| Project/Area Number |
17360352
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Toyohashi University of Technology |
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Principal Investigator |
MORI Ken-ichiro Toyohashi University of Technology, Faculty of Engineering, Professor, 工学部, 教授 (80127167)
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| Co-Investigator(Kenkyū-buntansha) |
MAKI Seijiro Mie University, Faculty of Engineering, Professor, 工学部, 教授 (20124315)
TAKUDA Hirohiko Kyoto University, Graduate Schools of Energy Science, Professor, エネルギー科学研究科, 教授 (20135528)
OTSU Masaaki Kumamoto University, Faculty of Engineering, Lecturer, 工学部, 講師 (20304032)
ABE Yohei Toyohashi University of Technology, Faculty of Engineering, Research Associate, 工学部, 助手 (60402658)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥13,300,000 (Direct Cost: ¥13,300,000)
Fiscal Year 2006: ¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2005: ¥10,400,000 (Direct Cost: ¥10,400,000)
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| Keywords | ultra high tensile strength steel sheet / resistance heating / heating of sheet set into die / warm and hot forming / press forming / springback / die quenching / warm and hot shearing |
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| Research Abstract |
A warm and hot press forming process of ultra high tensile strength steel sheets using resistance heating was developed to improve springback and formability. In this process, the decrease in temperature of the sheet before the forming is prevented by directly heating the sheets set into the dies by means of the electrical resistance. Since the heating time up to 800 ℃ is only 2 seconds, the resistance heating is rapid enough to synchronize with a press. The reduction of springback in warm bending and the quenching in hot press forming were examined. The oxidation in hot stamping was prevented by coating sheets with an oxidation preventive oil. In addition, a warm and hot shearing process using the resistance heating was developed to reduce the sharing load for the ultra high tensile strength steel sheets.
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