on solidification structure and mechanical properties of ZA27 alloy were studied under mechanical vibration. The results show that solidification structure and mechanical properties of the alloy can be improved, and the compressive strength of the alloy can be increased by up to 43.4%. When the amplitude voltage is at 0-300 V, with the increase of amplitude voltage, the solidified structure of the alloy is refined gradually. When the vibration frequency is at 1-75 Hz,with the increase of vibration frequency, the solidified structure of the alloy is refined at first and then coarsened, and the turn point is 50 Hz. The compressive strength of the alloy under mechanical vibration is basically the same as that of solidified structure, but the alloy with coarse solidified structure has higher compressive strength.

关 键 词：ZA27合金 机械振动 凝固组织 力学性能 

分 类 号：TG244[金属学及工艺—铸造]