机械振动对AZ91D-3Ca镁合金凝固组织的影响  

Influence of Mechanical Vibration on Solidification Structures of Ignition-Proof Magnesium Alloy AZ91D-3Ca

作　　者：付浩[1] 周全[1] 谭水淋[1] 

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》2013年第6期565-569,共5页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51261026);江西省科技支撑计划资助项目(2010EHB01800)

摘　　要：以振幅、频率、浇注温度和铸型预热温度为研究因素,对AZ91D-3Ca阻燃镁合金施加机械振动进行了研究。研究表明,通过控制机械振动参数与凝固条件可以细化AZ91D-3Ca阻燃镁合金的凝固组织;当振幅在0～1.7mm范围内,随着振幅的增大,合金的初生晶粒逐渐细化。当频率为1Hz时,合金凝固组织已经出现细化;在50～100Hz范围内,振动频率的增加对凝固组织细化效果的影响不明显。振动条件下,当浇注温度在610～700℃范围内和铸型预热温度在室温～600℃范围内,随着浇注温度或铸型预热温度的增加,合金初生晶粒逐渐粗化。Effects of mechanical vibration parameters, such as amplitude, frequency, pouring temperature and preheating temperature of mold, on solidification structure of ignition-proof magnesium alloy AZglD3Ca were investigated. The results show that solidification structures of ignition-proof magnesium alloy AZ91D-3Ca can be refined by controlling mechanical vibration parameters and solidification conditions. Primary grain in the alloy is refined gradually with the increase of amplitude within 0- 1.7 mm. When frequency is 1Hz, refinement effect of primary grain appears. With frequency in range of 50-100 Hz, change of microstructure refinement can be ignored. With the increase of pouring temperature （610 -700 ℃）or preheating temperature of the mold （room temperature to 600℃）,primary grain of the alloy is coarsened gradually by mechanical vibration.

关 键 词：阻燃镁合金 机械振动 凝固组织 

分 类 号：TG244.3[金属学及工艺—铸造]