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I. cage materials
(1) The vast majority of steel cage bearings are used, the most widely used is carbon steel stamping ribbon, basket-shaped, box-shaped cage, etc., suitable for working conditions and environmental bearing carbon chromium bearing steel; with carbon steel plate stamping cage resistant bearings suitable working conditions and environmental corrosion of bearing steel.
(2) smooth surface with good quality non-ferrous metals. Under high temperature conditions, can be manufactured silicon bronze solid cage, working temperature up to 315 degrees Celsius; Because aluminum is lower than the strength of brass, light weight, and thus used aluminum and brass solid cage, mainly applied to speed a higher proportion of light, corrosion and other conditions.
(3) using engineering plastics cage, another great development in recent years, mainly because it has some corrosion resistance, self-lubricating performance, small friction, easily obtained, cheap, easy to manufacture, etc., but Easy "aging." Currently used by 66 of the most widely reinforced nylon, it can continue working temperature range of -40 to 120 degrees Celsius.
PTFE high strength, self-lubricating properties, continuous working temperature up to 300 degrees Celsius, phenolic tape has high mechanical strength, excellent heat resistance, wear resistance, but expensive for high-speed spin Wai, operating temperature -40 to 150 degrees Celsius, up to 180 degrees Celsius instantaneous.
Two. Rings and rolling materials
(1) carbon chromium bearing steel
The vast majority of the bearing rings and rolling elements are colored with a special steel manufacturing. With high carbon chromium bearing steel (GCr15 and GCr15SiMn with ZGCr15 and ZGCr15SiMn) manufacturing rings and rolling elements, the hardness of their parts as follows:
GCr15 and ZGCr15 materials with rings and rollers for the HRc61 ~ 65, the ball was HRc62 ~ 66;
GCr15SiMn and ZGCr15SiMn materials with rings and rollers for the HRc60 ~ 64, the ball was HRc60 ~ 66.
With high carbon chromium bearing steel bearings are generally applicable to the operating temperature range of -40 to 130 degrees, oil and grease properly. To meet the requirements of general machinery.
Carbon chromium bearing steel bearing parts at high temperature back too far, its adaptation to the operating temperature of up to 250 degrees.
With advances in smelting technology, high carbon chromium bearing steel smelting can use different methods, such as vacuum smelting technology can significantly reform the intrinsic quality of the steel, particularly non-metallic inclusions in steel and oxygen are formed significantly reduced. In this high-carbon chromium bearing steel bearing fatigue life can grow exponentially.
According to a lot of comparison data show that different methods of smelting obtained GCr15, GCr15SiMn, ZGCr15, ZGCr15SiMn bearing steel bearings.
(2) carburizing bearing steel
By carburizing bearing steel manufacturing rings and rolling elements, its hardness is: rings and rolling elements of HRc60 ~ 64, general fitness and working temperature range of -40 to 140 degrees Celsius, the oil and greased properly, can Under greater shock and vibration conditions, such as locomotives and rolling mill bearings, etc., but the steel heat treatment process is more complicated.
(3) heat-resistant bearing steel
Heat-resistant steel ferrule bearing rolling elements, its hardness: rings and rollers for the HRc60 ~ 64, the ball was HRc61 ~ 65, under normal circumstances lubrication for operating temperature of 120 to 250 degrees Celsius, such as aircraft engines, gas turbines and other spindle working conditions.
(4) corrosion-resistant bearing steel
Corrosion resistant steel bearing rings and rolling elements, its hardness is: rings and rolling elements should not be less than HRc58, for water, nitric acid, chemical reagents and other corrosive media, the temperature is -253 to 350 degrees Celsius
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