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;
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 result show that the microstructure formed after thermal cycle was mainly lath bainite and granular bainite in CGHAZ .
结果表明:在不同的焊接热循环条件下,焊接粗晶区组织主要是板条贝氏体和粒状贝氏体。