Smelting process and surface quality control of copper containing steel

Copper containing steel has good corrosion resistance and wear resistance, but high Cu content can easily lead to surface cracks or fissures in copper containing steel. In order to control the surface quality of copper containing steel, experiments were conducted in conjunction with the production process flow. By optimizing the composition of copper containing steel, the mass fraction ratio of Cu, Ni, and Si, which are sensitive to surface cracks, should be controlled at 3: 1: 3. In the process of steelmaking production, strict control of operational details is required, and protective pouring should be done well during continuous casting to avoid secondary oxidation of molten steel and ensure its purity. Ensure that there are no visible cracks on the surface of the continuous casting billet, slowly heat the billet, control the preheating temperature to ≤ 800 ℃, and require a reducing atmosphere in the heating furnace to prevent surface oxidation during billet heating, which may affect the quality of the rolled material. The rolling temperature should be controlled between 1170-1180 ℃ to avoid the melting of iron olivine (FeO-2FeO · SiO2) at the grain boundaries and reduce the diffusion and enrichment of copper rich phases. Strictly control the deformation of a single pass to no more than 30% and reduce the rolling stress during the rolling process. Ensure the slow cooling effect of the rolled material and avoid stress concentration and cracking during the cooling process. Strictly following the process described in this article can produce copper containing steel continuous casting billets and rolled materials of good quality.