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首页> 外文期刊>Philosophical Magazine Letters >Predicting the cooperative effect of Mn-Si and Mn-Mo on the incomplete bainite formation in quaternary Fe-C alloys
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Predicting the cooperative effect of Mn-Si and Mn-Mo on the incomplete bainite formation in quaternary Fe-C alloys

机译：预测Mn-Si和Mn-Mo对季镍合金中不完全贝氏体形成的协同作用

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摘要

Predicting the effect of alloying elements on the degree of incomplete austenite to bainite transformation in low carbon steels is of great industrial importance. This study introduces an extended Gibbs energy balance model which makes use of an additive approach to calculate the coupled effect of Mn, Si and Mo on the fraction of bainitic ferrite after the incomplete transformation in multicomponent steels. The model predicts significant effects of Mn and Mo and the negligible effect of Si levels on the fraction of bainitic ferrite. This is attributed to the high value of dissipation of Gibbs energy caused by interfacial diffusion of Mn and Mo and low values caused by Si diffusion. The model predictions for quaternary Fe-C-Mn-Si system are comparable with the experimentally measured values of bainite fraction. For the Fe-C-Mn-Mo system, the agreement is less accurate and the accuracy decreases with increasing Mo content, which is attributed a substantial carbide formation but interaction effects between Mn and Mo or a temperature dependent binding energy cannot be ruled out.
机译：预测合金元素对低碳钢中贝氏体转化的不完全奥氏体程度的影响具有很大的工业重要性。本研究介绍了延伸的GIBBS能量平衡模型，它利用添加方法来计算Mn，Si和Mo在多组分钢的不完全转化后贝氏体铁氧体的偶数效应。该模型预测Mn和Mo的显着影响以及Si水平对贝氏体铁氧体的级分的可忽略效果。这归因于由Mn和Mo的界面扩散和由Si扩散引起的低值引起的Gibbs能量耗散的高值。季镍Fe-C-Mn-Si系统的模型预测与贝氏体馏分的实验测量值相当。对于Fe-C-Mn-Mo系统，该协议的准确性较低，并且由于Mo含量的增加而降低，其归因于大量碳化物形成，但不能排除Mn和Mo或温度依赖性结合能之间的相互作用效应。

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