Linear bearing contact fatigue strength and wear resistance of the bearing , bearing steel hardness, bearing steel rust resistance , workability

 

Linear bearing contact fatigue strength and wear resistance of the bearing , bearing steel hardness, rust resistance bearing steel processing performance related.

 

One, bearing spalling due to cracks appeared in the role of bearing the load cycle , the contact surface is prone to fatigue damage caused , so in order to increase the service life of bearings , bearing steel must have a high contact fatigue strength.

 

Second, wear

 

Wear good or bad bearing steel bearing direct impact on the work of rings, between the rolling elements and cage so that the sliding friction bearing parts constantly in order to reduce bearing wear work wear parts , precision bearings to maintain stability, extend life, must choose a better bearing steel as material.

 

Third, the hardness

 

Hardness is an important quality bearings quality of contact fatigue strength , wear resistance, elastic limit has a direct impact. Bearing steel hardness in the use of state general to reach HRC61 ~ 65, in order to make contact with the bearing to obtain a higher fatigue strength and wear resistance.

 

Fourth, rust resistance

 

In order to prevent bearing parts and finished products in the processing, storage and use of corrosion rust , requiring bearing steel should have good rust resistance .

 

Fifth, the processing performance

 

Bearing parts in the production process , to go through a lot of cold , heat processing procedures , in order to meet the high-volume , high efficiency, high quality requirements , bearing steel should have good processing performance. For example , hot and cold formability, machinability , hardenability and so on.

 

Bearing parts commonly used materials are: carbon chromium bearing steel , hardened steel ( eg 20Cr2Ni4A, 15Mn, 20Cr2MnMoA), high temperature bearing steel ( eg Cr4Mo4V, Cr14Mo4, Cr15Mo4V, W18Cr4V), stainless bearing steel (9Cr18, 9Cr18Mo, 1Cr18Ni9Ti) vacuum degassed steel , magnetic bearing steel , the most commonly used is carbon chromium bearing steel . Carbon chromium bearing steel base steel has GCr6, GCr9, GCr9SiMn, GCr15, GCr15SiMn, it is the most widely use of bearing manufacturing industry , the largest amount of steel, have good wear resistance and contact fatigue performance , a more ideal processing performance, with a certain degree of flexibility and toughness .

 

In addition to these basic requirements, bearing steel , the chemical composition should also be suitable to achieve uniform internal organization , less non-metallic inclusions , surface defects standard inner surface decarburization layer and the concentration does not exceed the requirements of these projects has the standard raw materials clearly defined.