采用爆炸焊接的方法制备复合板后,复合板的低温冲击性能发生剧烈下降。针对这一现象,采用金相检验、扫描电镜和透射电镜分析法,对爆炸复合前后材料的微观组织进行了对比。结果表明,爆炸焊接后复合板晶粒内部产生了大量的位错团,使材料晶粒内部位错密度升高,从而导致材料的低温冲击性能下降。 After the explosive welding method is used to prepare the composite board, the low temperature impact performance of the composite board drastically declines. In response to this phenomenon, the metallographic examination, scanning electron microscopy and transmission electron microscopy analysis of the material before and after the explosion composite microstructure were compared. The results show that a large number of dislocation clusters are produced in the interior of the composite plate after explosive welding, which leads to the increase of the dislocation density inside the grains, which leads to the decrease of the low temperature impact properties.