Patent ID: 7922840
Filing Date: 2011-04-12
Classification: B21B,C21D

Abstract:
1. Method for producing hot-rolled strip from austenitic stainless steels, in which, in a first step, a cast product ( 6 ) is subjected to a rolling operation in a rolling mill with a finishing train and, in a second step, a heat treatment is carried out to prevent susceptibility to corrosion, especially intergranular corrosion due to chromium carbide precipitation, wherein, to establish the final rolling temperature (Twe), a run-in temperature (Tein) of the cast product into the finishing train of the rolling mill that is above 1,150° C. is established by a multistage heating process, which comprises a preheating stage and an intensive heating stage, and the heat treatment is carried out by directly using substantially only the rolling heat, the method further including descaling the cast product after the preheating stage and before the intensive heating stage, wherein the descaling is the only process carried out between the preheating stage and the intensive heating stage.