| Project/Area Number |
02555141
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
金属加工(含鋳造)
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| Research Institution | UNIVERSITY OF TOKYO Grant-in-Aid for Developmental Scientific Research |
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Principal Investigator |
KIKUCHI Manabu INSTITUTE OF INDUSTRIAL SCIENCE, UNIVERSITY OF TOKYO PROFESSOR, 生産技術研究所, 教授 (70013117)
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| Co-Investigator(Kenkyū-buntansha) |
SHINTANI Ken INSTITUTE OF INDUSTRIAL SCIENCE, UNIVERSITY OF TOKYO ASSISTANT RESEARCHER, 生産技術研究所, 助手 (60092243)
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| Project Period (FY) |
1990 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥13,000,000 (Direct Cost: ¥13,000,000)
Fiscal Year 1992: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1991: ¥4,700,000 (Direct Cost: ¥4,700,000)
Fiscal Year 1990: ¥6,900,000 (Direct Cost: ¥6,900,000)
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| Keywords | Mashy Metal / Semi-Solid Metal / Mashy-State Rolling / Mashy-State Injection Moulding / Solid Fraction / Shear-Cooling Roll / Mashy-State Extrusion / Mashy-State Forging / 二次加工 / 半凝固金属 / 固相成分 / 液相成分 / せん断冷却ロ-ル法 / 結晶粒径 / 有限要素法 / 固相率計測システム |
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| Research Abstract |
The results are summarized as follows.
1. A mathematical model which represents microscopic flow and deformation features of solid and liquid components included in those metals were formulated. This model can be used effectively for predicting flow stresses of mashy /semi- solid metals especially when they have high solid fraction.
2. A new method for detecting the solid fraction of mashy/semi- solid metal was developed. The method was applied to various metals and relationships between solid fraction and temperature for many kind of metals were obtained. It has become evident that the developed method is very effective and convenient for detecting the solid fraction of metals being subjected to mashy/semi-solid processing.
3. A new-process for manufacturing semi-solid metals was developed. It was named as SCR (Shear-Cooling Roll)-process. A proto-type machine was built and the characterization of the process was performed. Through a series of tests carried out by employing molten aluminum alloys and ferrous alloys as raw materials, SCR-process has been demonstrated to be very effective for making molten metals into semi-solid metals with various levels of soled fraction.
4. Mechanical properties and formability of semi-solid metals manufactured by SCR process have been widely investigated.
5. Mashy-state forging of cast irons was performed and internal structures of products were investigated. As the result, this technology was found effective for manufacturing high quality cast iron products.
6. Manufacturing processes for various car parts and electric appliance parts have been investigated by using mashy/semi- solid metal forming technology.
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