机械振动对Al-Fe合金凝固组织的影响  

Effect of Mechanical Vibration on Solidification Structure of Al-5%Fe Alloy

作　　者：陈乐平[1] 李彩虹[1] 周全[1] 彭帅 

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：《热加工工艺》2015年第3期90-93,96,共5页Hot Working Technology

基　　金：航空科学基金资助项目(2012ZF56018;20125356009)

摘　　要：在Al-5%Fe合金凝固过程中施加机械振动,研究了机械振动参数（如振幅、振动频率）、模具预热温度及浇注温度对其凝固组织的影响。结果表明,通过控制机械振动参数和凝固条件可有效细化Al-5%Fe合金的凝固组织,A13Fe相由粗大的长针状转变为细针状或短杆状;随着振幅和振动频率的升高,合金的凝固组织逐渐细化,且振幅细化效果优于振动频率;在200～800℃范围内,凝固组织随模具预热温度的升高逐渐粗化;在800～890℃范围内,随浇注温度升高,A13Fe组织先细化后又粗化,830℃时细化效果最好。The effects of mechanical vibration parameters, such as amplitude, vibration frequency, preheating temperature of mould and pouring temperature on the solidification structure of A1-5%Fe alloy were investigated. The results show that solidification structures of A1-5%Fe alloy can be effectively refined by controlling mechanical vibration parameters and solidification conditions. A13Fe phase is transformed from long coarse strip to fine needle or short rod shape. The solidification structure of alloy refines with the increase of amplitude and vibration frequency, and the refinement effect of amplitude is better than that of vibration frequency. In the range of 200℃-800℃, the solidification structure is coarsened gradually with the increase of the mould temperature. In the range of 800-890℃, A 13Fe phase refines at first and then coarsens with the increase of pouring temperature. When the pouring temperature is 830℃, the refinement effect is the best.

关 键 词：AL-5%FE合金 机械振动 凝固组织 

分 类 号：TG292[金属学及工艺—铸造]