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.
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