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首页> 外文期刊>Journal of Materials Science >Coarsening behavior for M_(23)C_6 carbide in 12 %Cr-reduced activation ferrite/martensite steel: Experimental study combined with DICTRA simulation
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Coarsening behavior for M_(23)C_6 carbide in 12 %Cr-reduced activation ferrite/martensite steel: Experimental study combined with DICTRA simulation

机译：M_（23）C_6碳化物在12％Cr还原活化铁素体/马氏体钢中的粗化行为：与DICTRA模拟相结合的实验研究

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摘要

Based on the multi-component aspects of thermodynamics and diffusion, coarsening behavior of M_(23)C_6 (M = Cr, Fe, W) carbide at 650 C in 12 %Cr-reduced activation ferrite/martensite steel has been investigated experimentally using scanning transmission electron microscopy, combined with DICTRA simulation. Both the experimental measurements as well as the simulations indicate that the interfacial energy of M_(23)C 6 carbide in this steel at 650 C is probably 0.5 J m~(-2), and the coarsening rate of M_(23)C_6 carbide is very low. The influence of a change in Mn, V, and Ta content and temperature on the coarsening rate of M_(23)C_6 carbide is also investigated. The results show that the coarsening rate is increased by adding Mn and reduced by V and Ta addition, respectively, while an increase in the coarsening rate by an order of magnitude with increasing temperature per 50 C between 600 and 750 C. Precipitation of Laves (Fe2W) phase during aging has a negligible effect on the coarsening of M_(23)C_6.
机译：基于热力学和扩散的多方面因素，通过扫描实验研究了M_（23）C_6（M = Cr，Fe，W）碳化物在650 C下在12％Cr还原活化铁素体/马氏体钢中的粗化行为。透射电子显微镜，结合DICTRA模拟。实验和仿真结果均表明，该钢在650 C时M_（23）C 6碳化物的界面能约为0.5 J m〜（-2），M_（23）C_6碳化物的粗化速率非常低。还研究了Mn，V，Ta含量和温度的变化对M_（23）C_6碳化物粗化速率的影响。结果表明，通过添加Mn可以分别增加粗化速率，通过添加V和Ta可以降低粗化速率，而随着每50 C温度在600至750 C之间升高，粗化速率可以提高一个数量级。时效过程中的Fe2W）相对M_（23）C_6的粗化影响可忽略不计。

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