INA bearings common fatigue failure of treatment

INA bearing fatigue life test is sufficient lubrication on the maximum inhibition of auto bearing wear factors, adopting strengthening load and speed in order to highlight the bearing fatigue factors of a strengthening of the fatigue life test method. Bearing fatigue life calculation method and the fatigue life test is complementary to each other, the results obtained both have enough correspondence. But in reality, such as the use of each specific occasions, all makes a life test of a sufficient number of INA bearings to verify whether bearing suits, the economically, time and labor is very big, so the car bearing life test method only in the case of necessary or important, in the vast majority of cases, with a standard calculation method to estimate the life of a bearing service life and has a sufficient degree of dependency. To predict the fatigue life of INA bearings, 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, can judge auto bearing fatigue testing material change. INA bearings breaking off effect secondary reason are the two general defects from overload. When the applied load across the material strength limit and fracture forming parts called overload fracture. Overload causes minor from machine and dismantling of sudden trouble or wrong. Bearing parts of micro crack, shrinkage cavity, bubbles, large foreign impurity, overheating organizations and local burns and other defects are will impact overload or violent vibration are defect provoked fracture, referred to as a defect fracture. Should point out that auto bearing, making process of this material into the factory reinspection, cast and heat treatment of measure control, process control by instrument precise exposition of the above defects can not, then still must strengthen self-control. But in general, all flush INA bearings breaking off effect greatly for overload.