Stainless steel tapered roller bearing S30206
Cylindrical roller bearing
- Select the bearing according to the working conditions
- Operating temperature
Normal temperature working bearings, chromium bearing steel. Chromium bearing steel is also used when the operating temperature is higher than 150 ° c and lower than 250 ° c, but special heat treatment is required (200 ° c or 300 ° c tempering is required).
- The size of the impact load
Bearing bearing strong impact load, generally do not use chromium bearing steel, most of the use of high quality carburized structural steel, impact resistant tool steel or tempered structural steel.
- Contact media
Bearings used in corrosive media must be made of corrosion-resistant steel or alloy steel with good corrosion resistance.
Two. According to the bearing structure type selection
Bearing parts structure is more complex, such as outer ring belt installation retaining edge, and bear high impact load, it is appropriate to use good processing performance of carburizing steel; The outer ring of the punching needle roller bearing can be made of 08 and 10 mild steel (good plasticity, suitable for cold stamping). The joint bearings used on the swing mechanism or the operating mechanism can be formed by cold extrusion of GCr15, 9Cr18, 9Cr8Mo and alloy structural steel with excellent cold plastic deformation performance.
Iii. Selection according to the fatigue life and reliability requirements of the bearing
The fatigue life and reliability of bearings depend to some extent on the purity and microstructure uniformity of the steel. For general use, the use of acid open furnace or alkaline electric furnace smelting of common bearing steel. With the continuous improvement of the smelting method, new smelting methods such as current remelting, vacuum smelting, and electron beam furnace smelting have been produced, and the service life of bearing steel made from the bearing refined by the above methods has been correspondingly improved. It is suitable for bearings with special requirements for fatigue life and reliability, such as axle box bearings for railway vehicles, spindle bearings for aeroengines and bearings for navigation systems.
In addition, in the choice of steel should also be comprehensive consideration of steel processing performance, supply and domestic resources.