KOYO linear bearing manifestation of erosion effect on life

Bearing by using environment is different, so the erosion performance are also different, because the erosion in a different way. KOYO bearing, of course, also won't get away eroded this fate, below is speaking about axis linear bearing erosion in three ways. 1, the cavitation cavitation of KOYO bearing contact with the liquid and solid surface is generated by the relative motion form of surface damage. When the lubricating oil in the oil film of low pressure area, oil will form bubbles, the bubbles movement to high, the pressure under the action of air bubble breaking, the breaking of instant impact and high temperature, solid surface under the effect of the impact of repeated, material fatigue peeling, the friction surface appear small pits, and then developed into the cavernous scars. Overload, high speed, and the sliding bearing with higher load and speed, often occurs cavitation; 2, fluid erosion of linear bearing fluid erosion refers to the fluid fierce shock can cause fluid solid surface erosion, point to appear on the solid surface scars, the damage of the surface is smooth; 3, the electric erosion of KOYO bearing electrical erosion means due to the motor or electric leakage, produce electric spark between the linear bearing friction surface, on the friction surface caused by dot scar, is characterized by damage reciprocating appear on the surface of the journal that hard. To predict KOYO bearing fatigue life, residual life, we have to know all of the bearing fatigue damage phenomenon, this will take a long time. However, due to the rolling fatigue happened under the compressive stress of contact fatigue, to achieve damaged great material changes will occur. Therefore, in addition to early crack, raceway surface appear to suffer before chemical effect, the propagation of the crack material change, may judge linear bearing fatigue testing material change. Linear bearing fatigue failure is a failure surface form, main performance for fatigue crack initiation, expansion and fracture process, under the alternating load generated by the fault of the long-term effects of the metal. Cracks in two aspects: first, on the surface, it is, linear bearing in the process of rolling contact, because of the work in the plastic deformation and strain hardening on the surface of the contact stress on the surface of the cyclical changes caused by the effect of external load, and finally on the inner surface of the small crack from the development, the formation of surface crack between the two, because Xie into the lubricant on the surface of the work, the power of the open, crack down on the wall, crack force to move forward; Under the pressure of two: from the surface, again and again, the surface contact, the first where exposed on the surface of the crack depth of a crack, and along the surface direction Angle, to a certain depth, since on the surface of contact area, and beyond the surface, and finally form the corrosion, leaving a horse pit. On the surface, or from the surface of the crack, the two objectives ( Part carburizing, quenching and other surface heat treatment, if after have uneven hardness, organization, and the internal stress of non-uniform and other adverse, the contact stress is generally have the opposite under the influence of ground fissure, if parts surface quality is poor, there is a defect ( Oxidation and decarburization) Poor lubrication, friction or from the surface crack.