High-strength and precision die casting method by controlling solidification structure using in-mold cyclone.

• Project/Area Number: 26820333
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Metal making/Resorce production engineering
• Research Institution: Tohoku University
• Principal Investigator: Hirata Naoya 東北大学, 工学(系)研究科(研究院), 助教 (70507897)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 鋳造 / ダイカスト / 半凝固鋳造

Outline of Final Research Achievements

Die casting alloys could be kept as semi-solid state slurry in the shot sleeve by controlling a pouring temperature. In addition, very fine microstructure could be obtained by controlling the amount of initially solidified phase, which could not be obtained by conventional die casting method. Fluidity and dimensional accuracy by the proposed method were also higher than those by the conventional method.