Abstract
This paper deals with the experimental examination of surface micro-hardness improvement ratio in burnishing of external cylindrical workpieces. The material of the examined workpiece was AISI 304 austenitic stainless steel. In our experiments, we investigated the sliding frictional burnishing of an outer cylindrical surface when the burnishing tool had a diamond material-grade spherical tip. Using the full factorial experimental design technique, we aimed to determine how the changes in burnishing parameters, i.e., burnishing speed, burnishing feed, and burnishing force effect on the changes of surface micro-hardness and surface micro-hardness improvement ratio. Based on examinations, the best burnishing parameter combination could be selected.
Highlights
We investigated the sliding frictional burnishing of an outer cylindrical surface when the burnishing tool had a diamond material-grade spherical tip
Due to their increased corrosion resistance, stainless steels are widely used in various fields of engineering practice, such as food industry, chemical industry, and automotive industry
Sliding friction burnishing is kinematically similar to turning, but instead of the insert of the cutting tool, the deforming element is a large radius sphere tip that is moved by applying a certain amount of pressure to the surface to be machined
Summary
Due to their increased corrosion resistance, stainless steels are widely used in various fields of engineering practice, such as food industry, chemical industry, and automotive industry. The most common requirements for the surfaces of parts made of such steels are low roughness, high micro-hardness and wear resistance These requirements can largely be satisfied by the use of cold-plastic burnishing technologies. Sliding friction burnishing is kinematically similar to turning, but instead of the insert of the cutting tool, the deforming element is a large radius sphere tip that is moved by applying a certain amount of pressure to the surface to be machined. This creates a plastic deformation on the surface of the workpiece and in the layers close to the surface (Fig. 1) [1]. (steel, non-ferrous metal alloys), e) type of machined surface (outer cylindrical surfaces, inner cylindrical surfaces, flat surfaces, complex surfaces, discontinuous cylindrical surface), f) examination of process parameters (ironing force, ironing depth, feed, ironing speed, the number of passes, the lubricant, the radius of the spherical tool, the diameter of the cylindrical tool)
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