Interpreting the radiative properties of advanced high strength steel strip using a hybrid thin film/geometric optics model

Advanced high strength steel (AHSS) alloys derive their mechanical performance through a carefully controlled intercritical annealing process. Unfortunately, variations in spectral emissivity caused by selective oxidation and non-uniform surface roughness imparted by cold-rolling impact the accuracy of the pyrometrically-inferred temperatures used for process control. This study evaluates the spectral reflectance of cold-rolled and annealed …