| Project/Area Number |
59850029
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
機械工作
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| Research Institution | HIROSHIMA UNIVERSITY (1985-1986)
Kobe University (1984) |
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Principal Investigator |
OSAKADA Kozo Faculty of Engineering, Hiroshima University・Professor, 工学部, 教授 (50031109)
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| Co-Investigator(Kenkyū-buntansha) |
OKIMOTO Kunio Goverment Industrial Research Institute, Kyushu・Senior Researcher, 機械金属部, 主任研究員 (30268487)
久保 勝司 通産省工業技術院名古屋工業技術試験所, 機械部, 課長
松野 建一 通産省工業技術院機械技術研究所, 材料工学部, 部長
SEKIGUCHI Hideo Nara Technical College・Assistant Professor, 助教授 (80043462)
MORI Ken-ichiro Kyoto Institute of Technology・Research Assistant, 工芸学部, 助手 (80127167)
MATSUNO Ken-ichi Mechanical Engineering Laboratory・Head of Department
KUBO Katsushi Goverment Industrial Research Institute, Nagoya・Chief of Section
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| Project Period (FY) |
1984 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥5,400,000 (Direct Cost: ¥5,400,000)
Fiscal Year 1986: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1985: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1984: ¥3,900,000 (Direct Cost: ¥3,900,000)
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| Keywords | Ceramics / Flexible Forging / Rigid-Plastic Finite Element Method / Simulation; Titanium Alloy / Nickel Alloy / Measurement of Friction / 摩擦測定 / 潤滑剤 / シミュレーション / チタニウム合金 / 摩擦特性 |
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| Research Abstract |
This report describes a new forming method of heat resisting alloys in isothermal forging with ceramic dies.
To develop a non-glass type lubricant suitable for ceramic dies, compression tests of ring-shape specimens of titanium alloys are carried out on a newly constructed apparatus at temperatures around 900゜C.
From these results, it is found that a lubricant which consists of boric acid and boron nitride provides a very low friction for ceramic dies of <Al_2> <O_3> , SiC and <Si_3> <N_4> , when a ratio of boron nitride is in the range from 20 to 30%. Applying this lubricant with <Al_2> <O_3> dies, the lower friction than glass-type lubricant conventionally used in isothermal forging is obtained.
By comparing the coefficients of friction for all the ceramic dies, it is clarified that <Al_2> <O_3> shows the lowest friction among the rest of ceramics.
For confirming a principle of the new forming method, a mechanical press controlled by microcomputer is developed. Plasticine is formed to disk-shape product on the press. It is clarified that shape of product depends on forming conditions such as forming method, and it is necessary to determine shape of die teeth to finish surface of products smoothly. Deformation of plasticine is analyzed by using rigid-plastic finite element method and forging tests are carried out for various shapes of die teeth. The smooth surface is obtained by using dies with round corner.
Conclusively, the feasibility of applying flexible forging system with ceramic dies to forming heat resisting alloys is clarified.
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