More and more annealing lines are equipped with in-line quench to meet the demands for high-yield strength material to the automotive industry. Quenching can be a real challenge since Martensitic steel has a different density than other steel grades. Rapid cooling may also result in plastic deformation when the cooling distribution is uneven. Parameters like nozzle distribution and angle as well as turbulence over the surface are important factors. Clogged or worn-out nozzles will also cause flatness issues.
During the installation of a new in-line quench, a VeriFlex or VeriFlat gauge can pay for itself by shortening tuning time and verify the result. Over time, the flatness quality can be further improved and the gauge will also serve as a guardian and detect flaws and malfunctions in the line.