摘要
研究了低温室效应的四氟丙烯-N_2气氛对纯镁的保护效果。结果表明:以氮气为载气时,四氟丙烯能很好地保护镁熔体,在不同熔炼温度下,其所需的最低保护气体浓度为0.05%~0.48%。气体保护效果随着保护气体浓度的增加、熔炼温度的降低而变好。采用SEM、EDS和XRD等分析手段对表面氧化膜进行检测分析可知,氧化膜呈波浪起伏状,没有微裂纹和孔洞,由Mg、F和O三种元素组成,其主要物相为MgF_2和MgO。
The protective effect oftetrafluoropropene/nitrogen atmosphere on the pure magnesium was studied. The results show that tetrafluoropropene can protect magnesium melt with nitrogen as the carrier gas, and the minimum protective gas concentration is 0.05%-0.48% at different melting temperatures. The protective effect is improved as the protective gas concentration increases and the melting temperature decreases. The results of SEM, EDS and XRD show that the oxide film is undulating and has no microcracks and holes; it is mainly composed ofMg, F and O, and the main phases are MgF2 and MgO.
出处
《铸造》
CAS
CSCD
北大核心
2017年第8期865-867,875,共4页
Foundry
基金
广西自然科学基金资助项目(2014GXNSFAA118345)
广西高校科学技术研究项目(2013ZD068)
关键词
镁合金
熔炼保护
氧化膜
四氟丙烯
magnesium alloys
melting protection
oxide film
tetrafluoropropene
