Wear characteristics during aluminum foil rolling

In the process of rolling aluminum foil, the metal plastic deformation occurs, continuously generates new surface, and contact surface with the unit of high pressure, coupled with the deformation characteristics of high temperature and sliding speed, the roll surface adheres metal, especially the phenomenon such as roll wear. When the adhesion occurs between metal and roll, the sliding contact friction between them is then transformed into internal friction of the metal surface and subsurface shear deformation, so as to change the place of the part with metal adhesive friction state, which leads to the change of stress state and metal flow state. As a result, the friction is increased, the force energy consumption is increased, the surface of the product is significantly damaged and the roll is rapidly worn, and the service life is shortened.

The wear condition during rolling of aluminum foil for sale is very complex, and the wear of metal is related to metal materials, surface oxides, processing hardening, processing temperature, speed, lubricant and surrounding environment. In the course of material deformation, wear mechanism may be one or more mechanisms working together. And the deformation itself is changing. During rolling, the roll contacts with the rolled parts repeatedly and continuously, and the surface of the rolled parts into the deformation zone is also changing constantly. In addition, after pickling, the work-piece surface is clean, when in contact with the dirt of the surface of the roll, for plastic deformation and the possibility of extending increased adhesion and wear particle peeling, if wear particle height is greater than the oil film thickness, so, particle surface will be pressure on the surface of the grinding roll role.

Due to different contact surface topography, contact conditions and environmental conditions, wear types are also different. However, it can be divided into mechanical wear and chemical wear. Mechanical wear is a kind of wear process related to friction, abrasive wear, erosion and fatigue. Chemical wear is caused by the erosion of surface by various active substances, followed by friction and breakage of these reactants due to mechanical action. Different types of wear can occur individually, sequentially or simultaneously. Excessive stress on the surface of wear is a common feature of wear phenomena.