On the influence of deformation of deep drawing quality steel sheet on surface topography and friction

Abstract

In this paper, the effect of sheet deformation on the change of the surface roughness parameters and friction coefficient value is considered. For this purpose, deep drawing quality (DDQ) steel samples were straightened using a uniaxial tensile test to different true strain values. The correlation between the surface roughness parameters and frictional conditions of the tested sheets was investigated in the strip drawing test. It was found that the friction coefficient determined for all pre-strained samples decreases with increasing nominal pressure of rolls under both dry and lubricated conditions. An increase in the plastic deformation of sheets under the uniaxial tensile stress state causes a nearly linear increase in the value of basic amplitude parameters of surface roughness.