Table of Contents

    • 50

    • Maximizing Impact Force From Descale Headers Using CFD Analysis

      Descale nozzles and headers need to be sized to maximize the impact performance of the nozzles. Impact testing, along with computational fluid dynamic analysis, can help to determine if a header has been properly designed to provide maximum impact force. Comparing the results with an ideal condition can help to optimize descale header design.

    • 64

    • Optimizing Blade Gap With Various Sharpness for Plate Shearing

      In plate production, the blade gap setting for plate shearing is very critical to the sheared-end quality and near-end plate flatness. The shear forces between the top and bottom blades can generate a bending moment in the longitudinal direction due to the blade gap. When the top and bottom blades are worn unevenly, the shear forces can generate a transverse bending moment. In order to secure both sheared-end quality and near-end plate flatness, this paper intends to optimize the blade gap with various sharpness.

    • 74

    • Reheat Furnace Operational Effect on Hot Roll Product Quality

      In industrial operations, it is difficult to control the uniformity of heating along the entire length and through the thickness of the workpiece. This factor is often not given high priority when evaluating mechanical property diversions. Corrective actions and operational practice recommendations are presented in order to minimize inhomogeneous heating, which results in inferior product quality.

    • 84

    • Latest Developments and Rolling Results of HSS Work Rolls for All Stands in Hot Strip Mill Finishing Trains

      Since the late 1980s, high-speed steel (HSS) rolls for hot strip mills have been developed to meet strip quality and efficient mill productivity requirements. For earlier stands, resistance against wear and surface deterioration of HSS rolls have been significantly improved. For later stands, a new type of HSS roll was developed that shows both excellent wear resistance and anti-sticking resistance. Based on the rolling results of the above-mentioned HSS rolls, roll usage can be optimized.

    • 170

    • Elevated- and Room-Temperature Mechanical Behavior of Zn-Coated Sheet Steel for Hot Stamping

      Cracking and accompanying zinc penetration in galvanized press-hardened parts have been observed in industry and have raised concern about the potential for liquid metal embrittlement. Consequently, the mechanical behavior of Zn-coated 22MnB5 was assessed in tension at either elevated temperature or room temperature after being heated under various soak time and temperature conditions relevant to hot stamping.