Aluminum foil will inevitably have a certain degree of wear during the production and rolling process. After research, we found that aluminum foil wear has certain characteristics, so we will do a simple analysis for everyone.
During the rolling process, the aluminum foil is plastically deformed, and a new surface is continuously formed, and the unit surface has a high unit pressure, and the deformation temperature is high and the sliding speed is large, so that the surface of the roll adheres. Metals, roll wear and other phenomena are particularly prominent. When the adhesion between the metal and the roll occurs, the sliding external friction between the two changes to the internal friction of the metal surface layer, and the shear deformation of the sub-surface layer occurs, thereby changing the friction state at the metal adhesion portion. This causes changes in the state of stress of the metal and changes in the flow state. As a result, the friction is increased, the energy consumption is increased, the surface of the product is significantly damaged, the rolls are sharply worn, the service life is shortened, and the rolling process cannot be performed normally.
Wear during rolling is extremely complex, and metal wear is related to factors such as metal materials, surface oxides, work hardening, processing temperatures, speed, lubricants, and the surrounding environment. During the deformation of the material, the wear mechanism may be one or several mechanisms acting simultaneously. Moreover, the deformation process itself is also changing. During rolling, the rolls are repeatedly and continuously in contact with the rolled piece, and the surface of the rolled piece entering the deformation zone is constantly changing. In addition, the surface of the workpiece is cleaned after pickling. When it comes into contact with the surface of the dirty roll, the plastic deformation and extension increase the possibility of adhesion and the peeling of the wear point. If the height of the wear point is greater than the thickness of the oil film, then the particle point The surface will be pressed to act as a grinding roller surface.
The type of wear varies depending on the surface topography, contact conditions and environmental conditions. However, it can be generally divided into two major types of mechanical wear and chemical wear. Mechanical wear is a type of wear process associated with friction, abrasive wear, erosion, and fatigue; chemical wear is caused by erosion of surfaces by various active materials, which are subsequently caused by mechanical action to cause friction and breakage of these reactants. Different types of wear can occur individually, sequentially or simultaneously. The excessive stress on the worn surface is a common feature of various wear phenomena.