Via the SEM,EDS,ICP-OES and other methods,the causes and countermeasures for peeling defects of Cu-Fe alloy strips were studied.The results show that the distribution of peeling defects is scat-tered or in patches,and the peeling defects are irregular with the obvious signs of indentation at the peeling site.The higher the Fe content,the more severe the peeling defects.Integrating the SEM with EDS results of the peeling defects and Cu matrix,it can be concluded that the reason of peeling is the presence of a large amount of O element at the peeling defects.The solid solubility of oxygen in copper is relatively low,which is mainly dissolved in copper and its alloy in the form of Cu2O.During solidification,Cu2O brittle phase is formed of oxygen and copper,and Cu-Cu2 O eutectic structure with a low melting point is distribu-ted around the grain boundary.In the process of hot and cold rolling,the Cu-Cu2O eutectic structure will be detached from the copper matrix to form the peeling defects on the strip surface.In order to improve the peeling defects of Cu-Fe strip,it is necessary to control the content of O content in the copper liquid.In daily work,it is necessary to protect the melt,such as covering the melting furnace and crystallizer with multiple capping agent,combined with blowing a certain amount of argon gas into the melting furnace for gas protection.It could effectively avoid the appearance of peeling defect in Cu-Fe alloy strips.
维普
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