Texture analysis of tinplate steel and its application in production of double reduced high strength tinplate grades with controlled earing properties

Abstract

Several years of texture investigation via X-ray Diffraction and EBSD techniques clearly highlight the effect of steel chemistry and processing on the final texture development in individual tinplate grades produced by U.S. Steel Košice. The influence of chemical composition, degree of deformation, and the annealing process on the texture development in tinplate steel is presented for selected grades processed in production and using the material controlled laboratory experiments. “Non-earing and Ultra-low Earing” tinplate materials provide a good case study where the desired final texture, which contains a strong γ fiber along with other texture component, is achieved with precise control of key processing variables. Development and production of high strength double reduced material with isotropic properties can be achieved by detailed study of crystallographic texture. As-measured Inverse Pole Figure (IPF) maps and calculated Orientation Distribution Functions (ODFs) were used to characterize the strength of the γ fiber and selected texture components. Calculation of the normal anisotropy index, r, from the acquired texture information, was accomplished for these steels using available crystal plasticity models. Achieved results of detailed texture analysis of tinplate in the manufacture of double reduced high strength tinplate steel grades have been successfully applied.