Skin-rolling of hot-rolled extra-thin low-carbon steel sheets

Abstract

Skin-rolling is the final operation of the technological process for the production of auto sheet steel. Tempering affects the quality of the metal surface, properties and stamping ability. Treading allows you to harden the surface of the rolled products and keep the inner layers undeformed. As a result, it is possible to prevent the formation of shear lines during stamping and provide an optimal combination of the mechanical characteristics of rolled products. On skin-rolling mills, the sheet is rolled to a predetermined thickness. Treading etched sheets provides them with a smoother surface. Benefits skin training are to increase the ability of the material to deep drawing and reduce energy costs during stamping.The use of skin-rolling will allow to produce high-quality rolled products in accordance with the requirements of standards. An analysis of the effect of skin-rolling on the quality indicators of low-carbon steel thin-rolled products for the automotive industry was carried out. The effect of skin-rolling on the structure and mechanical properties of hot-rolled extra-thin sheet metal from 08пс low-carbon steel was studied. The mechanical properties of the metal meet the requirements of ДСТУ 2834-94 for hot-rolled and cold-rolled steel. Annealing of extra-thin sheet steel from 08пс steel increases its plasticity compared to the hot-rolled state and contributes to the formation of a uniform metal structure in accordance with ДСТУ 2834-94. The choice of parameters and optimization of the skin-rolling process will prevent a decrease in the plasticity of the material, improve mechanical properties and improve the quality of extra-thin sheet steel.