图为20mm Q690NHH 淬火+回火态组织,可以看出,通过2000-10000倍扫描电镜观察可以发现,回火后组织多为粒状贝氏体+M-A岛组织,M-A分布于贝氏体晶界或基体中。
The picture shows the 20mm Q690NHH quenched + tempered structure. It can be seen that through 2000-10000 times scanning electron microscope observation, it can be found that the structure after tempering is mostly granular bainite + MA island structure, and MA is distributed in the bainite grain boundary or In the matrix.