KBF<sub>4</sub>去除Al-7Si合金中Fe相杂质及对组织的影响

庞士鹏; 周峥嵘; 洪元俭; 周成双; 张林

doi:10.15980/j.tzzz.2019.03.027

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KBF₄去除Al-7Si合金中Fe相杂质及对组织的影响
Effects of KBF₄ on Elimination of Iron Phase Impurities and Microstructure in Al-7Si Alloy
2019年39卷第3期页码：339-343
纸质出版日期： 2019 ，
DOI： 10.15980/j.tzzz.2019.03.027

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[1]庞士鹏,周峥嵘,洪元俭,周成双,张林.KBF_4去除Al-7Si合金中Fe相杂质及对组织的影响[J].特种铸造及有色合金,2019,39(03):339-343.

Pang Shipeng, Zhou Zhengrong, Hong Yuanjian, et al. Effects of KBF₄ on Elimination of Iron Phase Impurities and Microstructure in Al-7Si Alloy[J]. Special Casting & Nonferrous Alloys, 2019,39(3):339-343.
[1]庞士鹏,周峥嵘,洪元俭,周成双,张林.KBF_4去除Al-7Si合金中Fe相杂质及对组织的影响[J].特种铸造及有色合金,2019,39(03):339-343. DOI： 10.15980/j.tzzz.2019.03.027.

Pang Shipeng, Zhou Zhengrong, Hong Yuanjian, et al. Effects of KBF₄ on Elimination of Iron Phase Impurities and Microstructure in Al-7Si Alloy[J]. Special Casting & Nonferrous Alloys, 2019,39(3):339-343. DOI： 10.15980/j.tzzz.2019.03.027.

摘要

通过热力学计算和分析添加KBF

去除Al-Si合金中杂质Fe相的可行性

并利用金相显微镜、扫描电镜、能谱仪和XRD等

研究了Al-7Si合金中添加KBF

后合金组织形貌和析出的沉淀相。结果表明

熔炼温度为1 013K

加入精炼剂除气除渣

再加入1.6%的KBF

保温30min后静置沉淀

Fe含量从1%下降到0.68%。XRD分析经过沉淀后的试样底部组织

发现生成了Fe

B与AlB

。KBF

对铝合金除Fe的同时又能起到细化铝合金晶粒尺寸的作用。

Abstract

Feasibility of added KBF

to remove iron phase impurities in Al-Si alloy was carried out by thermodynamic calculation and analysis

and change of microstructure and precipitated phase in Al-Si alloy with KBF

addition were investigated by means of metalloscope

scanning electron microscope

energy dispersive spectrometer and X-ray diffraction.The results reveal that Fe content in Al-7Si alloy is decreased from 1% to 0.68% with melting at 1 013 K

degassing and slag removal by adding refining agent as well as adding 1.6% KBF

for 30 min.The Fe

B and AlB

are generated at bottom of the samples after precipitation by XRD analysis.KBF

can remove the iron from the aluminum alloy and refine the grain size in the aluminum alloy.