Among gyratory crusher gyratory crusher parts wear problems can not be ignored, such as gyratory crusher wear parts, gyratory crusher spare parts. so why do wear parts fail?
Adhesive wearMachined parts often have adhesive wear. Adhesive wear means that in the process of sliding friction, the friction vice contact surface local metal adhesion, adhesion is easily damaged in the subsequent relative sliding, so that the metal particles from the surface of the part off or the surface of the part abrasion. When the interacting surfaces are in contact, the contact occurs only in a few individual tiny bumps, and due to the small contact surface, the stress that occurs in the contact area is very large, resulting in plastic deformation of the contact surface, the surface film layer is destroyed by the metal flow, so that the metal atoms are directly in contact with the resulting bonding, the formation of cold welded joints, which triggers the adhesion. In the relative sliding process, the adhesion place is damaged, the metal chip particles from the surface of the parts. Adhesive wear is usually divided into three stages: abrasive, steady wear and violent wear.
Abrasive WearGeneral abrasive wear is the movement of harder abrasive materials in contact with the friction surface, causing the surface to lose material. In industrial production, abrasive wear increases material consumption, and it appears that abrasive wear causes more than half of the wear loss.
Surface fatigue wear surface fatigue wear is when the two contact surfaces rolling, sliding or rolling-sliding composite movement due to the role of the friction surface microscopic volume of the periodic contact load or alternating stress, resulting in the surface as well as the subsurface due to fatigue cracks, and ultimately lead to material loss. Surface fatigue wear cracks will occur on the surface and subsurface, and along the parallel or perpendicular to the surface of the extension of the direction, and ultimately lead to the surface material will be flaked in fine flakes, the emergence of pockmarks or pox spots in the shape of the flaking pit.
Corrosion wear in the friction process, friction between the vice or friction between the surface and the environmental media or chemical reaction or electrochemical reaction to form corrosion products, due to the formation of corrosion products and wear caused by the shedding of corrosion products is corrosion wear. Corrosion wear can be divided into chemical corrosion wear and electrochemical corrosion wear two categories. The most important chemical corrosion wear is oxidative wear. When the friction vice for relative motion, the raised part and the other side of the friction contact produced plastic deformation, the oxygen in the air into the plastic deformation layer, the formation of oxide film. However, because of the low strength of the oxide film, so when the second bump will peel off and expose the new surface, the new surface is oxidised to form an oxide film, and then peeled off. After this is repeated, the surface of the mechanical part gradually wears out and eventually the part fails.
