Abstract
Polymer coated steels are used in the packaging industry to produce a variety of products, for example cans. During the production of the cans, the steel substrate and the polymer undergo a roughness development. The roughness development is important regarding the product performance and depends (among others) on the original grain size of the steel substrate. The goal of this paper is to investigate the influence of the grain size of the steel substrate on the surface roughness during the production process of the can. For this purpose, 3D topography measurements were performed after several process steps (drawing, redrawing and ironing) of can making. A larger grain size results in a higher roughness increase and a lower minimum coating thickness of the inside of the can.
Highlights
Polymer coated steels are used in the packaging industry to produce cans
Numerous articles can be found on the influence of strain, grain size and texture on the roughness development
Roughness development of polymer coated steel during the production process of a can The aim of this paper is to investigate the influence of the grain size of the steel substrate on the surface roughness during the production process of a can
Summary
Polymer coated steels are used in the packaging industry to produce cans. They hold many advantages, such as protection of the metal against the relatively aggressive filling goods, good formability and no solvent emissions in the processing route. Deformation in metals causes roughening, which has a direct influence on the appearance, weldability and lubricant transport. Numerous articles can be found on the influence of strain, grain size and texture on the roughness development. A linear relationship is found between roughness and grain size [1,2,3]. Not in all investigations a linear relationship was observed, especially not at higher strains [4]
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