Compared with metal bearings, ceramic bearing advantages are highlighted

1. Since ceramics are hardly corrosive, ceramic rolling bearings are suitable for operation under the harsh conditions of corrosive media.

2. Since the density of the ceramic rolling ball is lower than that of the steel, the weight is much lighter, so the centrifugal effect of the outer ring can be reduced by 40% when rotating, and the service life is greatly prolonged.

3. The influence of thermal expansion and contraction of ceramics is smaller than that of steel. Therefore, when the clearance of the bearing is constant, the bearing can be allowed to work in an environment where the temperature difference changes drastically.

4. Since the modulus of elasticity of ceramic is higher than that of steel, it is not easy to deform when subjected to force, so it is beneficial to increase the working speed and achieve higher precision.
For more products, please visit: http://www.supplyforever.com/

Development trend of bearing heat treatment technology

(1) Cleaning and heat treatment Waste water, waste gas, waste salt, waste oil and electromagnetic radiation formed by heat treatment will cause environmental pollution. To solve the environmental pollution problem of heat treatment, the implementation of clean heat treatment (or green heat treatment) is one of the development directions of heat treatment technology. This places high demands on the heat treatment atmosphere, quenching oil and cleaning equipment.

(2) Precision heat treatment Precision heat treatment is to ensure the stability of the optimized process, to achieve a small dispersion of product quality (or zero), heat treatment distortion to zero, reduce grinding retention to improve production efficiency and save materials. To achieve precision heat treatment, it must have good furnace temperature uniformity, temperature control accuracy, and good cooling and stability of the quenching agent. The precise heat treatment of the bearing can take the two steps of integral quenching and induction quenching.

(3) Energy-saving heat treatment A new type of insulation material is selected to improve the energy utilization rate of the heat treatment equipment; the heat treatment process is optimized, the process yield is improved, and the equipment capacity is fully utilized. At this stage, all bearing manufacturers are doing experiments in this area, such as making full use of waste heat and waste heat. Some manufacturers have used forging waste heat to perform spheroidizing annealing of bearing parts. The process with low energy consumption and short cycle replaces long cycle and high energy consumption. The process of the lower bainite quenching process replaces the long cycle and high energy carburizing process with a short bainite quenching process to a certain extent and within a certain range.

(4) Less oxidation-free heat treatment is heated by a protective atmosphere heating instead of an oxidizing atmosphere to control the carbon potential and nitrogen potential in a controlled atmosphere. The properties of the parts after heat treatment are improved, and heat treatment defects such as oxidation, decarburization and cracking are greatly reduced. The finishing allowance after heat treatment is reduced, which improves material utilization and machining efficiency. Vacuum heating, gas quenching, vacuum or low pressure carburizing, nitriding, nitrocarburizing and boronizing can significantly improve the quality of the workpiece, reduce distortion and improve life.
For more products, please visit: http://www.bearingkingdom.com