Method for producing micro alloyed cold rolled strip with varying thickness by two rolling and tempering processes

摘要

A method for producing a micro alloyed cold rolled strip with sections of varying thickness has a hot rolled blank cold rolled in a first process followed by a tempering process between 500 and 600 deg.C. The strip is cold rolled in a second process, to selected thickness, with a progressive thickness change between selected thickness layers, i.e. without weld seams, followed by a second tempering at 10 to 20 percent higher temperatures.