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在钒微合金化技术发展的许多年里,发表过数个V-N强化预测模型并得到应用。文章对原先的一个得到验证的强度模型的基础和来源进行了综述和分析,认为决定此模型预测准确性的本质是设想实际可能形成V-N析出物的有效氮含量。讨论各种情况,即由于其它合金元素,特别是Ti,Nb和Al的存在,有效氮含量将被大大改变。在评价和预测多边形铁素体中VN析出物的强化作用时,其中Al含量的作用(在加工前)往往被忽视。对可能的Al和N的相互作用及其对有效氮的影响进行了综述,同时对技术条件要求的含铝量带来的非预期作用进行了分析。
In the many years of vanadium microalloying technology, several V-N enhanced prediction models have been published and applied. The article summarizes and analyzes the basis and source of a previously validated strength model and argues that the essence of determining the accuracy of this model prediction is the assumption of the effective nitrogen content that would actually form V-N precipitates. Various situations are discussed, namely that due to the presence of other alloying elements, especially Ti, Nb and Al, the effective nitrogen content will be greatly changed. In assessing and predicting the strengthening effect of VN precipitates in polygonal ferrite, the effect of Al content (prior to processing) is often overlooked. The possible interactions between Al and N as well as their effects on available nitrogen were reviewed, together with an analysis of the unexpected effects of the required aluminum content of the technical conditions.