Fabrication of Lotus Metals Consisting of Two Different Metals Using Continuous Casting Technique with Multiple Molds

采用多模具连续铸造技术制造由两种不同金属组成的莲花金属

• 批准号: 19760521
• 负责人: SUZUKI Shinsuke
• 金额: $ 1.89万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19760521/
• 关键词: 鋳造; 金属生産工学; 構造・機能材料; 材料加工・処理; 金属物性; 環境材料; ポーラス金属; 連続鋳造法; 水素ガス; アルミニウム合金; 溶融接合; 凝固; デンドライト; 共晶合金

Lotus-type porous metals with pores elongated in one direction are expected to be applied to light-weight structural materials of transport machineries. In this study, lotus aluminum alloys were fabricated using Al-Si, Al-Cu, Al-Si-Mg and so on by unidirectional solidification, and the morphologies of pores were investigated. The pores generated and grew in the eutectic region among several dendrite arms. The shape of pores reflected the morphologies of the surrounding dendrite arms. The size of pores was in the same order as the dendrite arm spacing. Furthermore, lotus-type porous magnesium ingots were fabricated in pressurized hydrogen atmosphere through a mold casting technique. The mold consisted of two cooling blocks placed at the bottom and one lateral side. It was found that the pores started to grow upwards and horizontally and the both directional pores merged and then shifted to the direction. Such anisotropic growth directions of pores were in good agreement with the directions of the temperature gradient predicted by two-dimensional finite differential analysis. The mechanisms were investigated for the interruption of pore growth, the collision of two pores grew from two solid-liquid interfaces, the formation of curved pores, and the pore coarsening at the bonding plane of two solid-liquid interfaces.

具有单向延伸孔隙的藕状多孔金属有望应用于运输机械的轻质结构材料。本研究采用Al-Si、Al-Cu、Al-Si-Mg等材料，通过定向凝固制备了莲花铝合金，并对气孔形貌进行了研究。气孔在枝晶间的共晶区生成和长大。孔隙的形状反映了周围枝晶臂的形态。孔隙的大小与枝晶臂间距的大小相同。在此基础上，采用压铸法在氢气气氛中制备了多孔镁莲花锭。模具由放置在底部和一侧的两个冷却块组成。结果表明，孔隙开始向上和水平生长，两个方向的孔隙合并，然后转向该方向。孔的各向异性生长方向与二维有限差分分析预测的温度梯度方向吻合得很好。研究了孔生长的中断、两个固-液界面上生长的孔的碰撞、弯曲孔的形成以及两个固-液界面结合面上的孔粗化等机理。

项目成果

一方向凝固したAl-Mg-Si合金の気孔形態に及ぼすミクロ組織の影響

显微组织对定向凝固Al-Mg-Si合金孔隙形貌的影响

• 发表时间: 2010
• 期刊: 軽金属 59
• 作者: 金泰範;鈴木進補;中嶋英雄
• 通讯作者: 中嶋英雄

Fabrication of Lotus-type Porous Al-Ti Alloys using the Continuous Casting Technique

连铸技术制备莲花型多孔铝钛合金

• 期刊: Materials Science Forum (掲載決定)
• 作者: T.B. Kim;S. Suzuki;H. Nakajima
• 通讯作者: H. Nakajima

ロータス型ポーラスマグネシウム鋳塊の気孔成長方向の制御

莲花型多孔镁锭孔隙生长方向的控制

• 发表时间: 2009
• 作者: 杉原孝平;鈴木進補;中嶋英雄
• 通讯作者: 中嶋英雄

ロータス型ポーラス金属の気孔成長方向と冷却方法の関係

莲花型多孔金属孔隙生长方向与冷却方式的关系

• 发表时间: 2009
• 作者: 杉原孝平;鈴木進補;中嶋英雄
• 通讯作者: 中嶋英雄

ロータス型ポーラスAl-Cu合金の気孔形成に及ぼす凝固組織の影響

凝固组织对莲花型多孔Al-Cu合金气孔形成的影响

• 发表时间: 2009
• 作者: 鈴木進補;金泰範;中嶋英雄
• 通讯作者: 中嶋英雄