The demand for high-strength hot strip grades for use in manifold industrial applications is on the rise. To process these kinds of steel, specific technical requirements in terms of rolling and processing have to be met. This includes safe strip coiling at the hot strip coiler as well as safe coil transport to the downstream stations.
Depending on the yield strength and the strip thickness, a coil has residual stresses that may cause it to spring open. Moreover, an instable coil may roll off the coil transfer car. To make sure the rolled, high-strength coils can safely be handled, SMS group offers custom-tailored technical solutions which are easy to integrate into hot strip mills, including existing and older ones, and which offer maximum safety for both the process and the operators involved.
As a rule, a distinction is to be drawn between two major requirements: on the one hand it is temporary securing of the steel coils during removal from the coiler, and on the other permanent self-securing of the coil due to targeted plastic deformation of the final wraps in the hot strip coiler combined with a significant reduction in the remaining bending moment. The aim must be to safely transport the coil to the strapping machine to further secure the coil.