论文部分内容阅读
通过对高锰钢晶粒内部和晶界偏聚硬壳层区域的有限元应力模拟计算，获得了不同偏聚程度条件下的应力状况。计算结果表明，晶界应力集中程度随晶界Ｍｎ偏聚浓度和偏聚层厚度的上升而显著提高，由于晶界偏聚而导致的晶界区域硬壳层对高锰钢的断裂性能是非常有害的。从模拟计算这一角度证实了晶界应力集中是高锰钢产生脆断的主要原因，这与宏微观结构成分和力学性能试验所得到的结果吻合。
Through the finite element stress simulation of the segregation of the hard shell layer in the grain boundaries of high manganese steel, the stress conditions under different segregation degree were obtained. The calculated results show that the stress concentration in the grain boundary increases remarkably with the segregation of Mn concentration and the thickness of the segregation layer, and the fracture properties of the high manganese steel in the grain boundary region due to the segregation of the grain boundaries are very high Harmful. From the point of view of simulation calculation, it is confirmed that the stress concentration in the grain boundary is the main reason for the brittle fracture of high manganese steel, which agrees well with the results of the macro-micro-structure components and mechanical properties tests.