图为80mm 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,回火后组织基本全部为粒状贝氏体+少量M-A岛组织,晶粒更加粗大。
The picture shows the quenched + tempered structure of 80mm Q690NHH. It can be seen from 2000-10000 times scanning electron microscope observation that the structure after tempering is basically granular bainite + a small amount of M-A island structure, and the grains are more coarse.