对于含有0.3%残余元素铜的中碳钢,在1100℃下氧化1800s和3600s,利用扫描电镜和能谱仪观察氧化层与钢基体界面处铜的富集析出情况。并分析S、Ti等元素含量对于残余元素铜在氧化层附近富集情况的影响。结果表明,钢中硫化锰夹杂物数量的增多有利于更多的铜在硫化锰上析出,从而有效减轻铜在钢氧化层的富集偏析以及浸润晶界现象。 For medium carbon steels with 0.3% residual copper, the samples were oxidized at 1100 ℃ for 1800s and 3600s, and the enrichment and precipitation of copper at the interface between the oxide layer and the steel substrate were observed by SEM and EDS. The influence of S, Ti and other elements on the enrichment of residual copper in the vicinity of the oxide layer was also analyzed. The results show that the increase of the amount of manganese sulfide inclusions in the steel is conducive to the precipitation of more copper on the manganese sulfide, thereby effectively reducing the enrichment segregation of copper in the steel oxide layer and infiltrating the grain boundary.