期刊
PRODUCTION ENGINEERING ARCHIVES
卷 26, 期 1, 页码 19-24出版社
WALTER DE GRUYTER GMBH
DOI: 10.30657/pea.2020.26.05
关键词
aluminium alloy; ceramic filters; hardness; porosity
资金
- project VEGA [01/0398/19]
- project KEGA [049ZU-4/2017]
- project of Operational Programme Research and Innovation: Research and development activities of the University of Zilina [313011T426]
- European Regional Development Fund
The use of cast aluminium has still increased, so have the mechanical property requirements. By casting and also in other metallurgical processes, the inclusions enter to the molten aluminium alloy and it exhibits poor ductility or toughness. It can cause a variety of problems in the manufacture of aluminium alloy castings. Therefore, the purification of the molten aluminium alloy is one of the most important processes for improving the quality of Al-products. Filters have been used for many years in order to improve the quality of castings. The inclusions in molten secondary AlSi7Mg0.3 cast were removed using depth filtration by ceramic foam filters of 20 ppi porosity. Were used 4 types of ceramic filters in 2 thicknesses (15 and 22 mm); Brinell hardness and porosity were measured. Quality of microstructure (occurrence of oxidic particles and larger non-metallic inclusions) was observed. Experimental results show that the insertion of ceramic filters into the inlet system has contributed primarily to a decrease in porosity. On the microstructure, the inclusion of filters was not significantly reflected.
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