Common cylindrical roller bearing model difference
Common cylindrical roller bearing model difference
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The factors affecting bearing steel main material - Group sales co. , LTD
by：Waxing
2020-11-19
In the aspect of the service life of the bearing is affected by many factors, jiaxing bearing manufacturing co. , LTD. , in the field of practical application and the steel mills to discuss summary about as follows: influence of high carbon chromium steel rolling bearing parts service life of main material factor and the control level (
1)
In the original organization in front of the quenching steel requirements small, dispersion carbide.
Can use high temperature austenitizing 630 ℃ or 420 ℃ high temperature, also can use forged heat to achieve rapid annealing process.
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2)
For GCr15 steel after quenching, demanding the average carbon content is 0.
About 55% of cryptocrystalline martensite, 9% Ar, and about 7% is uniform, round state did not dissolve carbide microstructure.
Can use quenching heating temperature and time to control the microstructure.
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3)
Parts after quenching temperature tempering requirements surface has a larger residual compressive stress, which will help to improve the fatigue resistance.
Can be used in quenching heating surface carburized or short time nitriding process, make the surface has a larger residual compressive stress.
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4)
Manufacturing steel bearing parts, requirement with high purity, mainly is to reduce the O2, N2, the content of P, oxides and phosphide.
Can be used esr, vacuum smelting technology measures such as oxygen materials & le;
It is advisable to 15 PPM.
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