pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (31권3호 130-136)
Effects of GBF Treatment Conditions and Scrap Ratio on the Electric Conductivity of Commercial Pure Aluminum
공업용 순알루미늄의 전기전도도에 미치는 스크랩비율 및 GBF처리조건의 영향
Nam-Gyu Hwang, Young-Chan Kim*, Se-Won Choi*, Chang-Seok Kang*, Sung-Kil Hong
Chonnam National Univ., *Korea Institute of Industrial Technology
Effects of GBF (gas bubbling filtration) treatment conditions and scrap ratio on the electric conductivity of a commercial pure aluminum for diecasting were investigated using by specific gravity and electrical conductivity measurement system, hydrogen gas analyzer, XRD, and EDS. Electrical conductivities of specimen mixed Al scrap ratio until 60% from 0% were decreased with increasing the precipitates amount and size of AlFeSi ternary intermetallic compound on the grain boundary as well as amount of porosity in the grain. On the other hand, electrical conductivities was reincreased gradually in spite of scrap ratio increase from 80% to 100%. Size of AlFeSi compound formed on the grain boundary were coarsened with the increament of scrap ratios untill 80% and GBF treatment time simultaneously.
Diecasting, Electrical conductivity, GBF (gas bubbling filtration) treatment, Scrap ratio, AlFeSi intermetallic compound.
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