In particular operating conditions, the bearings can get a longer life of traditional computing, in particular in the case of a light load. These special operating condition is that, when the rolling surface (track and the rolling member) by a lubricant film effectively separated and limit the pollutants may cause surface damage. In fact, in the ideal conditions, the so-called permanent bearing life is possible.
(1) poor lubrication
Bearings using the lubricating oil (or grease) has a certain temperature, when the temperature is too high will degenerate, and thus lose the lubricating action, so that the bearing due to high temperature burnout. In addition, the lubricating oil (or grease) itself bad texture or running fuel (fat) is not timely, bearing temperature can also cause or produce a different sound.
(2) rotor unbalance
In general, the operation of equipment rotor should be carried out prior to assembly moving, static balance, so the bearing is not a problem. But some of the rotor during operation due to the wear of the the corrosion media or solid impurities, or the shaft appears bent, it will result in unbalanced centrifugal force, so that the bearing heat, vibration, raceway severe wear, until destruction.
Not only bearing the bad quality of the workpiece surface and the workpiece resistance to intergranular corrosion decline. When bearing workpiece serious overheating generated coarse grains, 8 ferritic steel increased also makes it easy to cause deterioration of the hot workability of the workpiece. The stainless steel accompany the body or flange parts in lcrl8Ni9Ti when overheating, easy peel-like surface defects.
To this end, put forward the following preventive measures:
 (1) is strict control lcrl8Ni9] ri stainless steel box, flange piece forging heating temperature and heating insulation time to prevent the workpiece overheating the workpiece to generate coarse grain defects.
 (2) workpiece forging production, such as forging ratio is too small, the high final forging temperature, coarse grain structure also prone to defects, the workpiece forging more than appropriate, full, final forging temperature is moderate.
 (3) bearing workpiece heat treatment solution treatment temperature should not be too high, not too long holding time, heating temperature should be no higher than 1150 "C, appropriate holding time 1-l_5min/mm calculated.
 (4) The the coarse workpiece overheating organization, can be changed forging grain refinement method to eliminate defects, orange peel-like surface defect appears to prevent the deformation of the workpiece in the cold, and to improve the surface quality of the workpiece.



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