Construction of Thermodynamic Database for Trump Elements in Steels

钢中特朗普元素热力学数据库的构建

• 批准号: 07555494
• 负责人: OHTANI Hiroshi
• 金额: $ 1.6万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555494/
• 关键词: trump element; scrap; thermodynamic database; phase diagram

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

众所周知，由黑色废钢制成的钢中残留的铜会在热轧过程中引起表面裂纹。当表层中Cu的浓度超过Cu在固体Fe中的溶解度时，在钢和氧化物的界面处形成接近纯的液态Cu。 Cu 在固体 Fe 中的溶解度是这种现象的主导因素之一。因此，利用固液扩散偶研究了合金元素对Cu在固体Fe中溶解度的影响。添加Co、Ni和Al导致Cu的溶解度增加，而V、Cr、Mn、Si和Sn的添加则降低溶解度。还对Fe-Cu-X三元体系中的固/液相平衡进行了热力学计算，评估了一组固相和液相的热力学参数。此外，通过对这些实验值的热力学分析，导出了描述随着合金元素的添加，Cu 在固体 Fe 中的溶解度变化的方程

项目成果

H.Ohtani et al.: "Liquid/Solid Phase Equilibria in the Fe-Cu-X Ternary Systems" ISIJ International. Vol.37. 207-216 (1997)

H.Ohtani 等人：“Fe-Cu-X 三元系统中的液相/固相平衡”ISIJ International。

H. Ohtani et al.: "Liquid/Solid Phase Equilibria in the Fe-Cu-X Ternary Systems" ISIJ International. 37. 207-216 (1997)

H. Ohtani 等人：“Fe-Cu-X 三元系统中的液相/固相平衡”ISIJ International。

H. Ohtani, K. Ishida et al.: "Liquid/Solid Phase Equiliibria in the Fe-Cu-X Ternary Systems" ISIJ Intern.(発表予定).

H. Ohtani、K. Ishida 等人：“Fe-Cu-X 三元系统中的液相/固相平衡”ISIJ 实习生（待提交）。

H.Ohtani et al.: "Application of the CALPHAD Method to Material Design" Thermochimical Acta. (in press). (1997)

H.Ohtani 等人：“CALPHAD 方法在材料设计中的应用”Thermochimical Acta。

H. Ohtani et al.: "Application of the CALPHAD Method to Material Design" Thermochimica Acta. 印刷中. (1997)

H. Ohtani 等人：“CALPHAD 方法在材料设计中的应用”Thermochimica Acta（1997 年）。