Before using the process of bearing, bearing should first good detection. Have a look what is the difference between the structure and performance of his. To solve these problems, we should take what measures?
Through the experiment and Research on the long-term, strengthen the bearing. This might help, greatly improve the bearing. Not only is the bearing in appearance, interior changes to some extent. Now the appearance of strengthening technology can be classified from different angles, classified according to physical and chemical process of surface strengthening technology, can be divided into five categories: strengthening, heat treatment, surface chemical heat treatment, surface metallurgy, surface film to strengthen deformation surface strengthening.
1 bearing surface deformation strengthening
To form a high hardness and hardened layer with high strength, bearing by mechanical method to make the metal outer layer of plastic deformation. This appearance is strengthening method for deformation strengthening appearance, also known as work hardening. Including the shot blasting, sandblasting, cold extrusion, rolling, cold rolling and impact, explosion shock etc.. The characteristics of these methods is to strengthen the dislocation density increased, subgrain structure refinement, so its hardness and strength increased, the surface roughness decreases, can significantly improve the appearance of fatigue strength of machine parts and reduce fatigue notch sensitivity.
This strengthening method has the advantages of simple process, obvious effect, there is no clear boundary between the hardened layer and the substrate structure, coherence, not easy to fall off in use. Many of the method has been used in the bearing industry: rolling body appearance impact application of reinforcement is this kind of method, precision rolling has become the ferrule processing new and strengthening method.
2 bearing surface heat treatment
By the methods of rapid heating of the surface layer of components known as surface hardening process heat, bearing using solid-state phase transformation. Commonly known as surface quenching. Including flame hardening, high (middle ) frequency induction heating quenching, laser heating or electron beam heating quenching.
The characteristics of these methods is the appearance of local heating, the workpiece deformation is small; the heating speed, high production efficiency; the heating time is short, the appearance of oxidation and decarburization very slight. The method is particularly to improve the acceptance of wear resistance and fatigue strength the effect of large-scale and oversize bearing parts of the significant impact load.



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