Effect of two-pass rolling of textured roll and polished roll on surface topography and mechanical properties of 316L stainless steel ultra-thin strip

The textured roll and polished roll were applied instead of the ground roll in a 20-high mill to conduct two-pass rolling of 316L stainless steel strip with thickness of 0.027 mm. After the two-pass rolling with the textured roll and polished roll (TPR), the surface roughness of the strip is dramatically reduced, and the surface topographical anisotropy index is diminished to 30.9% of the initial strip. Comparing with the strip rolled using the ground roll in both passes (GGR), the elongation of TPR rolled strip is obviously improved, and the mechanical property anisotropy is greatly weakened. The anisotropy index of tensile strength and elongation are 42.58% and 52.59% of that of GGR rolled strip, which is mainly attributed to the significant decrease of the texture intensity of the strip by TPR process. The results indicate that TPR process can obtain the stainless steel ultra-thin strip with smooth and uniform surface topography and good mechanical properties.