【作者】 潘宁； 宋波； 翟启杰； 文彬；

【Author】 Pan Ning~1,Song Bo~1,Zhai Qijie~2,Wen Bin~1(1.School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.School of Materials Science and Engineering,Shanghai University, Shanghai 200072,China)

【机构】 北京科技大学冶金与生态工程学院； 上海大学材料科学与工程学院；

【摘要】 对钢液凝固温度下各种化合物基底与钢液凝固形核相(δ-Fe和γ-Fe)的二维点阵错配度进行了计算,并对点阵错配度与钢液非均质形核触媒效用的关系进行了分析和讨论。结果表明:基底与形核相的错配度δ越小,非均质形核效用越好。对各种化合物基底与钢液凝固形核相(δ-Fe和γ-Fe)的价电子结构进行了计算,基于静电作用理论和经验电子理论提出了基底和形核相之间的特征参量△ρ,并对Δρ与钢液非均质形核触媒效用的关系进行了分析和讨论。结果表明:基底和形核相之间的特征参量△ρ越大,非均质形核效用越好。更多还原

【Abstract】 Planar disregistries between carbides,nitrides,oxides, sulfides substrates and nucleated phases of liquid steel solidification are calculated.The relation between lattice disregistry and the heterogeneous nucleation catalysis of liquid steel is analyzed. The results show that the smaller the lattice disregistry is,the more effective the substrate is for promoting nucleation.Valence electron structures of carbides,nitrides,oxides,sulfides substrates and nucleated phases of liquid steel soUdification are calculated. Parameter Ap is proposed on the basis of Tiller’s electrostatic effect theory and Yu’s empirical electron theory.The relation between parameter Ap and the heterogeneous nucleation catalysis of liquid steel is analyzed.The results show that the smaller the parameter Ap is,the more effective the substrate is for promoting nucleation.更多还原