探讨了原始组织正常的热轧GCr15钢经球化退火后的组织特征及其评级问题.针对生产实际及检验中出现的问题,制定球化退火工艺,找出工艺与球化组织形态特征的对应关系,以便较正确地评定GCr15钢的球化退火组织级别. The microstructure and grading of the hot-rolled GCr15 steel after hot-rolling of GCr15 steel with normal primary structure were discussed. According to the actual production and the problems occurred during the test, the ball annealing process was developed to find out the correspondence between the process and the morphological characteristics of the spheroidizing structure Relationship in order to more accurately evaluate GCr15 steel ball annealing organization level.