考虑不规则夹杂物对针状铁素体形核的影响,建立了基底相、析出相均为正三棱锥形的形核数学模型。通过理论分析发现:可诱发铁素体形核的夹杂物不仅为球形,也可为不规则带有棱角的夹杂物;夹杂物与铁素体之间的润湿角越小,夹杂物越容易诱发针状铁素体形核;基底相侧面顶角ω在75°~120°时,不规则夹杂物易诱发针状铁素体形核。 Considering the influence of irregular inclusions on acicular ferrite nucleation, a nucleation mathematical model with a base of three-sided pyramids and a basement phase and a precipitated phase are established. The theoretical analysis shows that inclusions that induce ferrite nucleation are not only spherical but also irregular with angular inclusions. The smaller the wetting angle between inclusions and ferrite, the easier the inclusions are induced Acicular ferrite nucleation; base phase side angle apex angle of 75 ° ~ 120 °, irregular inclusions easily induced acicular ferrite nucleation.