It is proved that the so-called granular bainite microstructure is nothing else but the structural characteristic at a certain stage of this evolution.
论证了所谓粒状贝氏体组织实际上是这种演化过程的阶段性组织特征。
Moreover, the microstructure of X100 pipeline steel mainly consists of massive granular bainite, and some fine and dispersive M/A islands with a few lath bainite in the matrix also.
X100管线钢的显微组织以粒状贝氏体为主，同时弥散分布着大量细小的M/A岛和少量的板条贝氏体；
The microstructure of the steel transforms from ferrite plus granular bainite, lath bainite plus lath martensite and then to lath martensite successively with the increasing of cooling rate;
随着冷却速率的增加，实验钢的显微组织由铁素体+粒状贝氏体逐步转变为板条贝氏体+板条马氏体及板条马氏体组织；
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