FeS_2/Ar/空气气氛中镁合金熔炼试验研究  

Experimental Study on Melting Magnesium Alloy in FeS_2 /Ar/Air Atmosphere

作　　者：杨慧著[1] 陈晓[1] 

机构地区：[1]福州大学机械工程及自动化学院,福建福州350108

出　　处：《热加工工艺》2013年第5期37-40,43,共5页Hot Working Technology

基　　金：福建省自然科学基金资助项目(2009J01245)

摘　　要：在开放式熔炼炉中熔化了AZ91D镁合金,研究了不同粒度的FeS2和空气气氛中不同含量的Ar对AZ91D镁合金熔炼保护效果。采用SEM、EDS和XRD对保护膜形貌、成分和相组成进行了分析。结果表明,温度为730℃时,加入一定量硫铁矿的保护效果是好的。熔炼温度为730℃,保温30 min时,硫铁矿粒度越小,保护效果越好,但当粒度减小到一定程度时,保护效果反而减弱;随着空气含量的降低,保护效果加强,但当空气含量太少时,保护效果开始减弱。AZ91D magnesium alloy was melted in an opened furnace, and the protective effect of different grain sizes of FeS2 and different Ar contents in the atmosphere on melting AZ91D magnesium alloy was researched. The pattern of the protective film, components and phase structure were analyzed with SEM, EDS and XRD. The results show that the protective effects are good at 730℃ adding some FeS2. Melting at 730℃ for 30min, the smaller the grain size of FeS2, the better the protective effect,but when the grain size is too small, the protective effect become worse. And the protective effect is enhanced with the decrease of air content, but when the air content is too low, the protective effect become worse.

关 键 词：镁合金 熔炼 FeS2 表面膜 

分 类 号：TG243.1[金属学及工艺—铸造] TG292