| Project/Area Number |
14550131
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
設計工学・機械要素・トライボロジー
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| Research Institution | Kyushu Kyoritsu University |
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Principal Investigator |
YAMAMOTO Hiroyasu YAMAMOTO,Hiroyasu, 工学部・機械工学科, 教授 (10320128)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2003: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 2002: ¥3,000,000 (Direct Cost: ¥3,000,000)
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| Keywords | Cold Rolling / Stainless Steel / Surface Characteristics / Gloss / Roughness / Flatness / Friction Coefficient / Mirror Surface Technology / 接触率 / 表面粗さ / 弾塑性構成式 / 異方性 / 表層ナノ変形機構 |
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| Research Abstract |
1)In order to produce the super-bright stainless steel (surface gloss Gs[20℃] 950〜960, surface roughness: 0.05〜0.03μ m Ra), the new method of cold rolling has been found by the use of three roll polishing methods and various roll surface roughnesses as the technology of mirror surface creating in cold rolling of stainless steel sheets. Hereafter, the experimental analyses are required to determine the optimum conditions of cold rolling which give the highest super-bright gloss on the rolled surface of stainless steel sheet.
2)The factors controlling the nano deformation in the subsurface layer of cold rolled stainless steel sheet have been shown in the range of more than about 0.07 μ m Ra in roughness. Hereafter, it is necessary to clarify the factors affecting the nano deformation in the subsurface layer of cold rolled stainless steel sheet and the highest super-bright gloss within less than about 0.07 μ m Ra in roughness.
3)The use of the simplified tensor method has derived the von Mises type constitutive equation for the anisotropic materials. This constitutive equation has been verified by the comparison of the experimental results with the numerical simulated ones for the uniaxial tensile tests of steel sheets. Hereafter, it is necessary to analyze the deformation in the subsurface layer of cold rolled sheet numerically by applying this constitutive equation to the numerical model for the stress and strain analyses of material in cold rolling.
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