母材两端相同位置组织碳化物分布差异不大，共晶碳化物条带均存在一定程度的偏聚，按GB/T 14979-94标准，共晶碳化物不均匀度可评级为2级，最大碳化物颗粒尺寸在33~38μm之间。

There is little difference in the distribution of carbide in the same position at both ends of the base metal, and there is a certain degree of segregation in the eutectic carbide bands. According to the GB/T 14979-94 standard, the non-uniformity of eutectic carbide can be rated as Grade 2, and the maximum carbide particle size is 33~38 μm.