| Project/Area Number |
07555494
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Tohoku University |
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Principal Investigator |
OHTANI Hiroshi Tohoku Univ., Cnt.Interdisciplinary Res.Ass.Prof., 学際科学研究センター, 助教授 (70176923)
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| Co-Investigator(Kenkyū-buntansha) |
AKAMATSU Satoshi Nippon Steels Senior Researcher, 光製鉄所, 主任研究員
SENUMA Takehide Nippon Steels Senior Researcher, 八幡技術研究部, 主任研究員
KAINUMA Ryusuke Tohoku Vniv., Fac.Eng.Ass.Prof., 工学部, 助教授 (20202004)
ISHIDA Kiyohito Tohoku Univ., Fac.Eng., Professor, 工学部, 教授 (20151368)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1996: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | trump element / scrap / thermodynamic database / phase diagram |
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| Research Abstract |
The residual Cu in steel made from ferrous scrap is well known to cause surface fissure during the hot roling process. When the concentration of Cu in the surface layr exceeds the solubility of Cu in solid Fe, nearly pure liquid Cu forms at the interface of steel and the oxides. The solubiliyt of Cu in solid Fe is one of the dominant factors of this phenomena. Therefore, the effect of allying elements on the solubility of Cu in solid Fe has been investigated by using solid-liquid diffusion couples. An addition of Co, Ni and Al results in an increase of the solubility of Cu, while that of V,Cr, Mn, Si and Sn decreases the solubility. Thermodynamic calculation of the solid/liquid phase equilibria in the Fe-Cu-X ternary system has been also performed, whire a set of thermodynamic parameters of solid and liquid phases has been evaluated. Furthermore, the equation that describes the change of the solubility of Cu in solid Fe with an addition of alloying elements has been derived by thermodynamic analysis of these experimental values
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