Manufacturing of high strength magnesium alloys manufactured by rapid cooling process and their hot forging characteristics

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K06522
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Metal making/Resorce production engineering
• Research Institution: Tokyo Denki University
• Principal Investigator: WATARI HISAKI 東京電機大学, 理工学部, 教授 (90210971)
• Co-Investigator(Kenkyū-buntansha): 羽賀 俊雄 大阪工業大学, 工学部, 教授 (00212134) ; 鈴木 真由美 富山県立大学, 工学部, 教授 (20292245) ; 山崎 敬則 東京電機大学, 理工学部, 准教授 (80342476)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: Rapid cooling / Magneisum alloys / Twin roll casting / Hot forging / High strength materials / Weight reduction

Outline of Final Research Achievements

Twin roll casting experiments to manufacture thick forging materials were conducted using high aluminum content Mg alloys. Hot forgeability of the obtained material was examined. As a result, the following research results were obtained. Three types of high aluminum content Mg alloys, such as Mg-11 mass%Al-0.8 mass% Zn, Mg -12 mass% Al-0.8 mass% Zn, Mg-13 mass% Al-0.8 mass% Zn, were selected in roll casting experiments. By using the tandem twin roll method, it is possible to manufacture a forging thick sheet material of 24 mm at maximum. From a result of EDSD analysis of the cast strips, the crystal grain size was 70 μm near the roll surface and 30 μm at the center part of the strip, Mg17Al12and Al3Mg2 was discontinuously precipitated at the crystal grain boundaries.　A hot forging test using a servo press was performed and it was demonstrated that it is possible to manufacture a pin-shaped part (heat sink) with a height of 5 mm, at a 420 degrees centigrade.

Free Research Field

塑性加工