对两种耐火钢在室温和600℃进行拉伸力学实验,一种不含钒元素,一种钒元素含量为0.11at％,并用透射电镜(TEM)和原子探针层析技术(APT)观察这两种耐火钢的显微组织和分析合金元素的三维空间分布.结果表明,含钒元素实验钢中为(Nb,v)C碳化物,不含钒元素实验钢中为NbC碳化物,且含钒元素实验钢中碳化物数量远远高于不含钒元素实验钢,碳化物尺寸也稍大于不含钒元素实验钢.这表明耐火钢中适当含量的钒元素可以促进碳化物的弥散析出,增强析出强化作用,提高耐火钢室温和在600℃的力学性能.
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