AC4CH合金のセミソリッドダイカストにおける射出速度が初晶<i>α</i>-Al相粒子分布に与える影響

DOI Web Site 参考文献12件

書誌事項

タイトル別名
  • Effects of Injection Velocity on Distribution of Primary <i>α</i>-phase Particles in Semi-solid High Pressure Die Casting of JIS AC4CH Aluminum Alloy
  • AC4CH合金のセミソリッドダイカストにおける射出速度が初晶α-A1相粒子分布に与える影響
  • AC4CH ゴウキン ノ セミソリッドダイカスト ニ オケル シャシュツ ソクド ガ ハツショウa-A1ソウ リュウシ ブンプ ニ アタエル エイキョウ

この論文をさがす

抄録

<p>  We have already developed a new injection process with improved fluidity by applying shear stress to date. In this process, the product is made by the injection of solid-liquid coexistence slurry. Therefore, the microstructure of products made by this semi-solid injection process shows the dispersal of spherical primary α-phase particles in the matrix. The primary α-phase particles and matrix are thought to have been the solid phase and liquid phase respectively when the slurry was injected. These phases have different properties, hence the properties of semisolid products are thought to vary according to the distribution of primary α-phase particles. For this reason, semi-solid products have a specific microstructure.</p><p>  In this study, the distribution of primary α-phase particles was investigated in flow length test specimens made of AC4CH aluminum alloy formed in a spiral-shaped cavity at various injection speeds. It is found that the number of primary α-phase particles at the edge of the specimens is higher than other observation points. Also the primary α-phase particles were distributed homogeneously on the plane perpendicular to the flow direction at the edge of the specimens. At the observation points ranging from the gate to the middle of the flow length, the primary α-phase particles were found to concentrate on the center axis of the flow direction of specimens formed at high injection speeds. On the other hand, in the case of low injection speed specimens, the primary α-phase particles were also distributed homogeneously in these areas. The degree of concentration of the primary α-phase particles at the center axis is thought to be affected by the flow velocity in the cavity. These results suggest the possibility of controlling the distribution of the primary α-phase by changing flow velocity.</p>

収録刊行物

  • 鋳造工学

    鋳造工学 85 (10), 665-671, 2013

    公益社団法人 日本鋳造工学会

参考文献 (12)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ