金型用亜鉛合金の凝固組織に及ぼすアルミニウム及び銅量の影響

概要

論文の詳細を見る
The Zn-4Al-3Cu-0.05Mg alloy is commercially accepted as mold material for prototyping and small and mediun-lot production of up to ten thousand plastic parts. In order to investigate the possibility of controling the quaiity of the cast molds of this alloy, thermal analysis and microscopic observations were carried out. The microscopic observations of the quenched alloys and DTA curves for the powdered alloy demonstrated that the primary ε (Cu enriched phase) and α (Zn enriched phase) crystallized at the tempratures 668K and 664K, respectively, and than α and β (Al enriched phase) crystallized eutectically at 652K. The changes in the cooling curve and that in microstructure caused by the small deviations of aluminum and copper contents were found to be distinct enough to be applicable to the general observation of alloy compositions.
Japan Foundry Engineering Societyの論文