Effects of Alloying Elements on Cu Enrichment at Copper-Containing Steel Surface after High Temperature Oxidation and Hot Rolled Plate Quality

For resolving copper brittleness of copper-containing steel, the effects of Si, Cr and B elements on Cu enrichment on the surface of Fe-0.5Cu alloy after high temperature oxidation were studied by melting technique with vacuum arc furnace. The copper-containing steel with composition modification was rolled by ternary rolling mill. The results show that there were white banding copper segregation areas near the the surface of the Fe-0.5Cu alloys withot alloying elements after oxidation at 1 120 ℃ for 80 min, the content of copper in the area reached 75%. The copper segregation was not formed in the alloy with Si additive or Si and B additives. With Si and Cr additives, a large number white copper enrich phases were formed at the interface of matrix and oxide coating, but not penetrated to the matrix along the grain boundaries. The surface quality on the edge of hot rolled plate was improved by addition of Si element after removing of Ni.