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对钢液凝固温度下钛的化合物、Al2O3、MnS等基底与形核相铜元素的二维点阵错配度进行了计算,并对其成为铜元素非均质形核核心的有效性进行了分析。结果表明:基底与形核相的错配度δ越小,越有利于非均质形核。Ti2O3、MnS和Al2O3与铜元素的错配度较小,具有良好的匹配关系,可以作为铜元素形核的质点并促进其异质形核。Ti2O3和MnS是钢中残余铜元素非均质形核的最有效核心;Al2O3为中等有效核心;TiC、TiN为无效核心。
The misclassification degree of two-dimensional lattice of titanium compounds, Al2O3, MnS and other base and nucleation phase copper elements at the solidification temperature of molten steel was calculated and its effectiveness as a copper element heterogeneous nucleation center analysis. The results show that the smaller the mismatch δ between the substrate and the nucleation phase, the more favorable to the heterogeneous nucleation. The mismatch of Ti2O3, MnS and Al2O3 with copper is small and has a good matching relationship, which can be used as the particle of copper element nucleation and promote its heterogeneous nucleation. Ti2O3 and MnS are the most effective cores for the heterogeneous nucleation of residual copper in steel; Al2O3 is the medium effective core; TiC and TiN are ineffective cores.