采用金相、电子探针方法分析三种含磷量的Fe-P合金(0.007,0.06和0.09wt-％P)经70％冷变形后,在200—700℃真空退火过程中磷的偏聚行为及其对组织结构的影响,结果表明,磷在回复退火过程中偏聚于位错线处,形成富磷的位错密集区和贫磷区,以及明显的类亚晶界,在再结晶过程中,晶核优先萌生于位错密集的残余应变量较大的区域,即磷偏聚量较大的区域,再结晶后磷偏聚于晶界,且使合金晶粒细化。
The segregation behaviour of P and its effect on structure of 70%-re-duction cold rolled Fe-P alloys containing different contents of P, e. g., 0.007, 0.06and 0.09%P, during annealing at 200--700℃ under vacuum have been studied bymeans of metlallography and EPMA. The P was found to segregate preferentiallyalong dislocation line during recovery annealing. The P-riched dislocation densingregion, the P-depleted region and the sub-grain-like boundary are thus formed. Thenuclei grow preferentially during recrystallization in such region that the P segre-gation is more evident and the residual strain by dislocation densing increases tolarge extent. After recrystallized, the P segregates along grain boundaries and makesfine grain of the alloys.
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