材料内部孔隙性缺陷自修复过程

Self-recovering process of cavity-type inner fault in materials

为了更好地指导在大型锻件生产中修复孔隙性缺陷 ,文章采用大量的物理模拟实验研究了 2 0MnMo钢内部孔隙性缺陷在高温保温时自修复过程。根据自修复过程中的组织变化现象 ,解释了孔隙性缺陷自修复过程。研究得出再结晶是孔隙性缺陷孔隙消失的主要原因 。

In order to give theory direction to the recovering of cavity type fault in heaving forging, the self recovering process of cavity type inner fault in alloy steel 20MnMo was studied by a large number of experiments with modeling method. The process was explained by the transformation of structure during self recovering according to the phenomena appeared in the experiments. It was important to discover that recrystallization was the primary factor to eliminate the cavity of the fault.The results may be applied to the recovering of cavity type crack in heavy forging production and help improve the quality.