Aluminum foil in the production of rolling process will inevitably have a certain degree of wear and tear, after the study we found that aluminum foil wear has some characteristics, for everyone to conduct a simple analysis.
Aluminum foil in the rolling process, due to plastic deformation of the metal, continuous generation of new surfaces, but also in the contact surface with a high unit pressure, coupled with high deformation temperature, sliding speed and other characteristics, so that the roll surface adhesion Metal, roll wear and other phenomena is particularly prominent. When the adhesion between the metal and the roll, the sliding friction between the two will be transformed into the metal surface of the internal friction, the secondary surface of the shear deformation, so that the metal adhesion to change the location of the friction state, Resulting in changes in the state of the metal stress 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, and the roll is abruptly worn out, and the service life is shortened, and the rolling process can not be performed normally.
The wear is very complicated during the rolling process. Metal wear is related to metal materials, surface oxide, work hardening, processing temperature, speed, lubricant, and surroundings. In the process of material deformation, the wear mechanism may be one or several mechanisms at the same time. Moreover, the deformation process itself is also changing. During rolling, the roll is continuously and continuously contacted with the workpiece, and the surface of the workpiece into the deformation zone is constantly changing. In addition, the workpiece after pickling its surface clean, when exposed to the surface of the dirty roll, due to plastic deformation and extension of the adhesion increased the possibility of wear and tear of the wear and tear, if the wear particle height greater than the film thickness, then the particle Will be pressed into the surface, the role of grinding the surface of the roll.
The type of wear varies depending on the contact surface morphology, contact conditions and environmental conditions. However, the general can be 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 the erosion of the surface of the active material and subsequent friction and fragmentation of these reactants due to mechanical action. Different types of wear can occur separately, occurring one after another or at the same time. And the stress on the wear surface is too high, it is a common phenomenon of various wear characteristics.