Bearing failure is a common problem during the operation of bearings, and the form of wear is a type of bearing failure. Wear can also cause significant damage to bearings, and repairing a few pieces can directly lead to bearing damage and failure. Here are several common forms of bearing wear. When encountering wear during the use of bearings, you can make good repairs based on the specific wear form.
1. Oxidative wear. The small peaks and valleys on the surface of the relative movement of bearings combine with oxidation in the air to form brittle oxides that are not firmly bonded to the base metal. This oxide is easily detached during friction, and the wear that occurs is called oxidation wear.
2. Friction generates heat and wear. When the bearing operates at high speeds, heavy loads, and poor lubrication, high temperatures are generated at the outer peak and valley due to friction, resulting in a decrease in contact hardness and wear resistance, and even adhesion and tearing. This type of wear is called frictional heat generation wear.
3. Hard particle wear. If the bearings are in relative motion. The movement surface of the bearing is uneven in organization, with hard particles present, or impurities such as sand, debris, and chips falling between the movement surfaces of the bearing. During relative movement of the bearing, hard particles or impurities can scratch or even form grooves on the surface of the bearing, which is called hard particle wear.
4. Pitting wear. The rolling contact surface of gear bearings is periodically subjected to significant contact pressure during the relative process. Over time, fatigue occurs on the metal surface, resulting in small cracks and erosion on the bearing surface. This type of wear is called pitting wear.
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